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Carboniferous Limestone

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dissolved and removed in solution. Caverns are often found below the surface in the limestone and as the lime-rich water finds its way underground it begins to drip from the roof of the cavern. It is cold underground so there is little evaporation but some does take place leaving a trace of limestone on the roof. Over thousands of years a stalactite forms from the ceiling as the water continues to drip. When the water drips on to the floor of the cavern some evaporation occurs here also leaving a trace of limestone. Again over thousands of years a stalagmite is formed. A stone pillar is formed when a stalagmite and stalactite meet.
840: 135: 188: 851: 38: 903:. After the ice retreated, the valley was further developed by a meltwater stream flowing across the limestone while it was frozen solid. Watlowes Valley is a particularly good example of a dry valley because it has a textbook profile - the south-facing side is less steep than the north-facing side. This results from the weathering and mass movement processes that have operated in the post-glacial period. 344: 942:- the most spectacular feature in the Yorkshire Dales. At the end of the Ice Age the limestone, which had been frozen solid, once again became permeable, allowing the water to disappear through its joints. Now Malham Cove is a high cliff (83 m high) – it is completely dry, and a great attraction to rock climbers. 798:
Carboniferous Limestone is a hard sedimentary rock made largely of calcium carbonate. It is generally light-grey in colour. It was formed in warm, shallow tropical seas teeming with life. The rock is made up of the shells and hard parts of millions of sea creatures, some up to 30 cm in length,
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are the two main subsurface features in a Carboniferous Limestone area. These are formed when rainwater - a weak carbonic acid capable of dissolving limestone - percolates through it via the grykes and joints underground. This means the limestone is pervious. As this happens the limestone is
881:, solution hollows and dolines are very common in the Yorkshire Dales and Brecon Beacons. Typically from 1–20 m deep and 1–60 m across, they form as a result of the subsurface collapse of limestone or through the more gradual dropping of surface material into caves. 830:
but which has all manner of characteristic surface and subsurface features. The Carboniferous Limestone has been folded and faulted by massive Earth movements which can be seen by the fact that the rocks are now above sea-level and no longer horizontal.
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Because it is brittle, the use of Carboniferous Limestone for building stone tends to be limited to those areas where it is the most abundantly available rock. However it is extensively quarried for other purposes:
175:. These rocks formed between 363 and 325 million years ago. Within England and Wales, the entire limestone succession, which includes subordinate mudstones and some thin sandstones, is known as the 910:
is an area of almost bare, flat rock and is arguably the most fascinating feature of any area of Carboniferous limestone. They develop after the rock has been exposed by the scouring action of an
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Streams flowing from higher impermeable slopes sink into the ground when they reach permeable limestone. During dry spells all water sinks very quickly on reaching the limestone, through
888:. In wetter conditions water flows a greater distance across the limestone as underground channels and chambers fill up. Large sinkholes are called 'swallowholes' or 'potholes'. 810:
Carboniferous Limestone has horizontal layers (beds) with bedding planes, and vertical joints. These joints are weaknesses in the rock, which are exploited by agents of both
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block is identified as a separate northern province. It is characterised by the presence of numerous ‘blocks’ and ‘basins’ each with its own particular depositional style.
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The Carboniferous Limestone is a significant landscape-forming rock unit in each of the depositional provinces of Great Britain within which it is found.
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in the east. Though of Carboniferous age, the limestones of this Scottish province are not assigned to the Carboniferous Limestone Supergroup.
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was deposited as marine sediments in three distinct ‘provinces’ separated by contemporary landmasses. One of these landmasses was the
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is an excellent example. It was formed originally by a subglacial meltwater stream which existed during the last major
1432: 121: 70: 255:. The Carboniferous Limestone sequence of South Wales and the Bristol area is currently (2012) subdivided thus: 1407: 59: 1397: 1412: 412: 1387: 807:
are frequently in evidence as components of Carboniferous Limestone; indeed the rock is full of fossils.
