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Mahantango Formation

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Ryder, R.T., Trippi, M.H., Swezey, C.S., Crangle, R.D., Jr., Hope, R.S., Rowan, E.L., and Lentz, E.E., 2012, Geologic cross section C-C’ through the central Appalachian basin from near the Findlay Arch, north-central Ohio, to the Valley and Ridge Province, Bedford County, south-central Pennsylvania:
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Ryder, R.T., Crangle, R.D., Jr., Trippi, M.H., Swezey, C.S., Lentz, E.E., Rowan, E.L., and Hope, R.S., 2009, Geologic cross section D-D’ through the central Appalachian basin from the Findlay arch, Sandusky County, Ohio, to the Valley and Ridge province, Hardy County, West Virginia: U.S. Geological
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Ryder, R.T., Swezey, C.S., Crangle, R.D., Jr., and Trippi, M.T., 2008, Geologic cross section E-E’ through the central Appalachian Basin from the Findlay Arch, Wood County, Ohio, to the Valley and Ridge Province, Pendleton County, West Virginia: U.S. Geological Survey Scientific Investigations Map
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Milici, R.C., and Swezey, C.S., 2014, Assessment of Appalachian Basin oil and gas resources: Devonian gas shales of the Devonian Shale-Middle and Upper Paleozoic Total Petroleum System, in Ruppert, L.F., and Ryder, R.T., eds., Coal and Petroleum Resources in the Appalachian Basin: Distribution,
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Prave, A.R., Duke, W.L., Slattery, W. (1996). A depositional model for storm- and tide-dominated prograding siliciclastic shorelines from the Middle Devonian of the central Appalachian foreland basin, USA. Sedimentology, 43,
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MacLachlan, D.B., Hoskins, D.M., Payne, D.F., (1995). Bedrock Geology of the Freeburg 7.5 minuet Quadrangle, Snyder County, Pennsylvania. ORF 95-04, The Pennsylvania Geologic Survey, Harrisburg, PA.
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fossils are scattered in massive sandstone beds throughout the rock unit, while the Sherman Ridge member is more laminated with fossilized ripple marks often indicating tidal current directions.
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sequences. The fine-grained rocks represent a shallow sea environment and accounts for many of the fossils. Coarser grained sediments represent near-shore environments, beaches, or possibly
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shale. Its upper contact is also conformable to the Trimmers Rock Formation and Harrell Shale. In 2012, Read and Erikson reported the formation as Givetian in Virginia.
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Gantz, Hundred-foot sand, Fifty-foot sand, Thirty-foot sand, Nineveh-Snee, Gordon Stray, Fourth Sand, Fifth Sand, Bayard Sand, Elizabeth Sand, Sweet Richard,
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Upper Warren, Lower Warren, Speechely Stray, Speechely, Balltown A, Balltown B, Balltown C, Sheffield, First Bradford, Second Bradford, Third Bradford, Kane
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lobes. These environments were tide-dominated and often had violent storms. The Montebello Sandstone member is an example of a storm dominated rock unit.
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Berg, T.M., Edmunds, W.E., Geyer, A.R. and others, compilers, (1980). Geologic Map of Pennsylvania: Pennsylvania Geologic Survey, Map 1, scale 1:250,000.
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Montebello Sandstone: Olive gray, fossiliferous, coarse to fine-grained sandstone, interbedded with siltstone and claystone, in coarsening upward cycles.
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Tully Limestone: a fossiliferous calcareous shale. The Tully is a conspicuous formation, which separates the Mahantango from the Hamilton Group.
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Berg, T.M., et al., (1983). Stratigraphic Correlation Chart of Pennsylvania: G75, Pennsylvania Geologic Survey, Harrisburg, Pennsylvania.
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In south-central Pennsylvania, the Mahantango includes the Clearville, Frame, Chaneysville, and Gander Run Members.
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Geologic Framework, and Geochemical Character: U.S. Geological Survey Professional Paper 1708, chapter G.9, 81p.
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U.S. Geological Survey Scientific Investigations Map SIM-3172, 2 sheets with 70-page pamphlet.
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The Mahantango represents a terrestrial to marine transition zone that went through many
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Sherman Ridge: Olive gray, fossiliferous, claystone and siltstone with interbedded fine
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in south central Pennsylvania, the lower members of this unit were also mapped as the
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Paleozoic Sedimentary Successions of the Virginia Valley & Ridge and Plateau
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Survey Scientific Investigations Map SIM-3067, 2 sheets with 52-page pamphlet.
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period, being deposited between 392 and 385 (±3) million years ago. It rests
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Fisher Ridge (also described as the Dalmatia and Turkey Ridge): silty
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The Mahantango Formation is typically found conformably overlying the
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1st Elk Sand, 2nd Elk Sand, 3rd Elk Sand, 4th Elk Sand, 5th Elk Sand
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There are numerous marine fossils found in the Mahantango including
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Chronostratigraphic context of the Mahantango Formation by state
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Relative age dating of the Mahantango places it in the Middle
342: 198: 1450: 247: 939:"Paleozoic Stratigraphic Column of Central Pennsylvania" 6046: 2586: 384:The Mahantango has been divided into four members: 337:
The Mahantango Formation is a gray, brown, and olive
4848: 1038: 901:Milici, Robert C.; Swezey, Christopher S. (2006). 885:http://pubs.usgs.gov/pp/1708/g9/pdf/pp1708_g9.pdf 7339: 812:. Pennsylvania Geological Survey. Archived from 313:counties in Pennsylvania. It is a member of the 896: 894: 892: 1445: 345:, characterized by coarsening-upward cycles. 6032: 4834: 2572: 1431: 1024: 801: 799: 405:, siltstone, and very fine-grained sandstone. 889: 792:https://pubs.er.usgs.gov/publication/sim3172 779:https://pubs.er.usgs.gov/publication/sim3067 766:https://pubs.er.usgs.gov/publication/sim2985 764:SIM-2985, 2 sheets with 48-page pamphlet. 