241:
2173:
355:
de Witt, Wallace, Jr., 1974, Geologic map of the Beans Cove and
Hyndman quadrangles and part of the Fairhope quadrangle, Bedford County, Pennsylvania: U.S. Geological Survey Miscellaneous Investigations Series Map, I-801, 6 p., 1 sheet, scale
345:
Dennison, J.M., 1970, Stratigraphic divisions of Upper
Devonian Greenland Gap Group ("Chemung Formation") along Allegheny Front in West Virginia, Maryland, and Highland County, Virginia: Southeastern Geology, v. 12, no. 1, p.
384:
Warne, A.G., and McGhee, G.R., Jr., 1991, Stratigraphic subdivisions of the Upper
Devonian Scherr, Foreknobs, and Lock Haven Formations near the Allegheny Front of central Pennsylvania: Northeastern Geology, v. 13, no. 2, p.
860:
374:
Lyke, W.L., 1986, The stratigraphy, paleogeography, depositional environment, faunal communities, and general petrology of the
Minnehaha Springs Member of the Scherr Formation: Southeastern Geology, v. 26, no. 3, p.
221:
Boswell et al. (1987), does not recognize the Scherr and
Foreknobs Formations in the subsurface of West Virginia, and thus, these formations are reduced from "group" to "formation" as the Greenland Gap Formation.
365:
Boswell, R.M., Donaldson, A.C., and Lewis, J.S., 1987, Subsurface stratigraphy of the Upper
Devonian and Lower Mississippian of northern West Virginia: Southeastern Geology, v. 28, no. 2, p. 105-131.
867:
2217:
790:
2291:
460:
1834:
229:
bundle" consisting of interbedded medium gray siltstone and olive-gray shale with some grayish-red siltstone and shale and some sandstone. It is interpreted as
795:
752:
818:
575:
557:
1954:
1844:
2141:
1716:
772:
757:
2256:
2210:
662:
2251:
1317:
2241:
853:
453:
214:
Dennison (1970) renamed the old
Chemung Formation the Greenland Gap Group and divided it into the lower Scherr Formation and the upper
2276:
2266:
2203:
2246:
2236:
446:
2281:
264:
2296:
218:. De Witt (1974) extended the Scherr and Foreknobs into Pennsylvania but did not use the term Greenland Gap Group.
2286:
2261:
259:
2271:
1077:
325:
as the earliest known tetrapod (land vertebrate). Later research, however, identified this fossil as
2183:
2052:
1032:
1614:
1518:
255:
2005:
1936:
1839:
1609:
1049:
534:
322:
233:. This same member is proposed to exist at the base of the Scherr's lateral equivalent, the
143:
120:
2072:
1949:
1793:
1312:
1118:
698:
552:
529:
408:
234:
2191:
8:
2136:
1910:
1816:
1711:
1688:
1555:
1164:
1154:
1149:
1132:
1113:
1085:
657:
652:
624:
512:
215:
62:
412:
2124:
2037:
2027:
1678:
1642:
1619:
1587:
1460:
1442:
1406:
1396:
1302:
1284:
1210:
1205:
876:
767:
647:
629:
580:
469:
424:
72:
845:
2067:
2057:
2032:
1990:
1880:
1875:
1859:
1821:
1788:
1765:
1673:
1637:
1332:
1108:
428:
206:, while upper two thirds contains almost no sandstone. It weathers light olive gray.