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The 'classic limestone walk' is a circular 10 km route from the field centre on the north side of
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are formed from Carboniferous Limestone, showing notable geomorphological features, including
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Within Pembrokeshire the Carboniferous Limestone forms the spectacular coastal cliffs at
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The limestone found north of the Wales-London-Brabant Massif and south of the emergent
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Cross-section of Carboniferous Limestone bored by Jurassic organisms; borings include
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in the Pennines), it is sufficiently pure for production of chemical-grade lime.
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Surface depressions, typically funnel-shaped and variously known as shakeholes,
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where it turns southwards. A very narrow ‘east crop’ and ‘south crop’ run by
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Limestone deposited during the Dinantian Epoch of the Carboniferous Period
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British Geological Survey 1:50,000 scale map series sheet E261/2 Bridgend
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To the north of the Southern Uplands are the limestones of the Scottish
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to the Northumberland Coast where it extends to the Scottish border at
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and through which deep gorges have been cut by rivers such as the Wye,
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Caves are common subsurface features in limestone landscapes. In the
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In Ireland there is a large number of show caves open to visitors -
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and wraps around the northern margin of the Lake District as far as
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Within Great Britain the suite of rocks known traditionally as the
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wherever it outcrops, particularly in the Mendips and north Wales.
589:. The Carboniferous Limestone belt extends eastwards to form the 451:. It then runs near the southern margin of the national park via 1168:
British Geological Survey 1:50,000 scale map series sheet E244/5
915: 606: 538: 475:. West of the bay, the rock forms the renowned southern coast of 464: 325: 220: 158: 1216:
British Geological Survey 1:50,000 scale map series sheets E246
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is named for the limestone which characterises the heart of the
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British Geological Survey 1:50,000 scale map series sheet E232
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British Geological Survey 1:50,000 scale map series sheet E229
1074: 950: 946: 610: 558: 452: 207:, an east–west aligned belt of land stretching through central 1051:
manufacture at plants in England, Wales, Scotland and Ireland.
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The Carboniferous Limestone is widespread throughout Ireland.
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and in a very broken band running northeastwards through the