720:Interpretation of Depositional Environments 6039: 6025: 4841: 4827: 2579: 2565: 1438: 1424: 1031: 1017: 796: 301:. It is named for the North branch of the 116: 7423:Devonian southern paleotemperate deposits 16:Geological formation in the United States 423: 352: 348: 837:Conlin, Richard R.; Hoskins, Donald M. 434:from an outcrop of the Mahantango near 409:The Sherman Ridge and Fisher Ridge are 7340: 3401:Lower Connoquenessing Sandstone Member 3379:Upper Connoquenessing Sandstone Member 7383:Shale formations of the United States 6020: 4822: 2560: 1419: 1012: 999: 7353:Geologic formations of Pennsylvania 931: 13: 2753:Middle Washington Limestone Member 839:Geologic Map of the Mifflintown Qd 14: 7434: 3028:Lower Pittsburgh Limestone Member 3018:Upper Pittsburgh Limestone Member 2763:Lower Washington Limestone Member 2738:Upper Washington Limestone Member 991: 7373:Devonian geology of Pennsylvania 7358:Devonian System of North America 3088:Lower Saltsburg Sandstone Member 3078:Upper Saltsburg Sandstone Member 2955:Lower Sewickley Sandstone Member 2944:Upper Sewickley Sandstone Member 841:(Map). 1:24,000. Cartography by 317:, along with the underlying the 159: 42: 7348:Geologic formations of Maryland 3197:Upper Freeport Limestone Member 3181:Upper Freeport Limestone Member 3139:Lower Mahoning Sandstone Member 3128:Upper Mahoning Sandstone Member 978: 967: 958: 922: 910:United States Geological Survey 843:United States Geological Survey 807:"Explanation of Geologic Units" 876: 867: 853: 847:Pennsylvania Geological Survey 830: 783: 770: 757: 656: 473: 332: 1: 3337:Lower Mercer Limestone Member 3327:Upper Mercer Limestone Member 751: 613: 517: 122:Outcrop of the Mahantango on 289:is a mapped bedrock unit in 7: 4094:Bobs Ridge Sandstone Member 3244:Kittanning Sandstone Member 3103:Bush Creek Limestone Member 3093:Pine Creek Limestone Member 3023:Little Pittsburgh coal seam 2951:"Meigis Creek" "No. 9 Coal" 2887:Waynesburg Limestone Member 739: 545: 505: 10: 7439: 5824:Pinesburg Station Dolomite 4185:Helderberg Group (geology) 4167:Helderberg Group (geology) 4149:Helderberg Group (geology) 3763:Huntley Mountain Formation 3227:Johnstone Limestone Member 3083:Woods Run Limestone Member 2965:Cedarville Sanstone Member 2960:Sewickley Limestone Member 2908:Uniontown Limestone Member 2743:Jollytown Limestone Member 587: 419: 7287: 7278: 7269: 7260: 7160: 7151: 7142: 7099: 7090: 7059: 7038: 7029: 6978: 6945: 6922: 6913: 6904: 6873: 6835: 6826: 6799: 6766: 6757: 6735: 6712: 6703: 6675: 6666: 6640: 6622: 6599: 6590: 6548: 6525: 6516: 6464: 6426: 6417: 6408: 6362: 6344: 6311: 6302: 6265: 6247: 6229: 6211: 6202: 6193: 6167: 6158: 6149: 6138: 6122: 6111: 6091: 6080: 6069: 6058: 5988: 5979: 5970: 5879: 5832: 5814: 5646: 5637: 5606: 5578: 5569: 5547: 5524: 5515: 5483: 5455: 5446: 5418: 5409: 5363: 5335: 5312: 5303: 5266: 5243: 5234: 5197: 5154: 5145: 5136: 5115: 5087: 5039: 4993: 4984: 4938: 4900: 4891: 4882: 4871: 4860: 4800: 4737: 4728: 4694: 4685: 4627: 4581: 4488: 4479: 4418: 4354: 4345: 4310: 4279: 4270: 4226: 4217: 4175: 4157: 4121: 4112: 4027: 3973: 3964: 3806: 3621: 3612: 3603: 3536: 3514: 3455: 3446: 3369:Connoquenessing Formation 3353: 3306:Homewood Sandstone Member 3202:Freeport Sandstone Member 3149: 2992: 2892:Uniontown Sanstone Member 2795: 2786: 2777: 2629: 2620: 2609: 2598: 2521: 2512: 2503: 2444: 2435: 2393: 2315: 2306: 2266: 2165: 2156: 2110: 2092: 2083: 2067: 2058: 2003: 1977: 1968: 1897: 1853: 1844: 1785: 1732: 1723: 1714: 1688: 1660: 1642: 1633: 1606: 1578: 1538: 1529: 1520: 1488: 1479: 1468: 1457: 1374: 1351: 1313: 1304: 1277: 1259: 1250: 1208: 1185: 1176: 1167: 1136: 1113: 1090: 1081: 1072: 1061: 1050: 1006: 270: 265: 239: 223: 218: 204: 194: 189: 179: 165: 155: 145: 135: 115: 26: 21: 5393:Wildcat Valley Sandstone 5355:Wildcat Valley Sandstone 3270:Vanport Limestone Member 3098:Buffalo Sandstone Member 2836:Middle Waynesburg Member 2413:Point Pleasant Formation 2290:Drowning Creek Formation 726:transgressive-regression 595: 7398:Shallow marine deposits 7224:Conococheague Formation 5899:Conococheague Limestone 5069:Little Valley Formation 4769:Pleasent Hill Formation 3186:Butler Sandstone Member 2976:Westone Sanstone Member 2877:Gilboy Sandstone Member 2846:Lower Waynesburg Member 2821:Upper Waynesburg Member 1361:Corriganville Limestone 746:Geology of Pennsylvania 592:Atactotoechus furcatus 6786:Williamsport Formation 6690:Bass Islands Formation 5862:Rockdale Run Formation 5731:Lincolnshire Formation 5676:Chatham Hill Formation 4963:Warren Point Formation 4236:Bass Islands Formation 3296:Beaver River Formation 3232:Middle Kittanning Coal 2897:Annabelle Shale Member 2882:Little Waynesburg Coal 2826:Little Washington Coal 1960:Tenmile Creek Dolomite 849:, Fourth Series. A126. 699: 447: 370: 7368:Devonian Pennsylvania 7177:Copper Ridge Dolomite 7108:Wells Creek Formation 7011:Martinsburg Formation 7006:Dolly Ridge Formation 6781:Wills Creek Formation 6221:Monongahela Formation 5904:Copper Ridge Dolomite 5776:Rich Valley Formation 5736:Martinsburg Formation 5616:Massanutten Sandstone 5588:Massanutten Sandstone 4591:Wells Creek Formation 4556:Linden Hall Formation 4401:Goat Island Formation 4007:Skaneateles Formation 3956:Murrysville Sandstone 3566:"Big Injun Sandstone" 3238:Lower Kittanning Coal 3222:Upper Kittanning Coal 3073:Upper Bakerstown coal 2970:Redstone-Pomeroy coal 2714:Upper Washington Coal 2423:Wells Creek Formation 2380:Waynesville Formation 2026:Bass Islands Dolomite 1105:Mauch Chunk Formation 861:"Geolex — Mahantango" 427: 377:, and underlying the 361:nomenclature for the 356: 349:Stratigraphic Setting 7393:Siltstone formations 7388:Limestone formations 7244:Waynesboro Formation 7121:Beekmantown Dolomite 6965:Reedsville Formation 6484:West Falls Formation 6290:Pocahontas Formation 5949:Waynesboro Formation 5867:Stonehenge Limestone 5842:Chepultepec Dolomite 5771:Reedsville Formation 5751:New Market Limestone 5493:Bloomsburg Formation 5465:Bloomsburg Formation 5253:Mahantango Formation 5054:Fort Payne Formation 5012:Cove Creek Formation 4774:Waynesboro Formation 4715:Gatesburgh Formation 4671:Stonehenge Formation 4617:Bellefonte Formation 4574:Loyalsburg Formation 4503:Reedsville Formation 4139:Bois Blanc Formation 4019:Mahantango Formation 3846:Lock Haven Formation 3827:Sherman Creek Member 3791:Sherman Creek Member 3636:Lock Haven Formation 3528:Loyalhanna Formation 3524:Greenbrier Limestone 3391:Quakertown Fire Clay 3211:Kittanning Formation 3033:Connellsville Member 2981:Pittsburgh coal seam 2939:Upper Sewickley Coal 2924:Pittsburgh Formation 2811:Waynesburg Formation 2728:Washington Formation 2700:Prosperity Limestone 2690:Claysville Limestone 2685:Fish Creek Sandstone 2542:Middle Run Formation 2459:Eau Claire Formation 2385:Whitewater Formation 2345:Grant Lake Formation 2275:Brassfield Formation 2258:Springfield Dolomite 2208:Cedarville Formation 2190:Goat Island Dolomite 2031:Bois Blanc Formation 2013:Holland Quarry Shale 1986:Amherstburg Dolomite 1907:Amherstburg Dolomite 1868:Mahantango Formation 1570:Pittsburgh Formation 1553:Waynesburg Formation 1508:Washington Formation 1366:Helderberg Formation 1323:Helderberg Formation 1269:Mahantango Formation 1123:Greenbrier Formation 1100:Greenbrier Formation 327:Montebello Formation 287:Mahantango Formation 174:West Falls Formation 140:Geological formation 22:Mahantango Formation 7308:Swift Run Formation 7082:St. Peter Sandstone 6988:Lexington Limestone 6883:Tuscarora Sandstone 6860:Rose Hill Formation 6727:Tonoloway Formation 6336:Bluefield Formation 6326:Princeton Sandstone 6321:Bluestone Formation 6285:New River Formation 6257:Allegheny Formation 5998:Swift Run Formation 5894:Conasauga Formation 5847:Kingsport Formation 5791:Ward Cove Limestone 5706:Five Oaks Limestone 5691:Eggleston Formation 5666:Blackford Formation 5621:Tuscarora Sandstone 5598:Tuscarora Sandstone 5593:Rose Hill Formation 5438:Tonoloway Limestone 5212:Foreknobs Formation 5179:Hampshire Formation 5169:Foreknobs Formation 5064:Hillsdale Formation 5032:Stony Gap