1920:
1849:
1783:
1760:
1743:
1683:
1656:
1523:
1513:
1478:
1322:
1182:
1159:
1103:
813:
416:
420:
2047:
2022:
1693:
1391:
1363:
1346:
1269:
1264:
1220:
1200:
1067:
716:
681:
438:
2187:
2108:
1897:
1437:
1420:
1401:
1386:
1368:
1307:
1247:
762:
735:
721:
607:
2230:
1505:
1327:
1274:
1215:
1023:
1005:
880:
503:
279:
266:
183:
24:
2180:
1629:
1604:
1573:
1550:
1533:
1141:
521:
313:
171:
2099:
2090:
1929:
1868:
1798:
1192:
888:
567:
481:
2062:
1998:
1942:
1752:
1734:
1542:
1470:
1279:
1095:
1059:
988:
805:
244:
Scherr
Formation within a geological cross section of the United States
240:
2117:
1981:
1889:
1665:
1256:
968:
910:
616:
492:
326:
230:
203:
195:
105:
1174:
544:
1972:
1808:
1703:
1596:
1565:
1496:
1378:
1355:
1294:
1238:
1041:
997:
952:
941:
899:
708:
690:
639:
598:
473:
317:
301:
179:
175:
160:
28:
1452:
979:
782:
226:
167:
1775:
1429:
921:
744:
2172:
199:
95:
399:
and a critical review of
Devonian tetrapod footprints".
202:. Lower part of unit includes considerable fine-grained
875:
468:
300:Relative age dating places the Scherr in the late
312:The Scherr Formation is the likely origin of the
2228:
2292:Southern United States geologic formation stubs
194:The Scherr Formation consists predominantly of
130:Pennsylvania, Maryland, Virginia, West Virginia
2211:
861:
454:
2218:
2204:
868:
854:
461:
447:
82:1,004 ft (306 m) at type section
388:
239:
2229:
2257:Shale formations of the United States
849:
442:
394:
2252:Geologic formations of West Virginia
2167:
2242:Geologic formations of Pennsylvania
248:
225:The Minnehaha Springs Member is a "
13:
14:
2308:
321:, which was described in 1896 by
2277:Devonian geology of Pennsylvania
2267:Devonian System of North America
2171:
2247:Geologic formations of Virginia
2237:Geologic formations of Maryland
307:
209:
2179:This article about a specific
378:
368:
359:
349:
339:
329:(fossilized feces) of fishes.
189:
1:
421:10.1080/10420940.2015.1063491
332:
2282:Devonian geology of Virginia
2190:. You can help Knowledge by
7:
395:Lucas, Spencer G. (2015). "
10:
2313:
2166:
2116:
2107:
2098:
2089:
1989:
1980:
1971:
1928:
1919:
1888:
1867:
1858:
1807:
1774:
1751:
1742:
1733:
1702:
1664:
1655:
1628:
1595:
1586:
1564:
1541:
1532:
1504:
1495:
1469:
1451:
1428:
1419:
1377:
1354:
1345:
1293:
1255:
1246:
1237:
1191:
1173:
1140:
1131:
1094:
1076:
1058:
1040:
1031:
1022:
996:
987:
978:
967:
951:
940:
920:
909:
898:
887:
804:
781:
743:
734:
707:
689:
680:
638:
615:
606:
597:
566:
543:
520:
511:
502:
491:
480:
149:
139:
134:
126:
116:
111:
101:
91:
86:
78:
68:
58:
50:
42:
34:
23:
18:
2297:Maryland geography stubs
54:Minnehaha Springs Member
2053:Conococheague Formation
791:Corriganville Limestone
2287:Devonian West Virginia
1615:Williamsport Formation
1519:Bass Islands Formation
295:
256:West Virginia Route 42
245:
2006:Copper Ridge Dolomite
1937:Wells Creek Formation
1840:Martinsburg Formation
1835:Dolly Ridge Formation
1610:Wills Creek Formation
1050:Monongahela Formation
535:Mauch Chunk Formation
323:Othniel Charles Marsh
280:39.19583°N 79.18000°W
243:
144:Scherr, West Virginia
121:Appalachian Mountains
2262:Siltstone formations
2073:Waynesboro Formation