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North again, it is a major landscape forming feature in the
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British Geological Survey 1:50,000 scale special map sheet
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British Geological Survey 1:50,000 scale special map sheet
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British Geological Survey 1:50,000 scale map E48 Ulverston
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British Geological Survey 1:625,000 scale geological map
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To the north the limestone is exposed once again in east
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Abercriban Oolite Subgroup & Clydach Valley Subgroup
892:, Alum Pot and the Buttertubs are well-known examples. 687:
with coastal exposures around the northern margins of
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and continuing as a broken outcrop southwards beyond
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Carboniferous Limestone occurs most famously around
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Castell Coch Limestone Formation (lowermost/oldest)
62:. Unsourced material may be challenged and removed. 1265:British Geological Survey 1:50,000 scale maps E94 251:. These rocks continue eastwards at depth beneath 1350:British Geological Survey 1:50,000 scale map E28 1321:British Geological Survey 1:50,000 scale map E40 1301:British Geological Survey 1:50,000 scale map E99 1374: 854:Carboniferous/Jurassic unconformity surface at 557:are prominent in views across the mouth of the 549:are cut in this rock. The limestone islands of 374: 1054:In ground form, it is used for power industry 746:. There are limited outcrops on the coasts of 969:, there are numerous caves, three of which – 729: 142:, Wales. Carboniferous/Jurassic unconformity. 675:. There are numerous limestone hills in the 149:is a collective term for the succession of 1403:Limestone formations of the United Kingdom 1145:"British Lower Carboniferous Stratigraphy" 1423:Geologic formations of the United Kingdom 1092:, it was used in combination with nearby 1036:in many places. In certain places (e.g. 895:Dry valleys are valleys without streams. 799:encased in carbonate mud. Fossil corals, 122:Learn how and when to remove this message 849: 838: 564: 342: 186: 133: 487:. There are further occurrences in the 14: 1375: 960: 383:along from which are features such as 338: 182: 1152:Geological Conservation Review Series 1143:Cossey P.J. & Adams A.E. (2004). 981:– are now show caves for the public. 494:An important outlier is that of the 419:and extending westwards through the 60:adding citations to reliable sources 31: 1136: 834: 191:Carboniferous Limestone exposed at 138:Carboniferous Limestone exposed at 24: 1088:when, following the inventions of 793: 569:There are limited outcrops on the 177:Carboniferous Limestone Supergroup 25: 1444: 1077:(in North Wales, where important 866:to the village of Malham, UK via 601:and a zone of country in inland 491:, both inland and on the coast. 