Formation 5027:Princeton Formation 5007:Bluestone Formation 5002:Bluefield Formation 4930:Pikeville Formation 4498:Queenston Formation 4465:Tuscarora Formation 4444:Rose Hill Formation 4048:Marcellus Formation 3832:Irish Valley Member 3796:Irish Valley Member 3768:Hampshire Formation 3677:Chadakoin Formation 3656:Cussewago Formation 3641:Riceville Formation 3503:Bluefield Formation 3488:Princeton Formation 3483:Bluestone Formation 3421:Sharon Shale Member 3191:Lower Freeport Coal 3175:Upper Freeport Coal 3068:Pittsburgh Red Beds 3008:Casselman Formation 2914:Fulton Shale Member 2861:Uniontown Formation 2655:Windy Gap Limestone 2530:Swift Run Formation 2487:Mt. Simon Sandstone 2454:Conasauga Formation 2408:Lexington Limestone 2295:Manitoulin Dolomite 2143:Greenfield Dolomite 1996:Hillsboro Sandstone 1991:Detroit River Group 1927:Hillsboro Sandstone 1922:Detroit River Group 1752:Cussewago Sandstone 1593:Casselman Formation 1565:Uniontown Formation 1389:New Creek Limestone 1228:Greenland Gap Group 1223:Foreknobs Formation 1195:Hampshire Formation 1146:Purseland Sandstone 1128:Purseland Sandstone 946:Bucknell University 714:Marcellus Formation 375:Marcellus Formation 319:Marcellus Formation 184:Marcellus Formation 28:Stratigraphic range 7296:Catoctin Formation 7209:Weverton Formation 7199:Antietam Formation 7126:Rose Run Sandstone 7016:Nealmont Limestone 6850:McKenzie Formation 6814:McKenzie Formation 6791:McKenzie Formation 6632:Oriskany Sandstone 6614:Huntersville Chert 6578:Huntersville Chert 6568:Onondaga Limestone 6474:Brallier Formation 6456:Brallier Formation 6382:Maccrady Formation 6377:Cuyahoga Formation 6129:Igneous intrusives 6098:Igneous intrusives 6048:Chronostratigraphy 5954:Weverton Formation 5889:Antietam Formation 5852:Longview Limestone 5781:Rockdell Formation 5741:Moccasin Formation 5681:Edinburg Formation 5475:McKenzie Formation 5388:Ridgeley Sandstone 5383:Oriskany Sandstone 5350:Ridgeley Sandstone 5345:Oriskany Sandstone 5322:Huntersville Chert 5276:Huntersville Chert 5207:Brallier Formation 5174:Cloyd Conglomerate 5164:Brallier Formation 5097:Maccrady Formation 5074:Maccrady Formation 4958:Sewannee Formation 4948:Bee Rock Formation 4850:Chronostratigraphy 4784:Antietam Formation 4779:Tomstown Formation 4331:Syracuse Formation 4300:Camillus Formation 4144:Oriskany Formation 4131:Huntersville Chert 4084:Huntersville Chert 4057:Onondaga Limestone 3951:Knapp Conglomerate 3927:Penn Yan Formation 3841:Brallier Formation 3758:Rockwell Formation 3631:Brallier Formation 3587:Rockwell Formation 3546:Cuyahoga Formation 3465:Shenango Formation 3165:Freeport Formation 3112:Mahoning Formation 3052:Glenshaw Formation 2841:Waynesburg“A” coal 2831:Waynesburg“B” coal 2588:Chronostratigraphy 2340:Fairview Formation 2148:Tymochtee Dolomite 2046:Sylvania Sandstone 2041:Oriskany Sandstone 1955:Onondaga Limestone 1917:Delaware Limestone 1912:Columbus Limestone 1670:Cuyahoga Formation 1652:Maxville Limestone 1598:Glenshaw Formation 1447:Chronostratigraphy 1338:Oriskany Sandstone 1218:Brallier Formation 1200:Rockwell Formation 1151:Rockwell Formation 1040:Chronostratigraphy 536:(formerly Phacops) 495:Protoleptostrophia 448: 395:coarsening upward. 371: 323:Tuscarora Mountain 7363:Devonian Maryland 7335: 7334: 7329: 7328: 7325: 7324: 7321: 7320: 7313:Grenville Complex 7303: 7302: 7256: 7255: 7252: 7251: 7239:Tomstown Dolomite 7229:Elbrook Formation 7213:Loudoun Formation 7204:Harpers Formation 7189: 7188: 7185: 7184: 7138: 7137: 7134: 7133: 7077: 7076: 7052:Black River Group 7047:Trenton Limestone 7001: 7000: 6993:Trenton Limestone 6960:Juniata Formation 6937:Juniata Formation 6900: 6899: 6896: 6895: 6888:Clinton Sandstone 6845:Lockport Dolomite 6822: 6821: 6809:Lockport Dolomite 6753: 6752: 6662: 6661: 6658: 6657: 6586: 6585: 6512: 6511: 6504:Genesee Formation 6404: 6403: 6400: 6399: 6298: 6297: 6280:Kanawha Formation 6189: 6188: 6185: 6184: 6134: 6133: 6107: 6106: 6103: 6102: 6014: 6013: 6010: 6009: 6006: 6005: 5966: 5965: 5962: 5961: 5939:Tomstown Dolomite 5924:Harpers Formation 5919:Hampton Formation 5909:Elbrook Formation 5875: 5874: 5796:Wardell Formation 5786:Trenton Limestone 5746:Mosheim Limestone 5716:Juniata Formation 5711:Gratton Formation 5661:Benbolt Formation 5633: 5632: 5629: 5628: 5565: 5564: 5511: 5510: 5503:Lockport Dolomite 5405: 5404: 5401: 5400: 5299: 5298: 5230: 5229: 5132: 5131: 5128: 5127: 5079:Taggard Formation 4971: 4970: 4816: 4815: 4809:Grenville Complex 4796: 4795: 4792: 4791: 4764:Potsdam Formation 4759: 4758: 4755: 4754: 4747:Kinzers Formation 4720:Warrior Formation 4681: 4680: 4666:Nittany Formation 4650:Beekmantown Group 4605:Beekmantown Group 4545:Black River Group 4475: 4474: 4414: 4413: 4405:Gasport Formation 4396:Eramosa Formation 4341: 4340: 4213: 4212: 4209: 4208: 4199:Manlius Limestone 4108: 4107: 4012:Tichnor Formation 3946: 3945: 3869:Rhinestreet Shale 3739:Chagrin Formation 3599: 3598: 3595: 3594: 3564:Burgoon Formation 3472:Mauch Chunk Group 3442: 3441: 3342:Lower Mercer Coal 3332:Upper Mercer Coal 3281:Brookville Member 3253:Clarian Formation 3043:Birmingham Member 3038:Morgantown Member 2934:Benwood Limestone 2855:Monongahela Group 2773: 2772: 2680:Nineveh Limestone 2670:Nineveh Sandstone 2665:Gilmore Sandstone 2554: 2553: 2550: 2549: 2537: 2536: 2499: 2498: 2495: 2494: 2482: 2481: 2431: 2430: 2418:Trenton Limestone 2403:Black River Group 2375:Trenton Limestone 2355:Liberty Formation 2325:Arnheim Formation 2302: 2301: 2285:Clinton Formation 2223:Euphemia Dolomite 2198: 2197: 2133: 2132: 2054: 2053: 2021: 2020: 1940: 1939: 1836:Rhinestreet Shale 1809: 1808: 1710: 1709: 1706: 1705: 1629: 1628: 1560:Monongahela Group 1516: 1515: 1413: 1412: 1409: 1408: 1405: 1404: 1401: 1400: 1397: 1396: 1300: 1299: 1246: 1245: 1163: 1162: 1159: 1158: 819:on April 22, 2003 381:(where present). 367:Appalachian Basin 280: 279: 228:Appalachian Basin 7430: 7403:Deltaic deposits 7285: 7284: 7276: 7275: 7267: 7266: 7158: 7157: 7149: 7148: 7097: 7096: 7036: 7035: 7021:Oswego Formation 6955:Cincinnati Group 6932:Cincinnati Group 6920: 6919: 6911: 6910: 6855:Keefer Formation 6833: 6832: 6764: 6763: 6710: 6709: 6695:Keyser Formation 6685:Bertie Formation 6673: 6672: 6650:Helderberg Group 6597: 6596: 6523: 6522: 6494:Sonyea Formation 6424: 6423: 6415: 6414: 6354:Greenbrier Group 6331:Hinton Formation 6309: 6308: 6275:Pottsville Group 6209: 6208: 6200: 6199: 6165: 6164: 6156: 6155: 6147: 6146: 6142: 6120: 6119: 6115: 6089: 6088: 6084: 6078: 6077: 6073: 6067: 6066: 6062: 6041: 6034: 6027: 6018: 6017: 5986: 5985: 5977: 5976: 5944:Unicoi Formation 5806:Witten Formation 5801:Wassum Formation 5766:Paperville Shale 5761:Oswego Formation 5756:Oranda Formation 5726:Lenoir Formation 5701:Fetzer Limestone 5644: 5643: 5576: 5575: 5557:Keefer Sandstone 5534:Keefer Sandstone 5522: 5521: 5498:Keefer Sandstone 5470:Keefer Sandstone 5453: 5452: 5433:Keyser Limestone 5428:Hancock Dolomite 5416: 5415: 5378:Keyser Limestone 5373:Helderberg Group 5310: 5309: 5281:Tioga Bentonites 5241: 5240: 5152: 5151: 5143: 5142: 5120:Pocono Formation 5059:Gasper Formation 5049:Denmar Formation 5022:Hinton Formation 4991: 4990: 4915:Grundy Formation 4898: 4897: 4889: 4888: 4880: 4879: 4875: 4869: 4868: 4864: 4843: 4836: 4829: 4820: 4819: 4735: 4734: 4692: 4691: 4661:Axeman Formation 4566:Hatter Formation 4561:Snyder Formation 4536:Rodman Formation 4531:Salona Formation 4526:Coburn Formation 4486: 4485: 4392:Guelph Formation 4375:Vernon Formation 4352: 4351: 4277: 4276: 4260:Bertie Formation 4224: 