1950:Beekmantown Dolomite
1794:Reedsville Formation
1313:West Falls Formation
1119:Pocahontas Formation
796:Helderberg Formation
753:Helderberg Formation
699:Mahantango Formation
553:Greenbrier Formation
530:Greenbrier Formation
254:Type section: along
235:Lock Haven Formation
153:J. M. Dennison, 1970
2137:Swift Run Formation
1911:St. Peter Sandstone
1817:Lexington Limestone
1712:Tuscarora Sandstone
1689:Rose Hill Formation
1556:Tonoloway Formation
1165:Bluefield Formation
1155:Princeton Sandstone
1150:Bluestone Formation
1114:New River Formation
1086:Allegheny Formation
819:New Creek Limestone
658:Greenland Gap Group
653:Foreknobs Formation
625:Hampshire Formation
576:Purseland Sandstone
558:Purseland Sandstone
413:2015Ichno..22..136L
285:39.19583; -79.18000
276: /
216:Foreknobs Formation
63:Foreknobs Formation
46:Greenland Gap Group
25:Stratigraphic range
2125:Catoctin Formation
2038:Weverton Formation
2028:Antietam Formation
1955:Rose Run Sandstone
1845:Nealmont Limestone
1679:McKenzie Formation
1643:McKenzie Formation
1620:McKenzie Formation
1461:Oriskany Sandstone
1443:Huntersville Chert
1407:Huntersville Chert
1397:Onondaga Limestone
1303:Brallier Formation
1285:Brallier Formation
1211:Maccrady Formation
1206:Cuyahoga Formation
958:Igneous intrusives
927:Igneous intrusives
877:Chronostratigraphy
768:Oriskany Sandstone
648:Brallier Formation
630:Rockwell Formation
581:Rockwell Formation
470:Chronostratigraphy
246:
73:Brallier Formation
2272:Devonian Maryland
2199:
2198:
2186:in Maryland is a
2158:
2157:
2154:
2153:
2150:
2149:
2142:Grenville Complex
2132:
2131:
2085:
2084:
2081:
2080:
2068:Tomstown Dolomite
2058:Elbrook Formation
2042:Loudoun Formation
2033:Harpers Formation
2018:
2017:
2014:
2013:
1967:
1966:
1963:
1962:
1906:
1905:
1881:Black River Group
1876:Trenton Limestone
1830:
1829:
1822:Trenton Limestone
1789:Juniata Formation
1766:Juniata Formation
1729:
1728:
1725:
1724:
1717:Clinton Sandstone
1674:Lockport Dolomite
1651:
1650:
1638:Lockport Dolomite
1582:
1581:
1491:
1490:
1487:
1486:
1415:
1414:
1341:
1340:
1333:Genesee Formation
1233:
1232:
1229:
1228:
1127:
1126:
1109:Kanawha Formation
1018:
1017:
1014:
1013:
963:
962:
936:
935:
932:
931:
843:
842:
839:
838:
835:
834:
831:
830:
827:
826:
730:
729:
676:
675:
593:
592:
589:
588:
157:
156:
2304:
2220:
2213:
2206:
2175:
2168:
2114:
2113:
2105:
2104:
2096:
2095:
1987:
1986:
1978:
1977:
1926:
1925:
1865:
1864:
1850:Oswego Formation
1784:Cincinnati Group
1761:Cincinnati Group
1749:
1748:
1740:
1739:
1684:Keefer Formation
1662:
1661:
1593:
1592:
1539:
1538:
1524:Keyser Formation
1514:Bertie Formation
1502:
1501:
1479:Helderberg Group
1426:
1425:
1352:
1351:
1323:Sonyea Formation
1253:
1252:
1244:
1243:
1183:Greenbrier Group
1160:Hinton Formation
1138:
1137:
1104:Pottsville Group
1038:
1037:
1029:
1028:
994:
993:
985:
984:
976:
975:
971:
949:
948:
944:
918:
917:
913:
907:
906:
902:
896:
895:
891:
870:
863:
856:
847:
846:
814:Keyser Limestone
741:
740:
687:
686:
668:Scherr Formation
613:
612:
604:
603:
518:
517:
509:
508:
500:
499:
495:
489:
488:
484:
463:
456:
449:
440:
439:
433:
432:
407:(3–4): 136–154.