435:. The outcrop continues through 268:Oxwich Head Limestone Formation 36: 1356: 1344: 1335: 1315: 1295: 762:and further occurrences around 629:. There are a few outcrops in 161:that were deposited during the 47:needs additional citations for 1418:Geologic formations of Ireland 1383:Carboniferous System of Europe 1259: 1247: 1235: 1226: 1210: 1194: 1174: 1162: 1084:It was important in the early 699:along the western side of the 201:Carboniferous Limestone Series 13: 1: 1393:Geology of the United Kingdom 1129: 734:Limestones occur in southern 407:through Carmarthenshire from 292:Cwmyniscoy Mudstone Formation 227:in the west through southern 1011: 413:Brecon Beacons National Park 375:South Wales and Bristol area 367:, England; scale bar = 1 cm. 274:Honeycombed Sandstone Member 153:occurring widely throughout 7: 1112: 677:Arnside and Silverdale AONB 573:and more extensive ones in 279:Dowlais Limestone Formation 205:Wales-London-Brabant Massif 10: 1449: 1428:Rock formations of Ireland 1170:Pembroke & Linney Head 1119:List of types of limestone 1069:(in the Peak District and 1040:in the Peak District, and 926:and rounded blocks called 773: 730:Midland Valley of Scotland 695:. An outcrop extends from 541:and the coastal cliffs at 1056:flue-gas desulphurisation 957:is an excellent example. 845:Ingleton, North Yorkshire 71:"Carboniferous Limestone" 1433:Rock formations of Wales 1364:Bedrock Geology UK North 260:Pembroke Limestone Group 1081:mines are to be found). 754:, isolated outcrops in 517:The larger part of the 147:Carboniferous Limestone 18:Carboniferous limestone 859: 847: 498:basin which forms the 457:Llangattock escarpment 368: 271:Penderyn Oolite Member 196: 143: 1408:Carboniferous Ireland 1086:Industrial Revolution 1061:In many places it is 1042:Horton in Ribblesdale 853: 843:Carboniferous coral, 842: 635:Titterstone Clee Hill 565:The Northern Province 529:and the show cave of 433:South Wales Coalfield 389:Green Bridge of Wales 346: 265:Oystermouth Formation 262:(uppermost/youngest) 190: 137: 1398:Limestone formations 679:and in the southern 621:escarpment north of 195:, Somerset, England. 56:improve this article 1413:Carboniferous Wales 979:Stump Cross Caverns 961:Subsurface features 870:and back again via 714:and thence through 597:, the neighbouring 339:Geographical extent 183:Depositional basins 1388:Geology of Ireland 1303:Chapel en le Frith 1065:, and has yielded 1021:It is crushed for 908:limestone pavement 860: 848: 720:Berwick-upon-Tweed 577:notably along the 399:and the cliffs at 369: 353:(some with boring 197: 144: 1032:It is burned for 994:Marble Arch Caves 971:Ingleborough Cave 949:is a steep-sided 547:Weston-super-Mare 489:Vale of Glamorgan 350:Gastrochaenolites 132: 131: 124: 106: 16:(Redirected from 1440: 1367: 1360: 1354: 1348: 1342: 1339: 1333: 1319: 1313: 1299: 1293: 1263: 1257: 1251: 1245: 1239: 1233: 1230: 1224: 1214: 1208: 1198: 1192: 1178: 1172: 1166: 1160: 1159: 1149: 1140: 975:White Scar Caves 835:Surface features 828:surface drainage 605:running through 527:Burrington Combe 427:above the upper 312:stretching from 303:Southern Uplands 213:English Midlands 127: 120: 116: 113: 107: 105: 64: 40: 32: 21: 1448: 1447: 1443: 1442: 1441: 1439: 1438: 1437: 1373: 1372: 1371: 1370: 1361: 1357: 1349: 1345: 1340: 1336: 1320: 1316: 1300: 1296: 1264: 1260: 1252: 1248: 1240: 1236: 1231: 1227: 1215: 1211: 1199: 1195: 1179: 1175: 1167: 1163: 1147: 1141: 1137: 1132: 1115: 1014: 967:Yorkshire Dales 963: 897:Watlowes Valley 868:Watlowes Valley 837: 796: 794:Characteristics 776: 732: 685:Whitbarrow Scar 673:Yorkshire Dales 567: 411:, entering the 385:Huntsman's Leap 381:St Govan's Head 377: 341: 320:in the west to 245:Gloucestershire 229:Carmarthenshire 185: 128: 117: 111: 108: 65: 63: 53: 41: 28: 23: 