4223: 4194:Keyser Formation 4119: 4118: 4002:Ludlow Formation 3997:Moscow Formation 3971: 3970: 3922:West River Shale 3864:Angola Formation 3853:West Falls Group 3786:Duncannon Member 3646:Oswayo Formation 3619: 3618: 3610: 3609: 3498:Maxton Sandstone 3493:Hinton Formation 3453: 3452: 3432:Sharon Sandstone 3410:Sharon Formation 3396:Quakertown Shale 3363:Pottsville Group 3316:Mercer Formation 3290:Pottsville Group 2793: 2792: 2784: 2783: 2710:Donley Limestone 2645:Greene Formation 2627: 2626: 2618: 2617: 2613: 2607: 2606: 2602: 2581: 2574: 2567: 2558: 2557: 2519: 2518: 2510: 2509: 2464:Kerbel Formation 2442: 2441: 2370:Saluda Formation 2335:Drakes Formation 2330:Cincinnati Group 2313: 2312: 2280:Cabot Head Shale 2248:Peebles Dolomite 2233:Lilley Formation 2228:Laurel Limestone 2213:Dayton Formation 2203:Bisher Formation 2180:Gasport Dolomite 2163: 2162: 2090: 2089: 2076:Bertie Formation 2065: 2064: 2036:Helderberg Group 1975: 1974: 1945:Dundee Formation 1889:Silica Formation 1879:Plum Brook Shale 1851: 1850: 1826:West Falls Group 1730: 1729: 1721: 1720: 1640: 1639: 1621:Pottsville Group 1536: 1535: 1527: 1526: 1503:Greene Formation 1486: 1485: 1477: 1476: 1472: 1466: 1465: 1461: 1440: 1433: 1426: 1417: 1416: 1384:Keyser Limestone 1311: 1310: 1257: 1256: 1238:Scherr Formation 1183: 1182: 1174: 1173: 1088: 1087: 1079: 1078: 1070: 1069: 1065: 1059: 1058: 1054: 1033: 1026: 1019: 1010: 1009: 997: 996: 986: 982: 976: 971: 965: 962: 956: 955: 953: 952: 943: 935: 929: 926: 920: 919: 917: 916: 907: 898: 887: 880: 874: 871: 865: 864: 857: 851: 850: 834: 828: 827: 825: 824: 818: 811: 803: 794: 787: 781: 774: 768: 761: 444:schizochroal eye 321:Shale. South of 303:Mahantango Creek 275:Mahantango Creek 160:See: Description 120: 111: 41: 19: 18: 7438: 7437: 7433: 7432: 7431: 7429: 7428: 7427: 7338: 7337: 7336: 7331: 7330: 7317: 7299: 7248: 7219:Conasauga Group 7194:Chilhowee Group 7181: 7130: 7086: 7073: 7055: 7025: 6997: 6974: 6941: 6892: 6869: 6865:Rochester Shale 6818: 6795: 6749: 6731: 6699: 6654: 6636: 6618: 6582: 6563:Marcellus Shale 6544: 6535:Tully Limestone 6508: 6460: 6441:Berea Sandstone 6436:Price Formation 6396: 6392:Berea Sandstone 6372:Price Formation 6358: 6340: 6294: 6261: 6243: 6239:Conemaugh Group 6225: 6181: 6140: 6130: 6113: 6099: 6082: 6071: 6060: 6054: 6045: 6015: 6002: 5958: 5914:Erwin Formation 5871: 5857:Mascot Dolomite 5828: 5810: 5721:Knobs Formation 5696:Elway Limestone 5686:Effna Limestone 5671:Bowen Formation 5625: 5602: 5561: 5543: 5539:Rochester Shale 5507: 5479: 5442: 5397: 5359: 5331: 5295: 5286:Marcellus Shale 5262: 5226: 5222:Pound Formation 5193: 5189:Pound Formation 5124: 5111: 5102:Price Formation 5083: 5035: 4980: 4967: 4934: 4920:Hyden Formation 4873: 4862: 4856: 4847: 4817: 4812: 4788: 4751: 4724: 4706:Knox Supergroup 4677: 4637:Knox Supergroup 4623: 4600:Knox Supergroup 4577: 4471: 4439:Rochester Shale 4410: 4337: 4306: 4266: 4243: 4241:Akron Formation 4205: 4171: 4153: 4104: 4023: 3981:Tully Limestone 3960: 3942: 3894:Middlesex Shale 3802: 3734:Cleveland Shale 3591: 3575:Berea Sandstone 3532: 3510: 3438: 3385:Quakertown Coal 3381:"2nd Salt Sand" 3367: 3349: 3308:"1st Salt Sand" 3294: 3275:Brookville Coal 3163: 3159:Allegheny Group 3145: 3123:Bush Creek Coal 3006: 3002:Conemaugh Group 2988: 2922: 2871:Waynesburg coal 2859: 2809: 2769: 2758:Washington Coal 2726: 2718:Rockport Member 2643: 2611: 2600: 2594: 2585: 2555: 2546: 2533: 2491: 2478: 2427: 2389: 2365:Queenston Shale 2360:Miamitown Shale 2298: 2262: 2253:Rochester Shale 2194: 2185:Guelph Dolomite 2152: 2129: 2125:Guelph Dolomite 2106: 2079: 2050: 2017: 1999: 1964: 1936: 1932:Marcellus Shale 1893: 1884:Prout Limestone 1873:Olentangy Shale 1863:Tully Formation 1840: 1805: 1800:Olentangy Shale 1781: 1766:Cleveland Shale 1747:Berea Sandstone 1702: 1698:Rushville Shale 1693:Coldwater Shale 1684: 1675:Logan Formation 1656: 1625: 1616:Allegheny Group 1602: 1588:Conemaugh Group 1574: 1512: 1470: 1459: 1453: 1444: 1414: 1393: 1370: 1347: 1296: 1287:Marcellus Shale 1273: 1242: 1204: 1155: 1132: 1109: 1063: 1052: 1046: 1037: 1002: 994: 989: 983: 979: 972: 968: 963: 959: 950: 948: 941: 937: 936: 932: 927: 923: 914: 912: 905: 899: 890: 881: 877: 872: 868: 859: 858: 854: 835: 831: 822: 820: 816: 809: 805: 804: 797: 788: 784: 775: 771: 762: 758: 754: 742: 722: 702: 659: 646:Paleozygopleura 616: 598: 590: 548: 520: 508: 476: 422: 379:Tully Limestone 363:Middle Devonian 351: 335: 231: 131: 110: 109: 108: 107: 102: 97: 92: 87: 82: 77: 72: 67: 62: 57: 52: 47: 36: 35: 17: 12: 11: 5: 7436: 7426: 7425: 7420: 7415: 7413:Tidal deposits 7410: 7408:Beach deposits 7405: 7400: 7395: 7390: 7385: 7380: 7378:Givetian Stage 7375: 7370: 7365: 7360: 7355: 7350: 7333: 7332: 7327: 7326: 7323: 7322: 7319: 7318: 7316: 7315: 7310: 7304: 7301: 7300: 7298: 7293: 7291: 7282: 7273: 7264: 7258: 7257: 7254: 7253: 7250: 7249: 7247: 7246: 7241: 7236: 7231: 7226: 7221: 7215: 7214: 7211: 7206: 7201: 7196: 7190: 7187: 7186: 7183: 7182: 7180: 7179: 7173: 7172: 7166: 7164: 7155: 7146: 7140: 7139: 7136: 7135: 7132: 7131: 7129: 7128: 7123: 7117: 7116: 7110: 7105: 7103: 7094: 7088: 7087: 7085: 7084: 7078: 7075: 7074: 7072: 7071: 7069:St. Paul Group 7065: 7063: 7057: 7056: 7054: 7049: 7044: 7042: 7033: 7027: 7026: 7024: 7023: 7018: 7013: 7008: 7002: 6999: 6998: 6996: 6995: 6990: 6984: 6982: 6976: 6975: 6973: 6972: 6967: 6962: 6957: 6951: 6949: 6943: 6942: 6940: 6939: 6934: 6928: 6926: 6917: 6908: 6902: 6901: 6898: 6897: 6894: 6893: 6891: 6890: 6885: 6879: 6877: 6871: 6870: 6868: 6867: 6862: 6857: 6852: 6847: 6841: 6839: 6830: 6824: 6823: 6820: 6819: 6817: 6816: 6811: 6805: 6803: 6797: 6796: 6794: 6793: 6788: 6783: 6778: 6772: 6770: 6761: 6755: 6754: 6751: 6750: 6748: 6747: 6741: 6739: 6733: 6732: 6730: 6729: 6724: 6718: 6716: 6707: 6701: 6700: 6698: 6697: 6692: 6687: 6681: 6679: 6670: 6664: 6663: 6660: 6659: 6656: 6655: 6653: 6652: 6646: 6644: 6638: 6637: 6635: 6634: 6628: 6626: 6620: 6619: 6617: 6616: 6611: 6609:Needmore Shale 6605: 6603: 6594: 6588: 6587: 6584: 6583: 6581: 6580: 6575: 6573:Needmore Shale 6570: 6565: 6560: 6558:Hamilton Group 6554: 6552: 6546: 6545: 6543: 6542: 6540:Hamilton Group 6537: 6531: 6529: 6520: 6514: 6513: 6510: 6509: 6507: 6506: 6501: 6496: 6491: 6486: 6481: 6479:Java Formation 6476: 6470: 6468: 6462: 6461: 6459: 6458: 6453: 6448: 6443: 6438: 6432: 6430: 6421: 6412: 6406: 6405: 6402: 6401: 6398: 6397: 6395: 6394: 6389: 6384: 6379: 6374: 6368: 6366: 6360: 6359: 6357: 6356: 6350: 6348: 6342: 6341: 6339: 6338: 6333: 6328: 6323: 6317: 6315: 6306: 6300: 6299: 6296: 6295: 6293: 6292: 6287: 6282: 6277: 6271: 6269: 6263: 6262: 6260: 6259: 6253: 6251: 6245: 6244: 6242: 6241: 6235: 6233: 6227: 6226: 6224: 6223: 6217: 6215: 6206: 6197: 6191: 6190: 6187: 6186: 6183: 6182: 6180: 6179: 6173: 6171: 6162: 6153: 6144: 6136: 6135: 6132: 6131: 6128: 6126: 6117: 6109: 6108: 6105: 6104: 6101: 6100: 6097: 6095: 6086: 6075: 6064: 6056: 6055: 6044: 6043: 6036: 6029: 6021: 6012: 6011: 6008: 6007: 6004: 6003: 6001: 6000: 5994: 5992: 5983: 5974: 5968: 5967: 5964: 5963: 5960: 5959: 5957: 5956: 5951: 5946: 5941: 5936: 5934:Shady Dolomite 5931: 5929:Rome Formation 5926: 5921: 5916: 5911: 5906: 5901: 5896: 5891: 5885: 5883: 5877: 5876: 5873: 5872: 5870: 5869: 5864: 5859: 5854: 5849: 5844: 5838: 5836: 5830: 5829: 5827: 5826: 5820: 5818: 5812: 5811: 5809: 5808: 5803: 5798: 5793: 5788: 5783: 5778: 5773: 5768: 5763: 5758: 5753: 5748: 5743: 5738: 5733: 5728: 5723: 5718: 5713: 5708: 5703: 5698: 5693: 5688: 5683: 5678: 5673: 5668: 5663: 5658: 5656:Bays