392:
386:
382:
376:
372:
366:
363:
357:
353:
347:
343:
291:
290:
288:
287:
286:
281:
277:
274:
273:
272:
269:
249:Notable outcrops
164:Scherr Formation
19:Scherr Formation
16:
15:
2312:
2311:
2307:
2306:
2305:
2303:
2302:
2301:
2227:
2226:
2225:
2224:
2164:
2161:
2159:
2146:
2128:
2077:
2048:Conasauga Group
2023:Chilhowee Group
2010:
1959:
1915:
1902:
1884:
1854:
1826:
1803:
1770:
1721:
1698:
1694:Rochester Shale
1647:
1624:
1578:
1560:
1528:
1483:
1465:
1447:
1411:
1392:Marcellus Shale
1373:
1364:Tully Limestone
1337:
1289:
1270:Berea Sandstone
1265:Price Formation
1225:
1221:Berea Sandstone
1201:Price Formation
1187:
1169:
1123:
1090:
1072:
1068:Conemaugh Group
1054:
1010:
969:
959:
942:
928:
911:
900:
889:
883:
874:
844:
823:
800:
777:
726:
717:Marcellus Shale
703:
672:
634:
585:
562:
539:
493:
482:
476:
467:
437:
436:
393:
389:
383:
379:
373:
369:
364:
360:
354:
350:
344:
340:
335:
310:
298:
284:
282:
278:
275:
270:
267:
265:
263:
262:
251:
212:
192:
12:
11:
5:
2310:
2300:
2299:
2294:
2289:
2284:
2279:
2274:
2269:
2264:
2259:
2254:
2249:
2244:
2239:
2223:
2222:
2215:
2208:
2200:
2197:
2196:
2176:
2156:
2155:
2152:
2151:
2148:
2147:
2145:
2144:
2139:
2133:
2130:
2129:
2127:
2122:
2120:
2111:
2102:
2093:
2087:
2086:
2083:
2082:
2079:
2078:
2076:
2075:
2070:
2065:
2060:
2055:
2050:
2044:
2043:
2040:
2035:
2030:
2025:
2019:
2016:
2015:
2012:
2011:
2009:
2008:
2002:
2001:
1995:
1993:
1984:
1975:
1969:
1968:
1965:
1964:
1961:
1960:
1958:
1957:
1952:
1946:
1945:
1939:
1934:
1932:
1923:
1917:
1916:
1914:
1913:
1907:
1904:
1903:
1901:
1900:
1898:St. Paul Group
1894:
1892:
1886:
1885:
1883:
1878:
1873:
1871:
1862:
1856:
1855:
1853:
1852:
1847:
1842:
1837:
1831:
1828:
1827:
1825:
1824:
1819:
1813:
1811:
1805:
1804:
1802:
1801:
1796:
1791:
1786:
1780:
1778:
1772:
1771:
1769:
1768:
1763:
1757:
1755:
1746:
1737:
1731:
1730:
1727:
1726:
1723:
1722:
1720:
1719:
1714:
1708:
1706:
1700:
1699:
1697:
1696:
1691:
1686:
1681:
1676:
1670:
1668:
1659:
1653:
1652:
1649:
1648:
1646:
1645:
1640:
1634:
1632:
1626:
1625:
1623:
1622:
1617:
1612:
1607:
1601:
1599:
1590:
1584:
1583:
1580:
1579:
1577:
1576:
1570:
1568:
1562:
1561:
1559:
1558:
1553:
1547:
1545:
1536:
1530:
1529:
1527:
1526:
1521:
1516:
1510:
1508:
1499:
1493:
1492:
1489:
1488:
1485:
1484:
1482:
1481:
1475:
1473:
1467:
1466:
1464:
1463:
1457:
1455:
1449:
1448:
1446:
1445:
1440:
1438:Needmore Shale
1434:
1432:
1423:
1417:
1416:
1413:
1412:
1410:
1409:
1404:
1402:Needmore Shale
1399:
1394:
1389:
1387:Hamilton Group
1383:
1381:
1375:
1374:
1372:
1371:
1369:Hamilton Group
1366:
1360:
1358:
1349:
1343:
1342:
1339:
1338:
1336:
1335:
1330:
1325:
1320:
1315:
1310:
1308:Java Formation
1305:
1299:
1297:
1291:
1290:
1288:
1287:
1282:
1277:
1272:
1267:
1261:
1259:
1250:
1241:
1235:
1234:
1231:
1230:
1227:
1226:
1224:
1223:
1218:
1213:
1208:
1203:
1197:
1195:
1189:
1188:
1186:
1185:
1179:
1177:
1171:
1170:
1168:
1167:
1162:
1157:
1152:
1146:
1144:
1135:
1129:
1128:
1125:
1124:
1122:
1121:
1116:
1111:
1106:
1100:
1098:
1092:
1091:
1089:
1088:
1082:
1080:
1074:
1073:
1071:
1070:
1064:
1062:
1056:
1055:
1053:
1052:
1046:
1044:
1035:
1026:
1020:
1019:
1016:
1015:
1012:
1011:
1009:
1008:
1002:
1000:
991:
982:
973:
965:
964:
961:
960:
957:
955:
946:
938:
937:
934:
933:
930:
929:
926:
924:
915:
904:
893:
885:
884:
873:
872:
865:
858:
850:
841:
840:
837:
836:
833:
832:
829:
828:
825:
824:
822:
821:
816:
810:
808:
802:
801:
799:
798:
793:
787:
785:
779:
778:
776:
775:
770:
765:
763:Needmore Shale
760:
755:
749:
747:
738:
732:
731:
728:
727:
725:
724:
722:Needmore Shale
719:
713:
711:
705:
704:
702:
701:
695:
693:
684:
678:
677:
674:
673:
671:
670:
665:
660:
655:
650:
644:
642:
636:
635:
633:
632:
627:
621:
619:
610:
601:
595:
594:
591:
590:
587:
586:
584:
583:
578:
572:
570:
564:
563:
561:
560:
555:
549:
547:
541:
540:
538:
537:
532:
526:
524:
515:
506:
497:
486:
478:
477:
466:
465:
458:
451:
443:
435:
434:
387:
377:
367:
358:
348:
337:
336:
334:
331:
309:
306:
297:
294:
293:
292:
250:
247:
211:
208:
191:
188:
155:
154:
151:
147:
146:
141:
137:
136:
132:
131:
128:
124:
123:
118:
114:
113:
109:
108:
103:
99:
98:
93:
89:
88:
84:
83:
80:
76:
75:
70:
66:
65:
60:
56:
55:
52:
48:
47:
44:
40:
39:
36:
32:
31:
21:
20:
9:
6:
4:
3:
2:
2309:
2298:
2295:
2293:
2290:
2288:
2285:
2283:
2280:
2278:
2275:
2273:
2270:
2268:
2265:
2263:
2260:
2258:
2255:
2253:
2250:
2248:
2245:
2243:
2240:
2238:
2235:
2234:
2232:
2221:
2216:
2214:
2209:
2207:
2202:
2201:
2195:
2193:
2189:
2185:
2182:
2181:stratigraphic
2177:
2174:
2170:
2169:
2165:
2162:
2143:
2140:
2138:
2135:
2134:
2126:
2123:
2121:
2119:
2115:
2112:
2110:
2106:
2103:
2101:
2097:
2094:
2092:
2088:
2074:
2071:
2069:
2066:
2064:
2061:
2059:
2056:
2054:
2051:
2049:
2046:
2045:
2041:
2039:
2036:
2034:
2031:
2029:
2026:
2024:
2021:
2020:
2007:
2004:
2003:
2000:
1997:
1996:
1994:
1992:
1988:
1985:
1983:
1979:
1976:
1974:
1970:
1956:
1953:
1951:
1948:
1947:
1944:
1941:
1940:
1938:
1935:
1933:
1931:
1927:
1924:
1922:
1918:
1912:
1909:
1908:
1899:
1896:
1895:
1893:
1891:
1887:
1882:
1879:
1877:
1874:
1872:
1870:
1866:
1863:
1861:
1857:
1851:
1848:
1846:
1843:
1841:
1838:
1836:
1833:
1832:
1823:
1820:
1818:
1815:
1814:
1812:
1810:
1806:
1800:
1797:
1795:
1792:
1790:
1787:
1785:
1782:
1781:
1779:
1777:
1773:
1767:
1764:
1762:
1759:
1758:
1756:
1754:
1750:
1747:
1745:
1741:
1738:
1736:
1732:
1718:
1715:
1713:
1710:
1709:
1707:
1705:
1701:
1695:
1692:
1690:
1687:
1685:
1682:
1680:
1677:
1675:
1672:
1671:
1669:
1667:
1663:
1660:
1658:
1654:
1644:
1641:
1639:
1636:
1635:
1633:
1631:
1627:
1621:
1618:
1616:
1613:
1611:
1608:
1606:
1603:
1602:
1600:
1598:
1594:
1591:
1589:
1585:
1575:
1572:
1571:
1569:
1567:
1563:
1557:
1554:
1552:
1549:
1548:
1546:
1544:
1540:
1537:
1535:
1531:
1525:
1522:
1520:
1517:
1515:
1512:
1511:
1509:
1507:
1503:
1500:
1498:
1494:
1480:
1477:
1476:
1474:
1472:
1468:
1462:
1459:
1458:
1456:
1454:
1450:
1444:
1441:
1439:
1436:
1435:
1433:
1431:
1427:
1424:
1422:
1418:
1408:
1405:
1403:
1400:
1398:
1395:
1393:
1390:
1388:
1385:
1384:
1382:
1380:
1376:
1370:
1367:
1365:
1362:
1361:
1359:
1357:
1353:
1350:
1348:
1344:
1334:
1331:
1329:
1328:Harrell Shale
1326:
1324:
1321:
1319:
1316:
1314:
1311:
1309:
1306:
1304:
1301:
1300:
1298:
1296:
1292:
1286:
1283:
1281:
1278:
1276:
1275:Bedford Shale
1273:
1271:
1268:
1266:
1263:
1262:
1260:
1258:
1254:
1251:
1249:
1245:
1242:
1240:
1236:
1222:
1219:
1217:
1216:Sunbury Shale
1214:
1212:
1209:
1207:
1204:
1202:
1199:
1198:
1196:
1194:
1190:
1184:
1181:
1180:
1178:
1176:
1172:
1166:
1163:
1161:
1158:
1156:
1153:
1151:
1148:
1147:
1145:
1143:
1139:
1136:
1134:
1130:
1120:
1117:
1115:
1112:
1110:
1107:
1105:
1102:
1101:
1099:
1097:
1093:
1087:
1084:
1083:
1081:
1079:
1075:
1069:
1066:
1065:
1063:
1061:
1057:
1051:
1048:
1047:
1045:
1043:
1039:
1036:
1034:
1030:
1027:
1025:
1021:
1007:
1006:Dunkard Group
1004:
1003:
1001:
999:
995:
992:
990:
986:
983:
981:
977:
974:
972:
966:
956:
954:
950:
947:
945:
939:
925:
923:
919:
916:
914:
908:
905:
903:
897:
894:
892:
886:
882:
881:West Virginia
878:
871:
866:
864:
859:
857:
852:
851:
848:
820:
817:
815:
812:
811:
809:
807:
803:
797:
794:
792:
789:
788:
786:
784:
780:
774:
773:Shriver Chert
771:
769:
766:
764:
761:
759:
758:Mandata Shale
756:
754:
751:
750:
748:
746:
742:
739:
737:
733:
723:
720:
718:
715:
714:
712:
710:
706:
700:
697:
696:
694:
692:
688:
685:
683:
679:
669:
666:
664:
661:
659:
656:
654:
651:
649:
646:
645:
643:
641:
637:
631:
628:
626:
623:
622:
620:
618:
614:
611:
609:
605:
602:
600:
596:
582:
579:
577:
574:
573:
571:
569:
565:
559:
556:
554:
551:
550:
548:
546:
542:
536:
533:
531:
528:
527:
525:
523:
519:
516:
514:
510:
507:
505:
501:
498:
496:
490:
487:
485:
479:
475:
471:
464:
459:
457:
452:
450:
445:
444:
441:
430:
426:
422:
418:
414:
410:
406:
402:
398:
391:
381:
371:
362:
352:
342:
338:
330:
328:
324:
320:
319:
315:
305:
303:
289:
261:
257:
253:
252:
242:
238:
236:
232:
228:
223:
219:
217:
207:
205:
201:
197:
187:
185:
184:West Virginia
181:
177:
173:
169:
165:
162:
152:
148:
145:
142:
138:
133:
129:
125:
122:
119:
115:
110:
107:
104:
100:
97:
94:
90:
85:
81:
77:
74:
71:
67:
64:
61:
57:
53:
49:
45:
41:
37:
33:
30:
26:
22:
17:
2192:expanding it
2178:
2163:
2160:
1630:Sheinwoodian
1605:Salina Group
1574:Salina Group
1551:Salina Group
1142:Serpukhovian
667:
663:Harrel Shale
522:Serpukhovian
404:
400:
396:
390:
380:
370:
361:
351:
341:
316:
314:trace fossil
311:
308:Paleontology
299:
260:Grant County
224:
220:
213:
210:Stratigraphy
193:
172:Pennsylvania
166:is a mapped
163:
158:
135:Type section
1930:Tremadocian
1869:Darriwilian
1799:Utica Shale
1318:Rhinestreet
1193:Tournaisian
568:Tournaisian
283: /
190:Description
38:sedimentary
2231:Categories
2063:Rome Group
1999:Knox Group
1943:Knox Group
1753:Hirnantian
1657:Llandovery
1543:Ludfordian
1471:Lochkovian
1280:Ohio Shale
1096:Bashkirian
1060:Kasimovian
989:Cisuralian
806:Lochkovian
333:References
327:coprolites
271:79°10′48″W
268:39°11′45″N
231:turbidites
2184:formation
2118:Ediacaran
1982:Furongian
1890:Dapingian
1666:Telychian
1257:Famennian
1078:Moscovian
617:Famennian
429:130053031
204:sandstone
196:siltstone
140:Named for
106:Siltstone
87:Lithology
79:Thickness
59:Underlies
51:Sub-units
1991:Stage 10
1809:Sandbian
1704:Aeronian
1597:Homerian
1566:Gorstian
1379:Eifelian
1356:Givetian
1295:Frasnian
1042:Gzhelian
998:Asselian
709:Eifelian
691:Givetian
640:Frasnian
474:Maryland
397:Thinopus
375:173-192.
356:1:24,000
318:Thinopus
302:Devonian
180:Virginia
176:Maryland
170:unit in
161:Devonian
150:Named by
112:Location
69:Overlies
29:Devonian
1588:Wenlock
1506:Pridoli
1453:Pragian
783:Pragian
409:Bibcode
385:96-109.
227:clastic
168:bedrock
92:Primary
43:Unit of
27:: Late
1860:Middle
1776:Katian
1534:Ludlow
1430:Emsian
1347:Middle
1175:Viséan
922:Eocene
745:Emsian
682:Middle
545:Viséan
427:
401:Ichnos
346:53-82.
127:Extent
117:Region
1921:Lower
1744:Upper
1421:Lower
1248:Upper
736:Lower
608:Upper
425:S2CID
200:shale
102:Other
96:Shale
2188:stub
198:and
182:and
159:The
35:Type
879:of
472:of
417:doi
296:Age
2233::
2091:pЄ
970:Pz
943:Mz
912:Pe
901:Cz
890:Ph
494:Pz
483:Ph
423:.
415:.
405:22
403:.
304:.
258:,
237:.
186:.
178:,
174:,
2219:e
2212:t
2205:v
2194:.
2109:Z
2100:♇
1973:Є
1735:O
1497:S
1239:D
1133:M
1033:⁋
1024:C
980:P
953:J
869:e
862:t
855:v
599:D
513:M
504:C
462:e
455:t
448:v
431:.
419::
411::
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