22: 15: 12: 11: 5: 1446: 1436: 1435: 1430: 1425: 1420: 1415: 1410: 1405: 1400: 1395: 1390: 1385: 1369: 1368: 1355: 1343: 1334: 1323:Kirkby Stephen 1314: 1294: 1258: 1246: 1234: 1225: 1209: 1193: 1190:Merthyr Tydfil 1173: 1161: 1134: 1133: 1131: 1128: 1127: 1126: 1121: 1114: 1111: 1110: 1109: 1082: 1059: 1052: 1047:It is used in 1045: 1030: 1013: 1010: 962: 959: 836: 833: 826:, which lacks 795: 792: 775: 772: 740:Pentland Hills 731: 728: 716:Northumberland 712:North Pennines 697:Kirkby Stephen 662:South Pennines 639:Little Wenlock 615:Clwydian Hills 566: 563: 559:Severn Estuary 496:Forest of Dean 441:Pontneddfechan 429:Swansea Valley 421:Black Mountain 405:Carmarthen Bay 393:Stackpole Head 376: 373: 357:in place) and 340: 337: 310:Midland Valley 299: 298: 297: 296: 293: 285: 284: 283: 280: 277: 276: 275: 272: 266: 184: 181: 130: 129: 44: 42: 35: 26: 9: 6: 4: 3: 2: 1445: 1434: 1431: 1429: 1426: 1424: 1421: 1419: 1416: 1414: 1411: 1409: 1406: 1404: 1401: 1399: 1396: 1394: 1391: 1389: 1386: 1384: 1381: 1380: 1378: 1365: 1359: 1353: 1347: 1338: 1332: 1328: 1324: 1318: 1312: 1308: 1304: 1298: 1292: 1288: 1284: 1280: 1276: 1272: 1268: 1262: 1256: 1250: 1244: 1238: 1229: 1223: 1219: 1213: 1207: 1203: 1197: 1191: 1187: 1183: 1177: 1171: 1165: 1157: 1153: 1146: 1139: 1135: 1125: 1124:Blarney Stone 1122: 1120: 1117: 1116: 1107: 1103: 1102:Coal Measures 1099: 1095: 1091: 1090:Abraham Darby 1087: 1083: 1080: 1076: 1072: 1068: 1064: 1063:metalliferous 1060: 1057: 1053: 1050: 1046: 1043: 1039: 1035: 1031: 1028: 1024: 1020: 1019: 1018: 1009: 1006: 1002: 997: 995: 991: 987: 982: 980: 976: 972: 968: 958: 956: 952: 948: 943: 941: 937: 936:dog's mercury 933: 932:hart's tongue 929: 925: 922:to form deep 921: 917: 913: 909: 904: 902: 898: 893: 891: 887: 882: 880: 875: 873: 869: 865: 857: 852: 846: 841: 832: 829: 825: 821: 817: 813: 808: 806: 802: 791: 789: 785: 781: 771: 769: 765: 761: 760:Stirlingshire 757: 753: 749: 745: 741: 737: 727: 725: 721: 717: 713: 708: 706: 702: 698: 694: 693:Humphrey Head 690: 689:Morecambe Bay 686: 682: 681:Lake District 678: 674: 670: 665: 663: 659: 655: 651: 650:Peak District 647: 642: 640: 636: 632: 628: 624: 620: 616: 612: 608: 604: 600: 596: 592: 588: 587:Puffin Island 584: 580: 576: 572: 562: 560: 556: 552: 548: 544: 540: 536: 532: 528: 524: 523:Cheddar Gorge 520: 515: 513: 509: 505: 501: 497: 492: 490: 486: 482: 478: 474: 470: 466: 462: 458: 454: 450: 446: 442: 438: 434: 430: 426: 422: 418: 414: 410: 406: 402: 398: 397:Lydstep Point 394: 390: 386: 382: 372: 366: 362: 361: 356: 352: 351: 345: 336: 333: 331: 327: 323: 319: 315: 311: 306: 304: 294: 291: 290: 289: 286: 281: 278: 273: 270: 269: 267: 264: 263: 261: 258: 257: 256: 254: 250: 246: 242: 241:Monmouthshire 238: 234: 230: 226: 225:Pembrokeshire 222: 218: 214: 210: 206: 202: 194: 189: 180: 178: 174: 171: 170:Carboniferous 167: 164: 160: 156: 155:Great Britain 152: 148: 141: 140:Ogmore-by-Sea 136: 126: 123: 115: 112:November 2012 104: 101: 97: 94: 90: 87: 83: 80: 76: 73: –  72: 68: 67:Find sources: 61: 57: 51: 50: 45:This article 43: 39: 34: 33: 30: 19: 1363: 1358: 1351: 1346: 1337: 1330: 1326: 1322: 1317: 1310: 1306: 1302: 1297: 1290: 1286: 1282: 1278: 1274: 1270: 1266: 1261: 1254: 1249: 1242: 1237: 1228: 1221: 1217: 1212: 1205: 1201: 1196: 1189: 1185: 1181: 1176: 1169: 1164: 1155: 1151: 1138: 1015: 998: 983: 964: 955:Gordale Scar 944: 905: 894: 883: 876: 872:Gordale Scar 861: 856:Tedbury Camp 820:permeability 809: 797: 790:landscapes. 