Formation 5652: 5650: 5641: 5635: 5634: 5631: 5630: 5627: 5626: 5624: 5623: 5618: 5612: 5610: 5604: 5603: 5601: 5600: 5595: 5590: 5584: 5582: 5573: 5567: 5566: 5563: 5562: 5560: 5559: 5553: 5551: 5545: 5544: 5542: 5541: 5536: 5530: 5528: 5519: 5513: 5512: 5509: 5508: 5506: 5505: 5500: 5495: 5489: 5487: 5481: 5480: 5478: 5477: 5472: 5467: 5461: 5459: 5450: 5444: 5443: 5441: 5440: 5435: 5430: 5424: 5422: 5413: 5407: 5406: 5403: 5402: 5399: 5398: 5396: 5395: 5390: 5385: 5380: 5375: 5369: 5367: 5361: 5360: 5358: 5357: 5352: 5347: 5341: 5339: 5333: 5332: 5330: 5329: 5327:Needmore Shale 5324: 5318: 5316: 5307: 5301: 5300: 5297: 5296: 5294: 5293: 5291:Millboro Shale 5288: 5283: 5278: 5272: 5270: 5264: 5263: 5261: 5260: 5258:Millboro Shale 5255: 5249: 5247: 5238: 5232: 5231: 5228: 5227: 5225: 5224: 5219: 5217:Millboro Shale 5214: 5209: 5203: 5201: 5195: 5194: 5192: 5191: 5186: 5184:Millboro Shale 5181: 5176: 5171: 5166: 5160: 5158: 5149: 5140: 5134: 5133: 5130: 5129: 5126: 5125: 5123: 5122: 5116: 5113: 5112: 5110: 5109: 5104: 5099: 5093: 5091: 5085: 5084: 5082: 5081: 5076: 5071: 5066: 5061: 5056: 5051: 5045: 5043: 5037: 5036: 5034: 5029: 5024: 5019: 5017:Fido Sandstone 5014: 5009: 5004: 4999: 4997: 4988: 4982: 4981: 4979: 4978: 4972: 4969: 4968: 4966: 4965: 4960: 4955: 4950: 4944: 4942: 4936: 4935: 4933: 4932: 4927: 4925:Kendrick Shale 4922: 4917: 4912: 4906: 4904: 4895: 4886: 4877: 4866: 4858: 4857: 4846: 4845: 4838: 4831: 4823: 4814: 4813: 4811: 4806: 4804: 4798: 4797: 4794: 4793: 4790: 4789: 4787: 4786: 4781: 4776: 4771: 4766: 4760: 4757: 4756: 4753: 4752: 4750: 4749: 4743: 4741: 4732: 4726: 4725: 4723: 4722: 4717: 4711: 4710: 4709: 4708: 4700: 4698: 4689: 4683: 4682: 4679: 4678: 4676: 4675: 4674: 4673: 4668: 4663: 4655: 4654: 4652: 4646: 4645: 4644: 4643: 4639: 4633: 4631: 4625: 4624: 4622: 4621: 4620: 4619: 4611: 4610: 4609: 4608: 4602: 4594: 4593: 4587: 4585: 4579: 4578: 4571: 4570: 4569: 4568: 4563: 4558: 4550: 4549: 4547: 4541: 4540: 4539: 4538: 4533: 4528: 4520: 4519: 4517: 4511: 4510: 4505: 4500: 4494: 4492: 4483: 4477: 4476: 4473: 4472: 4470: 4469: 4468: 4467: 4459: 4458: 4456: 4450: 4449: 4448: 4447: 4441: 4433: 4432: 4430: 4424: 4422: 4416: 4415: 4412: 4411: 4409: 4408: 4407: 4406: 4403: 4398: 4393: 4387: 4386: 4384:Lockport Group 4380: 4379: 4378: 4377: 4369: 4368: 4366: 4360: 4358: 4349: 4343: 4342: 4339: 4338: 4336: 4335: 4334: 4333: 4325: 4324: 4322: 4316: 4314: 4308: 4307: 4305: 4304: 4303: 4302: 4294: 4293: 4291: 4285: 4283: 4274: 4268: 4267: 4265: 4264: 4263: 4262: 4254: 4253: 4251: 4245: 4244: 4238: 4232: 4230: 4221: 4215: 4214: 4211: 4210: 4207: 4206: 4204: 4203: 4202: 4201: 4196: 4188: 4187: 4181: 4179: 4173: 4172: 4170: 4169: 4163: 4161: 4155: 4154: 4152: 4151: 4146: 4141: 4135:Needmore Shale 4127: 4125: 4116: 4110: 4109: 4106: 4105: 4103: 4102: 4100:Needmore Shale 4097: 4096: 4095: 4089: 4088: 4087: 4086: 4078: 4077: 4076: 4075: 4072: 4069: 4066: 4060: 4059: 4053: 4052: 4051: 4050: 4042: 4041: 4039: 4037:Hamilton Group 4033: 4031: 4025: 4024: 4022: 4021: 4016: 4015: 4014: 4009: 4004: 3999: 3991: 3990: 3988: 3986:Hamilton Group 3979: 3977: 3968: 3962: 3961: 3959: 3958: 3953: 3947: 3944: 3943: 3941: 3940: 3939: 3938: 3929: 3924: 3916: 3915: 3914: 3913: 3909: 3899: 3898: 3897: 3896: 3891: 3889:Cashaqua Shale 3883: 3882: 3880: 3874: 3873: 3872: 3871: 3866: 3858: 3857: 3855: 3849: 3848: 3843: 3837: 3836: 3835: 3834: 3829: 3821: 3820: 3818: 3816:Catskill Group 3812: 3810: 3804: 3803: 3801: 3800: 3799: 3798: 3793: 3788: 3780: 3779: 3777: 3775:Catskill Group 3771: 3770: 3765: 3760: 3755: 3753:Java Formation 3749: 3748: 3747: 3746: 3741: 3736: 3728: 3727: 3725: 3719: 3718: 3717: 3716: 3710: 3709: 3707: 3701: 3700: 3699: 3698: 3692: 3691: 3689: 3687:Bradford Group 3683: 3682: 3681: 3680: 3679:, First Warren 3674: 3668: 3667: 3665: 3659: 3658: 3653: 3648: 3643: 3638: 3633: 3627: 3625: 3616: 3607: 3601: 3600: 3597: 3596: 3593: 3592: 3590: 3589: 3584: 3583: 3582: 3577: 3572: 3567: 3558: 3557: 3555: 3549: 3548: 3542: 3540: 3534: 3533: 3531: 3530: 3520: 3518: 3512: 3511: 3509: 3508: 3507: 3506: 3500: 3495: 3490: 3485: 3477: 3476: 3474: 3468: 3467: 3461: 3459: 3450: 3444: 3443: 3440: 3439: 3437: 3436: 3435: 3434: 3429: 3423: 3415: 3414: 3412: 3406: 3405: 3404: 3403: 3398: 3393: 3388: 3382: 3373: 3372: 3365: 3359: 3357: 3351: 3350: 3348: 3347: 3346: 3345: 3339: 3334: 3329: 3321: 3320: 3318: 3312: 3311: 3310: 3309: 3300: 3299: 3292: 3286: 3285: 3284: 3283: 3278: 3272: 3267: 3258: 3257: 3255: 3249: 3248: 3247: 3246: 3241: 3235: 3229: 3224: 3216: 3215: 3213: 3207: 3206: 3205: 3204: 3199: 3194: 3188: 3183: 3178: 3169: 3168: 3161: 3155: 3153: 3147: 3146: 3144: 3143: 3142: 3141: 3136: 3130: 3125: 3117: 3116: 3114: 3108: 3107: 3106: 3105: 3100: 3095: 3090: 3085: 3080: 3075: 3070: 3065: 3063:Ames Limestone 3057: 3056: 3054: 3048: 3047: 3046: 3045: 3040: 3035: 3030: 3025: 3020: 3012: 3011: 3004: 2998: 2996: 2990: 2989: 2987: 2986: 2985: 2984: 2978: 2973: 2967: 2962: 2957: 2952: 2949:Sewickley Coal 2946: 2941: 2936: 2928: 2927: 2919: 2918: 2917: 2916: 2911: 2905: 2902:Uniontown Coal 2899: 2894: 2889: 2884: 2879: 2874: 2865: 2864: 2857: 2851: 2850: 2849: 2848: 2843: 2838: 2833: 2828: 2823: 2815: 2814: 2807: 2801: 2799: 2790: 2781: 2775: 2774: 2771: 2770: 2768: 2767: 2766: 2765: 2760: 2755: 2750: 2748:Jollytown Coal 2745: 2740: 2732: 2731: 2723: 2722: 2721: 2720: 2715: 2712: 2707: 2702: 2697: 2692: 2687: 2682: 2677: 2672: 2667: 2662: 2660:Windy Gap Coal 2657: 2649: 2648: 2641: 2635: 2633: 2624: 2615: 2604: 2596: 2595: 2584: 2583: 2576: 2569: 2561: 2552: 2551: 2548: 2547: 2545: 2544: 2538: 2535: 2534: 2532: 2527: 2525: 2516: 2507: 2501: 2500: 2497: 2496: 2493: 2492: 2490: 2489: 2483: 2480: 2479: 2477: 2476: 2474:Rome Formation 2471: 2466: 2461: 2456: 2450: 2448: 2439: 2433: 2432: 2429: 2428: 2426: 2425: 2420: 2415: 2410: 2405: 2399: 2397: 2391: 2390: 2388: 2387: 2382: 2377: 2372: 2367: 2362: 2357: 2352: 2350:Kope Formation 2347: 2342: 2337: 2332: 2327: 2321: 2319: 2310: 2304: 2303: 2300: 2299: 2297: 2292: 2287: 2282: 2277: 2272: 2270: 2264: 2263: 2261: 2260: 2255: 2250: 2245: 2240: 2235: 2230: 2225: 2220: 2215: 2210: 2205: 2199: 2196: 2195: 2193: 2192: 2187: 2182: 2177: 2175:Lockport Group 2171: 2169: 2160: 2154: 2153: 2151: 2150: 2145: 2140: 2134: 2131: 2130: 2128: 2127: 2122: 2116: 2114: 2108: 2107: 2105: 2104: 2098: 2096: 2087: 2081: 2080: 2078: 2073: 2071: 2062: 2056: 2055: 2052: 2051: 2049: 2048: 2043: 2038: 2033: 2028: 2022: 2019: 2018: 2016: 2015: 2009: 2007: 2001: 2000: 1998: 1993: 1988: 1983: 1981: 1972: 1966: 1965: 1963: 1962: 1957: 1952: 1950:Lucas Dolomite 1947: 1941: 1938: 1937: 1935: 1934: 1929: 1924: 1919: 1914: 1909: 1903: 1901: 1895: 1894: 1892: 1891: 1886: 1881: 1876: 1870: 1865: 1859: 1857: 1848: 1842: 1841: 1839: 1838: 1833: 1828: 1822: 1821: 1819:Java Formation 1816: 1810: 1807: 1806: 1804: 1803: 1797: 1791: 1789: 1783: 1782: 1780: 1779: 1773: 1768: 1762: 1761: 1755: 1754: 1749: 1744: 1738: 1736: 1727: 1718: 1712: 1711: 1708: 1707: 1704: 1703: 1701: 1700: 1695: 1689: 1686: 1685: 1683: 1682: 1677: 1672: 1666: 1664: 1658: 1657: 1655: 1654: 1648: 1646: 1637: 1631: 1630: 1627: 1626: 1624: 1623: 1618: 1612: 1610: 1604: 1603: 1601: 1600: 1595: 1590: 1584: 1582: 1576: 1575: 1573: 1572: 1567: 1562: 1556: 1555: 1550: 1544: 1542: 1533: 1524: 1518: 1517: 1514: 1513: 1511: 1510: 1505: 1500: 1494: 1492: 1483: 1474: 1463: 1455: 1454: 1443: 1442: 1435: 1428: 1420: 1411: 1410: 1407: 1406: 1403: 1402: 1399: 1398: 1395: 1394: 1392: 1391: 1386: 1380: 1378: 1372: 1371: 1369: 1368: 1363: 1357: 1355: 1349: 1348: 1346: 1345: 1340: 1335: 1333:Needmore Shale 1330: 1325: 1319: 1317: 1308: 1302: 1301: 1298: 1297: 1295: 1294: 1292:Needmore Shale 1289: 1283: 1281: 1275: 1274: 1272: 1271: 1265: 1263: 1254: 1248: 1247: 1244: 1243: 1241: 1240: 1235: 1230: 1225: 1220: 1214: 1212: 1206: 1205: 1203: 1202: 1197: 1191: 1189: 1180: 1171: 1165: 1164: 1161: 1160: 1157: 1156: 1154: 1153: 1148: 1142: 1140: 1134: 1133: 1131: 1130: 1125: 1119: 1117: 1111: 1110: 1108: 1107: 1102: 1096: 1094: 1085: 1076: 1067: 1056: 1048: 1047: 1036: 1035: 1028: 1021: 1013: 1007: 1004: 1003: 993: 992:External links 990: 988: 987: 977: 966: 957: 930: 921: 888: 875: 866: 852: 829: 795: 782: 769: 755: 753: 750: 749: 748: 741: 738: 721: 718: 701: 698: 697: 696: 690: 685: 680: 678:Michelinoceras 675: 670: 665: 658: 655: 654: 653: 648: 643: 638: 633: 627: 622: 615: 612: 611: 610: 604: 597: 594: 589: 586: 585: 584: 579: 574: 569: 564: 559: 554: 547: 544: 543: 542: 537: 531: 526: 524:Basidechenella 519: 516: 515: 514: 507: 504: 503: 502: 497: 492: 487: 482: 475: 472: 421: 418: 407: 406: 399: 396: 389: 365:strata in the 350: 347: 334: 331: 315:Hamilton Group 278: 277: 272: 268: 267: 263: 262: 241: 237: 236: 225: 221: 220: 216: 215: 206: 202: 201: 196: 192: 191: 187: 186: 181: 177: 176: 167: 163: 162: 157: 153: 152: 150:Hamilton Group 147: 143: 142: 137: 133: 132: 130:, Pennsylvania 121: 113: 112: 105: 104: 103: 98: 93: 88: 83: 78: 73: 68: 63: 58: 53: 48: 43: 24: 23: 15: 9: 6: 4: 3: 2: 7435: 7424: 7421: 7419: 7418:Cliff-formers 7416: 7414: 7411: 7409: 7406: 7404: 7401: 7399: 7396: 7394: 7391: 7389: 7386: 7384: 7381: 7379: 7376: 7374: 7371: 7369: 7366: 7364: 7361: 7359: 7356: 7354: 7351: 7349: 7346: 7345: 7343: 7314: 7311: 7309: 7306: 7305: 7297: 7294: 7292: 7290: 7286: 7283: 7281: 7277: 7274: 7272: 7268: 7265: 7263: 7259: 7245: 7242: 7240: 7237: 7235: 7232: 7230: 7227: 7225: 7222: 7220: 7217: 7216: 7212: 7210: 7207: 7205: 7202: 7200: 7197: 7195: 7192: 7191: 7178: 7175: 7174: 7171: 7168: 7167: 7165: 7163: 7159: 7156: 7154: 7150: 7147: 7145: 7141: 7127: 7124: 7122: 7119: 7118: 7115: 7112: 7111: 7109: 7106: 7104: 7102: 7098: 7095: 7093: 7089: 7083: 7080: 7079: 7070: 7067: 7066: 7064: 7062: 7058: 7053: 7050: 7048: 7045: 7043: 7041: 7037: 7034: 7032: 7028: 7022: 7019: 7017: 7014: 7012: 7009: 7007: 7004: 7003: 6994: 6991: 6989: 6986: 6985: 6983: 6981: 6977: 6971: 6968: 6966: 6963: 6961: 6958: 6956: 6953: 6952: 6950: 6948: 6944: 6938: 6935: 6933: 6930: 6929: 6927: 6925: 6921: 6918: 6916: 6912: 6909: 6907: 6903: 6889: 6886: 6884: 6881: 6880: 6878: 6876: 6872: 6866: 6863: 6861: 6858: 6856: 6853: 6851: 6848: 6846: 6843: 6842: 6840: 6838: 6834: 6831: 6829: 6825: 6815: 6812: 6810: 6807: 6806: 6804: 6802: 6798: 6792: 6789: 6787: 6784: 6782: 6779: 6777: 6774: 6773: 6771: 6769: 6765: 6762: 6760: 6756: 6746: 6743: 6742: 6740: 6738: 6734: 6728: 6725: 6723: 6720: 6719: 6717: 6715: 6711: 6708: 6706: 6702: 6696: 6693: 6691: 6688: 6686: 6683: 6682: 6680: 6678: 6674: 6671: 6669: 6665: 6651: 6648: 6647: 6645: 6643: 6639: 6633: 6630: 6629: 6627: 6625: 6621: 6615: 6612: 6610: 6607: 6606: 6604: 6602: 6598: 6595: 6593: 6589: 6579: 6576: 6574: 6571: 6569: 6566: 6564: 6561: 6559: 6556: 6555: 6553: 6551: 6547: 6541: 6538: 6536: 6533: 6532: 6530: 6528: 6524: 6521: 6519: 6515: 6505: 6502: 6500: 6499:Harrell Shale 6497: 6495: 6492: 6490: 6487: 6485: 6482: 6480: 6477: 6475: 6472: 6471: 6469: 6467: 6463: 6457: 6454: 6452: 6449: 6447: 6446:Bedford Shale 6444: 6442: 6439: 6437: 6434: 6433: 6431: 6429: 6425: 6422: 6420: 6416: 6413: 6411: 6407: 6393: 6390: 6388: 6387:Sunbury Shale 6385: 6383: 6380: 6378: 6375: 6373: 6370: 6369: 6367: 6365: 6361: 6355: 6352: 6351: 6349: 6347: 6343: 6337: 6334: 6332: 6329: 6327: 6324: 6322: 6319: 6318: 6316: 6314: 6310: 6307: 6305: 6301: 6291: 6288: 6286: 6283: 6281: 6278: 6276: 6273: 6272: 6270: 6268: 6264: 6258: 6255: 6254: 6252: 6250: 6246: 6240: 6237: 6236: 6234: 6232: 6228: 6222: 6219: 6218: 6216: 6214: 6210: 6207: 6205: 6201: 6198: 6196: 6192: 6178: 6177:Dunkard Group 6175: 6174: 6172: 6170: 6166: 6163: 6161: 6157: 6154: 6152: 6148: 6145: 6143: 6137: 6127: 6125: 6121: 6118: 6116: 6110: 6096: 6094: 6090: 6087: 6085: 6079: 6076: 6074: 6068: 6065: 6063: 6057: 6053: 6052:West Virginia 6049: 6042: 6037: 6035: 6030: 6028: 6023: 6022: 6019: 5999: 5996: 5995: 5993: 5991: 5987: 5984: 5982: 5978: 5975: 5973: 5969: 5955: 5952: 5950: 5947: 5945: 5942: 5940: 5937: 5935: 5932: 5930: 5927: 5925: 5922: 5920: 5917: 5915: 5912: 5910: 5907: 5905: 5902: 5900: 5897: 5895: 5892: 5890: 5887: 5886: 5884: 5882: 5878: 5868: 5865: 5863: 5860: 5858: 5855: 5853: 5850: 5848: 5845: 5843: 5840: 5839: 5837: 5835: 5831: 5825: 5822: 5821: 5819: 5817: 5813: 5807: 5804: 5802: 5799: 5797: 5794: 5792: 5789: 5787: 5784: 5782: 5779: 5777: 5774: 5772: 5769: 5767: 5764: 5762: 5759: 5757: 5754: 5752: 5749: 5747: 5744: 5742: 5739: 5737: 5734: 5732: 5729: 5727: 5724: 5722: 5719: 5717: 5714: 5712: 5709: 5707: 5704: 5702: 5699: 5697: 5694: 5692: 5689: 5687: 5684: 5682: 5679: 5677: 5674: 5672: 5669: 5667: 5664: 5662: 5659: 5657: 5654: 5653: 5651: 5649: 5645: 5642: 5640: 5636: 5622: 5619: 5617: 5614: 5613: 5611: 5609: 5605: 5599: 5596: 5594: 5591: 5589: 5586: 5585: 5583: 5581: 5577: 5574: 5572: 5568: 5558: 5555: 5554: 5552: 5550: 5546: 5540: 5537: 5535: 5532: 5531: 5529: 5527: 5523: 5520: 5518: 5514: 5504: 5501: 5499: 5496: 5494: 5491: 5490: 5488: 5486: 5482: 5476: 5473: 5471: 5468: 5466: 5463: 5462: 5460: 5458: 5454: 5451: 5449: 5445: 5439: 5436: 5434: 5431: 5429: 5426: 5425: 5423: 5421: 5417: 5414: 5412: 5408: 5394: 5391: 5389: 5386: 5384: 5381: 5379: 5376: 5374: 5371: 5370: 5368: 5366: 5362: 5356: 5353: 5351: 5348: 5346: 5343: 5342: 5340: 5338: 5334: 5328: 5325: 5323: 5320: 5319: 5317: 5315: 5311: 5308: 5306: 5302: 5292: 5289: 5287: 5284: 5282: 5279: 5277: 5274: 5273: 5271: 5269: 5265: 5259: 5256: 5254: 5251: 5250: 5248: 5246: 5242: 5239: 5237: 5233: 5223: 5220: 5218: 5215: 5213: 5210: 5208: 5205: 5204: 5202: 5200: 5196: 5190: 5187: 5185: 5182: 5180: 5177: 5175: 5172: 5170: 5167: 5165: 5162: 5161: 5159: 5157: 5153: 5150: 5148: 5144: 5141: 5139: 5135: 5121: 5118: 5117: 5114: 5108: 5107:Sunbury Shale 5105: 5103: 5100: 5098: 5095: 5094: 5092: 5090: 5086: 5080: 5077: 5075: 5072: 5070: 5067: 5065: 5062: 5060: 5057: 5055: 5052: 5050: 5047: 5046: 5044: 5042: 5038: 5033: 5030: 5028: 5025: 5023: 5020: 5018: 5015: 5013: 5010: 5008: 5005: 5003: 5000: 4998: 4996: 4992: 4989: 4987: 4983: 4977: 4976:Lee Formation 4974: 4973: 4964: 4961: 4959: 4956: 4954: 4953:Hensley Shale 4951: 4949: 4946: 4945: 4943: 4941: 4937: 4931: 4928: 4926: 4923: 4921: 4918: 4916: 4913: 4911: 4908: 4907: 4905: 4903: 4899: 4896: 4894: 4890: 4887: 4885: 4881: 4878: 4876: 4870: 4867: 4865: 4859: 4855: 4851: 4844: 4839: 4837: 4832: 4830: 4825: 4824: 4821: 4810: 4807: 4805: 4803: 4799: 4785: 4782: 4780: 4777: 4775: 4772: 4770: 4767: 4765: 4762: 4761: 4748: 4745: 4744: 4742: 4740: 4736: 4733: 4731: 4727: 4721: 4718: 4716: 4713: 4712: 4707: 4704: 4703: 4702: 4701: 4699: 4697: 4693: 4690: 4688: 4684: 4672: 4669: 4667: 4664: 4662: 4659: 4658: 4657: 4656: 4653: 4651: 4648: 4647: 4642: 4641: 4640: 4638: 4635: 4634: 4632: 4630: 4626: 4618: 4615: 4614: 4613: 4612: 4606: 4603: 4601: 4598: 4597: 4596: 4595: 4592: 4589: 4588: 4586: 4584: 4580: 4576: 4575: 4567: 4564: 4562: 4559: 4557: 4554: 4553: 4552: 4551: 4548: 4546: 4543: 4542: 4537: 4534: 4532: 4529: 4527: 4524: 4523: 4522: 4521: 4518: 4516: 4515:Trenton Group 4513: 4512: 4509: 4506: 4504: 4501: 4499: 4496: 4495: 4493: 4491: 4487: 4484: 