784:County Clare 777: 752:Berwickshire 748:East Lothian 733: 724:Solway Firth 709: 705:Cleator Moor 701:Vale of Eden 666: 643: 603:Denbighshire 585:and towards 579:Menai Strait 568: 519:Mendip Hills 516: 493: 481:Mumbles Head 437:Ystradfellte 378: 370: 365:Mendip Hills 358: 348: 334: 330:Berwickshire 307: 300: 219:and on into 200: 198: 193:Tedbury Camp 176: 146: 145: 118: 109: 99: 92: 85: 78: 66: 54:Please help 49:verification 46: 29: 1243:Isle of Man 1202:Abergavenny 990:Ailwee Cave 940:Malham Cove 920:carbonation 890:Gaping Gill 864:Malham Tarn 801:brachiopods 671:and in the 599:Little Orme 571:Isle of Man 531:Wookey Hole 469:Swansea Bay 449:Pontsticill 253:Oxfordshire 217:East Anglia 1377:Categories 1352:Whitehaven 1220:& 247 1218:Worms Head 1188:& 231 1182:Carmarthen 1130:References 1079:Bronze Age 1005:stalactite 1001:stalagmite 816:weathering 812:denudation 780:The Burren 669:Lancashire 646:White Peak 631:Shropshire 623:Llangollen 591:Great Orme 555:Steep Holm 535:Avon Gorge 504:Wye Valley 485:Worms Head 360:Trypanites 288:Avon Group 247:and north 235:and south 151:limestones 82:newspapers 1366:NERC 2007 1311:Ashbourne 1275:Liverpool 1267:Llandudno 1186:Ammanford 1108:industry. 1100:from the 1098:ironstone 1027:aggregate 1023:roadstone 1012:Economics 986:Crag Cave 912:ice sheet 886:sinkholes 879:sinkholes 768:Dumbarton 744:Edinburgh 595:Llandudno 581:, around 551:Flat Holm 473:Porthcawl 417:Llandyfan 233:Glamorgan 163:Dinantian 1291:Oswestry 1255:Anglesey 1113:See also 1071:Weardale 1038:Tunstead 805:crinoids 764:Greenock 742:towards 736:Ayrshire 691:such as 658:Manifold 633:such as 627:Oswestry 619:Eglwyseg 583:Benllech 575:Anglesey 543:Clevedon 537:west of 508:Chepstow 479:between 461:Blorenge 455:and the 445:Penderyn 425:Cribarth 409:Kidwelly 387:and the 355:bivalves 314:Ayrshire 249:Somerset 211:and the 1309:, E124 1305:, E111 1289:, E137 1287:Wrexham 1285:, E121 1281:, E108 1279:Denbigh 1277:, E107 1222:Swansea 1206:Newport 1158:: 1–12. 1104:in the 1073:), and 916:glacier 901:Ice Age 774:Ireland 637:and at 607:Denbigh 539:Bristol 502:of the 465:Cwmbran 326:Lothian 221:Belgium 168:of the 159:Ireland 96:scholar 1331:Settle 1329:, E60 1325:, E50 1307:Buxton 1273:, E96 1269:, E95 1204:, 249 1184:, 230 1075:copper 1049:cement 951:valley 928:clints 924:grykes 611:Ruthin 533:. The 500:cliffs 453:Trefil 173:Period 98:  91:  84:  77:  69:  1327:Hawes 1283:Flint 1148:(PDF) 947:gorge 824:karst 788:karst 683:e.g. 477:Gower 401:Tenby 318:Arran 237:Powys 209:Wales 166:Epoch 103:JSTOR 89:books 1271:Rhyl 1106:iron 1096:and 1094:coal 1067:lead 1034:lime 1025:and 1003:and 999:The 992:and 977:and 934:and 814:and 803:and 766:and 758:and 756:Fife 750:and 656:and 654:Dove 644:The 609:and 553:and 545:and 512:Undy 483:and 447:and 395:and 328:and 322:Fife 316:and 157:and 75:news 914:or 782:in 593:at 510:to 471:at 459:to 439:to 423:to 415:at 239:to 215:to 58:by 1379:: 1156:29 1154:. 1150:. 996:. 988:, 973:, 945:A 906:A 874:. 770:. 726:. 707:. 664:. 641:. 561:. 525:, 514:. 443:, 363:; 324:, 243:, 231:, 179:. 1058:. 858:. 125:) 119:( 114:) 110:( 100:· 93:· 86:· 79:· 52:. 20:)

Index

Carboniferous limestone

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Ogmore-by-Sea
limestones
Great Britain
Ireland
Dinantian
Epoch
Carboniferous
Period

Tedbury Camp
Wales-London-Brabant Massif
Wales
English Midlands
East Anglia
Belgium
Pembrokeshire
Carmarthenshire

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