4482: 4478: 4466: 4463: 4462: 4461: 4460: 4457: 4455: 4452: 4451: 4446:"Red Clinton" 4445: 4442: 4440: 4437: 4436: 4435: 4434: 4431: 4429: 4428:Clinton Group 4426: 4425: 4423: 4421: 4417: 4404: 4402: 4399: 4397: 4394: 4391: 4390: 4389: 4388: 4385: 4382: 4381: 4376: 4373: 4372: 4371: 4370: 4367: 4365: 4362: 4361: 4359: 4357: 4353: 4350: 4348: 4344: 4332: 4329: 4328: 4327: 4326: 4323: 4321: 4318: 4317: 4315: 4313: 4309: 4301: 4298: 4297: 4296: 4295: 4292: 4290: 4287: 4286: 4284: 4282: 4278: 4275: 4273: 4269: 4261: 4258: 4257: 4256: 4255: 4252: 4250: 4247: 4246: 4242: 4239: 4237: 4234: 4233: 4231: 4229: 4225: 4222: 4220: 4216: 4200: 4197: 4195: 4192: 4191: 4190: 4189: 4186: 4183: 4182: 4180: 4178: 4174: 4168: 4165: 4164: 4162: 4160: 4156: 4150: 4147: 4145: 4142: 4140: 4136: 4132: 4129: 4128: 4126: 4124: 4120: 4117: 4115: 4111: 4101: 4098: 4093: 4092: 4091: 4090: 4085: 4082: 4081: 4080: 4079: 4073: 4070: 4067: 4064: 4063: 4062: 4061: 4058: 4055: 4054: 4049: 4046: 4045: 4044: 4043: 4040: 4038: 4035: 4034: 4032: 4030: 4026: 4020: 4017: 4013: 4010: 4008: 4005: 4003: 4000: 3998: 3995: 3994: 3993: 3992: 3989: 3987: 3984: 3983: 3982: 3978: 3976: 3972: 3969: 3967: 3963: 3957: 3954: 3952: 3949: 3948: 3937: 3936:Geneseo Shale 3933: 3930: 3928: 3925: 3923: 3920: 3919: 3918: 3917: 3912: 3911: 3910: 3908: 3907:Harrell Shale 3904: 3903:Genesee Group 3901: 3900: 3895: 3892: 3890: 3887: 3886: 3885: 3884: 3881: 3879: 3876: 3875: 3870: 3867: 3865: 3862: 3861: 3860: 3859: 3856: 3854: 3851: 3850: 3847: 3844: 3842: 3839: 3838: 3833: 3830: 3828: 3825: 3824: 3823: 3822: 3819: 3817: 3814: 3813: 3811: 3809: 3805: 3797: 3794: 3792: 3789: 3787: 3784: 3783: 3782: 3781: 3778: 3776: 3773: 3772: 3769: 3766: 3764: 3761: 3759: 3756: 3754: 3751: 3750: 3745: 3742: 3740: 3737: 3735: 3732: 3731: 3730: 3729: 3726: 3724: 3721: 3720: 3714: 3713: 3712: 3711: 3708: 3706: 3703: 3702: 3696: 3695: 3694: 3693: 3690: 3688: 3685: 3684: 3678: 3675: 3672: 3671: 3670: 3669: 3666: 3664: 3663:Venango Group 3661: 3660: 3657: 3654: 3652: 3651:Bedford Shale 3649: 3647: 3644: 3642: 3639: 3637: 3634: 3632: 3629: 3628: 3626: 3624: 3620: 3617: 3615: 3611: 3608: 3606: 3602: 3588: 3585: 3581: 3580:Bedford Shale 3578: 3576: 3573: 3571: 3570:Sunbury Shale 3568: 3565: 3562: 3561: 3560: 3559: 3556: 3554: 3551: 3550: 3547: 3544: 3543: 3541: 3539: 3535: 3529: 3525: 3522: 3521: 3519: 3517: 3513: 3505:"Little Lime" 3504: 3501: 3499: 3496: 3494: 3491: 3489: 3486: 3484: 3481: 3480: 3479: 3478: 3475: 3473: 3470: 3469: 3466: 3463: 3462: 3460: 3458: 3454: 3451: 3449: 3445: 3433: 3430: 3427: 3424: 3422: 3419: 3418: 3417: 3416: 3413: 3411: 3408: 3407: 3402: 3399: 3397: 3394: 3392: 3389: 3386: 3383: 3380: 3377: 3376: 3375: 3374: 3370: 3366: 3364: 3361: 3360: 3358: 3356: 3352: 3343: 3340: 3338: 3335: 3333: 3330: 3328: 3325: 3324: 3323: 3322: 3319: 3317: 3314: 3313: 3307: 3304: 3303: 3302: 3301: 3297: 3293: 3291: 3288: 3287: 3282: 3279: 3276: 3273: 3271: 3268: 3266:"No. 4a Coal" 3265: 3262: 3261: 3260: 3259: 3256: 3254: 3251: 3250: 3245: 3242: 3239: 3236: 3233: 3230: 3228: 3225: 3223: 3220: 3219: 3218: 3217: 3214: 3212: 3209: 3208: 3203: 3200: 3198: 3195: 3193:"No. 6a Coal" 3192: 3189: 3187: 3184: 3182: 3179: 3176: 3173: 3172: 3171: 3170: 3166: 3162: 3160: 3157: 3156: 3154: 3152: 3148: 3140: 3137: 3135:"No. 7a Coal" 3134: 3133:Mahoning Coal 3131: 3129: 3126: 3124: 3121: 3120: 3119: 3118: 3115: 3113: 3110: 3109: 3104: 3101: 3099: 3096: 3094: 3091: 3089: 3086: 3084: 3081: 3079: 3076: 3074: 3071: 3069: 3066: 3064: 3061: 3060: 3059: 3058: 3055: 3053: 3050: 3049: 3044: 3041: 3039: 3036: 3034: 3031: 3029: 3026: 3024: 3021: 3019: 3016: 3015: 3014: 3013: 3009: 3005: 3003: 3000: 2999: 2997: 2995: 2991: 2982: 2979: 2977: 2974: 2972:"No 8a. Coal" 2971: 2968: 2966: 2963: 2961: 2958: 2956: 2953: 2950: 2947: 2945: 2942: 2940: 2937: 2935: 2932: 2931: 2930: 2929: 2925: 2921: 2920: 2915: 2912: 2909: 2906: 2904:"No. 10 Coal" 2903: 2900: 2898: 2895: 2893: 2890: 2888: 2885: 2883: 2880: 2878: 2875: 2873:"No. 11 Coal" 2872: 2869: 2868: 2867: 2866: 2862: 2858: 2856: 2853: 2852: 2847: 2844: 2842: 2839: 2837: 2834: 2832: 2829: 2827: 2824: 2822: 2819: 2818: 2817: 2816: 2812: 2808: 2806: 2805:Dunkard Group 2803: 2802: 2800: 2798: 2794: 2791: 2789: 2785: 2782: 2780: 2776: 2764: 2761: 2759: 2756: 2754: 2751: 2749: 2746: 2744: 2741: 2739: 2736: 2735: 2734: 2733: 2729: 2725: 2724: 2719: 2716: 2713: 2711: 2708: 2706: 2703: 2701: 2698: 2696: 2693: 2691: 2688: 2686: 2683: 2681: 2678: 2676: 2673: 2671: 2668: 2666: 2663: 2661: 2658: 2656: 2653: 2652: 2651: 2650: 2646: 2642: 2640: 2639:Dunkard Group 2637: 2636: 2634: 2632: 2628: 2625: 2623: 2619: 2616: 2614: 2608: 2605: 2603: 2597: 2593: 2589: 2582: 2577: 2575: 2570: 2568: 2563: 2562: 2559: 2543: 2540: 2539: 2531: 2528: 2526: 2524: 2520: 2517: 2515: 2511: 2508: 2506: 2502: 2488: 2485: 2484: 2475: 2472: 2470: 2469:Knox Dolomite 2467: 2465: 2462: 2460: 2457: 2455: 2452: 2451: 2449: 2447: 2443: 2440: 2438: 2434: 2424: 2421: 2419: 2416: 2414: 2411: 2409: 2406: 2404: 2401: 2400: 2398: 2396: 2392: 2386: 2383: 2381: 2378: 2376: 2373: 2371: 2368: 2366: 2363: 2361: 2358: 2356: 2353: 2351: 2348: 2346: 2343: 2341: 2338: 2336: 2333: 2331: 2328: 2326: 2323: 2322: 2320: 2318: 2314: 2311: 2309: 2305: 2296: 2293: 2291: 2288: 2286: 2283: 2281: 2278: 2276: 2273: 2271: 2269: 2265: 2259: 2256: 2254: 2251: 2249: 2246: 2244: 2241: 2239: 2236: 2234: 2231: 2229: 2226: 2224: 2221: 2219: 2216: 2214: 2211: 2209: 2206: 2204: 2201: 2200: 2191: 2188: 2186: 2183: 2181: 2178: 2176: 2173: 2172: 2170: 2168: 2164: 2161: 2159: 2155: 2149: 2146: 2144: 2141: 2139: 2136: 2135: 2126: 2123: 2121: 2118: 2117: 2115: 2113: 2109: 2103: 2100: 2099: 2097: 2095: 2091: 2088: 2086: 2082: 2077: 2074: 2072: 2070: 2066: 2063: 2061: 2057: 2047: 2044: 2042: 2039: 2037: 2034: 2032: 2029: 2027: 2024: 2023: 2014: 2011: 2010: 2008: 2006: 2002: 1997: 1994: 1992: 1989: 1987: 1984: 1982: 1980: 1976: 1973: 1971: 1967: 1961: 1958: 1956: 1953: 1951: 1948: 1946: 1943: 1942: 1933: 1930: 1928: 1925: 1923: 1920: 1918: 1915: 1913: 1910: 1908: 1905: 1904: 1902: 1900: 1896: 1890: 1887: 1885: 1882: 1880: 1877: 1874: 1871: 1869: 1866: 1864: 1861: 1860: 1858: 1856: 1852: 1849: 1847: 1843: 1837: 1834: 1832: 1829: 1827: 1824: 1823: 1820: 1817: 1815: 1812: 1811: 1801: 1798: 1796: 1793: 1792: 1790: 1788: 1784: 1777: 1774: 1772: 1771:Chagrin Shale 1769: 1767: 1764: 1763: 1760: 1757: 1756: 1753: 1750: 1748: 1745: 1743: 1742:Bedford Shale 1740: 1739: 1737: 1735: 1731: 1728: 1726: 1722: 1719: 1717: 1713: 1699: 1696: 1694: 1691: 1690: 1687: 1681: 1680:Sunbury Shale 1678: 1676: 1673: 1671: 1668: 1667: 1665: 1663: 1659: 1653: 1650: 1649: 1647: 1645: 1641: 1638: 1636: 1632: 1622: 1619: 1617: 1614: 1613: 1611: 1609: 1605: 1599: 1596: 1594: 1591: 1589: 1586: 1585: 1583: 1581: 1577: 1571: 1568: 1566: 1563: 1561: 1558: 1557: 1554: 1551: 1549: 1548:Dunkard Group 1546: 1545: 1543: 1541: 1537: 1534: 1532: 1528: 1525: 1523: 1519: 1509: 1506: 1504: 1501: 1499: 1498:Dunkard Group 1496: 1495: 1493: 1491: 1487: 1484: 1482: 1478: 1475: 1473: 1467: 1464: 1462: 1456: 1452: 1448: 1441: 1436: 1434: 1429: 1427: 1422: 1421: 1418: 1390: 1387: 1385: 1382: 1381: 1379: 1377: 1373: 1367: 1364: 1362: 1359: 1358: 1356: 1354: 1350: 1344: 1343:Shriver Chert 1341: 1339: 1336: 1334: 1331: 1329: 1328:Mandata Shale 1326: 1324: 1321: 1320: 1318: 1316: 1312: 1309: 1307: 1303: 1293: 1290: 1288: 1285: 1284: 1282: 1280: 1276: 1270: 1267: 1266: 1264: 1262: 1258: 1255: 1253: 1249: 1239: 1236: 1234: 1231: 1229: 1226: 1224: 1221: 1219: 1216: 1215: 1213: 1211: 1207: 1201: 1198: 1196: 1193: 1192: 1190: 1188: 1184: 1181: 1179: 1175: 1172: 1170: 1166: 1152: 1149: 1147: 1144: 1143: 1141: 1139: 1135: 1129: 1126: 1124: 1121: 1120: 1118: 1116: 1112: 1106: 1103: 1101: 1098: 1097: 1095: 1093: 1089: 1086: 1084: 1080: 1077: 1075: 1071: 1068: 1066: 1060: 1057: 1055: 1049: 1045: 1041: 1034: 1029: 1027: 1022: 1020: 1015: 1014: 1011: 1005: 998: 981: 975: 970: 961: 947: 940: 934: 925: 911: 904: 897: 895: 893: 886: 879: 870: 862: 856: 848: 844: 840: 833: 815: 808: 802: 800: 793: 786: 780: 773: 767: 760: 756: 747: 744: 743: 737: 735: 731: 727: 717: 715: 711: 707: 694: 691: 689: 686: 684: 681: 679: 676: 674: 671: 669: 666: 664: 661: 660: 652: 649: 647: 644: 642: 639: 637: 636:Glyptotomaria 634: 631: 630:Dictyotomaria 628: 626: 625:Crenistriella 623: 621: 618: 617: 608: 607:Thamnoptychia 605: 603: 602:Pleurodictyum 600: 599: 593: 583: 580: 578: 575: 573: 570: 568: 565: 563: 560: 558: 557:Grammysioidea 555: 553: 550: 549: 541: 538: 535: 532: 530: 527: 525: 522: 521: 513: 510: 509: 501: 500:Tropidoleptus 498: 496: 493: 491: 490:Mucrospirifer 488: 486: 483: 481: 478: 477: 471: 469: 465: 461: 457: 453: 445: 441: 437: 433: 432: 426: 417: 414: 412: 411:ridge-formers 404: 400: 397: 394: 390: 387: 386: 385: 382: 380: 376: 368: 364: 360: 359:stratigraphic 355: 346: 344: 340: 330: 328: 324: 320: 316: 312: 308: 304: 300: 296: 295:West Virginia 292: 288: 285: 276: 273: 269: 264: 261: 260:West Virginia 257: 253: 249: 245: 242: 238: 235: 234:North America 229: 226: 222: 217: 214: 210: 207: 203: 200: 197: 193: 188: 185: 182: 178: 175: 171: 170:Harrell Shale 168: 164: 161: 158: 154: 151: 148: 144: 141: 138: 134: 129: 128:Fulton County 125: 119: 114: 101: 96: 91: 86: 81: 76: 71: 66: 61: 56: 51: 46: 40: 33: 29: 25: 20: 6801:Sheinwoodian 6776:Salina Group 6745:Salina Group 6722:Salina Group 6313:Serpukhovian 5549:Sheinwoodian 5252: 4995:Serpukhovian 4910:Betsie Shale 4572: 4454:Medina Group 4364:Salina Group 4320:Salina Group 4289:Salina Group 4249:Salina Group 4018: 3932:Burket Shale 3878:Sonyea Group 3553:Pocono Group 3457:Serpukhovian 3428:"No. 1 Coal" 3387:"No. 2 Coal" 3344:"No. 3 Coal" 3277:"No. 4 Coal" 3264:Clarian Coal 3240:"No. 5 Coal" 3234:"No. 6 Coal" 3177:"No. 7 Coal" 2983:"No. 8 Coal" 2910:"Great Lime" 2705:Tenmile Coal 2695:Dunkard Coal 2675:Nineveh Coal 2592:Pennsylvania 2243:Osgood Shale 2238:Massie Shale 2218:Estill Shale 2138:Salina Group 2120:Salina Group 2102:Salina Group 1867: 1831:Angola Shale 1814:Antrim Shale 1795:Burket Shale 1268: 1233:Harrel Shale 1092:Serpukhovian 980: 969: 960: 949:. Retrieved 933: 924: 913:. Retrieved 878: 869: 855: 838: 832: 821:. Retrieved 814:the original 785: 772: 759: 723: 703: 688:Striacoceras 609:(Trachypora) 591: 512:Ancyrocrinus 449: 440:Pennsylvania 431:Phacops rana 429: 415: 408: 383: 378: 372: 357:Generalized 336: 326: 291:Pennsylvania 286: 281: 266:Type section 252:Pennsylvania 7101:Tremadocian 7040:Darriwilian 6970:Utica Shale 6489:Rhinestreet 6364:Tournaisian 5089:Tournaisian 4508:Utica Shale 3744:Huron Shale 3538:Tournaisian 3526:"Big Lime" 3426:Sharon Coal 1776:Huron Shale 1662:Tournaisian 1138:Tournaisian 710:conformably 668:Agoniatites 657:Cephalopods 572:Modiomorpha 552:Actinodesma 534:Eldredgeops 474:Brachiopods 452:brachiopods 333:Description 7342:Categories 7234:Rome Group 7170:Knox Group 7114:Knox Group 6924:Hirnantian 6828:Llandovery 6714:Ludfordian 6642:Lochkovian 6451:Ohio Shale 6267:Bashkirian 6231:Kasimovian 6160:Cisuralian 5571:Llandovery 5457:Ludfordian 5365:Lochkovian 4940:Bashkirian 4420:Llandovery 4281:Ludfordian 4177:Lochkovian 4068:Moorehouse 3723:Ohio Shale 3355:Bashkirian 2994:Kasimovian 2631:Cisuralian 2268:Llandovery 2094:Ludfordian 2005:Lochkovian 1759:Ohio Shale 1580:Kasimovian 1490:Cisuralian 1376:Lochkovian 951:2008-05-26 915:2008-04-05 823:2008-01-26 752:References 734:Brachiopod 693:Koenenites 673:Spyroceras 663:Tornoceras 651:Platyceras 614:Gastropods 567:Leiopteria 518:Trilobites 460:trilobites 7289:Ediacaran 7153:Furongian 7061:Dapingian 6837:Telychian 6428:Famennian 6249:Moscovian 5580:Telychian 5156:Famennian 4902:Moscovian 4696:Furongian 4074:Edgecliff 3705:Elk Group 3623:Famennian 3151:Moscovian 2446:Furongian 1734:Famennian 1608:Moscovian 1187:Famennian 712:atop the 683:Bactrites 582:Orthonota 577:Nuculites 562:Grammysia 468:bryozoans 436:Milesburg 428:Enrolled 403:claystone 393:sandstone 339:siltstone 271:Named for 213:Siltstone 209:Limestone 190:Lithology 166:Underlies 156:Sub-units 37:387  7162:Stage 10 6980:Sandbian 6875:Aeronian 6768:Homerian 6737:Gorstian 6550:Eifelian 6527:Givetian 6466:Frasnian 6213:Gzhelian 6169:Asselian 5608:Aeronian 5526:Homerian 5485:Gorstian 5268:Eifelian 5245:Givetian 5199:Frasnian 4854:Virginia 4730:Series 2 4356:Homerian 4312:Gorstian 4029:Eifelian 3975:Givetian 3808:Frasnian 2797:Gzhelian 2167:Homerian 2112:Gorstian 1899:Eifelian 1855:Givetian 1787:Frasnian 1540:Gzhelian 1279:Eifelian 1261:Givetian 1210:Frasnian 1044:Maryland 985:611-629. 740:See also 706:Devonian 641:Loxonema 620:Bembexia 546:Bivalves 540:Greenops 529:Dipleura 506:Crinoids 485:Chonetes 464:bivalves 456:crinoids 299:Maryland 284:Devonian 256:Virginia 244:Maryland 232:eastern 219:Location 180:Overlies 32:Givetian 6759:Wenlock 6677:Pridoli 6624:Pragian 5517:Wenlock 5420:Pridoli 5337:Pragian 4739:Stage 4 4347:Wenlock 4228:Pridoli 4159:Pragian 2158:Wenlock 2069:Pridoli 1875:(lower) 1802:(upper) 1353:Pragian 588:Bryozoa 480:Athyris 446:visible 442:, with 420:Fossils 311:Juniata 195:Primary 146:Unit of 124:Rt. 522 106:↓ 7031:Middle 6947:Katian 6705:Ludlow 6601:Emsian 6518:Middle 6346:Viséan 6093:Eocene 5816:Middle 5448:Ludlow 5314:Emsian 5236:Middle 5041:Viséan 4583:Middle 4272:Ludlow 4123:Emsian 4071:Nedrow 4065:Seneca 3966:Middle 3516:Viséan 2395:Middle 2085:Ludlow 1979:Emsian 1846:Middle 1644:Viséan 1315:Emsian 1252:Middle 1115:Viséan 466:, and 297:, and 258:, and 240:Extent 224:Region 7092:Lower 6915:Upper 6592:Lower 6419:Upper 5834:Lower 5648:Upper 5305:Lower 5147:Upper 4629:Lower 4490:Upper 4114:Lower 3614:Upper 2317:Upper 1970:Lower 1725:Upper 1306:Lower 1178:Upper 942:(PDF) 906:(PDF) 817:(PDF) 810:(PDF) 730:delta 596:Coral 343:shale 307:Perry 205:Other 199:Shale 1451:Ohio 341:and 309:and 282:The 248:Ohio 172:and 136:Type 45:PreꞒ 6050:of 4852:of 2590:of 1449:of 1042:of 700:Age 305:in 34:, ~ 7344:: 7262:pЄ 6141:Pz 6114:Mz 6083:Pe 6072:Cz 6061:Ph 5972:pЄ 4874:Pz 4863:Ph 4802:pЄ 4137:, 4133:, 3934:/ 3905:/ 2612:Pz 2601:Ph 2505:pЄ 1471:Pz 1460:Ph 1064:Pz 1053:Ph 944:. 908:. 891:^ 845:. 798:^ 470:. 462:, 458:, 454:, 438:, 413:. 293:, 254:, 250:, 246:, 230:of 211:, 126:, 95:Pg 39:Ma 30:: 7280:Z 7271:♇ 7144:Є 6906:O 6668:S 6410:D 6304:M 6204:⁋ 6195:C 6151:P 6124:J 6040:e 6033:t 6026:v 5990:Z 5981:♇ 5881:Є 5639:O 5411:S 5138:D 4986:M 4893:⁋ 4884:C 4842:e 4835:t 4828:v 4687:Є 4607:: 4481:O 4219:S 3605:D 3448:M 3371:: 3298:: 3167:: 3010:: 2926:: 2863:: 2813:: 2788:⁋ 2779:C 2730:: 2647:: 2622:P 2580:e 2573:t 2566:v 2523:Z 2514:♇ 2437:Є 2308:O 2060:S 1778:) 1716:D 1635:M 1531:⁋ 1522:C 1481:P 1439:e 1432:t 1425:v 1169:D 1083:M 1074:C 1032:e 1025:t 1018:v 954:. 918:. 863:. 826:. 695:? 632:? 369:. 100:N 90:K 85:J 80:T 75:P 70:C 65:D 60:S 55:O 50:Ꞓ

Index

Stratigraphic range
Givetian
Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Rt. 522
Fulton County
Geological formation
Hamilton Group
See: Description
Harrell Shale
West Falls Formation
Marcellus Formation
Shale
Limestone
Siltstone
Appalachian Basin
North America
Maryland

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