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Cirque

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weathering and glacial erosion. Ice segregation erodes the vertical rock face and causes it to disintegrate, which may result in an avalanche bringing down more snow and rock to add to the growing glacier. Eventually, this hollow may become large enough that glacial erosion intensifies. The enlarging
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forms when the movement of the glacier separates the moving ice from the stationary ice, forming a crevasse. The method of erosion of the headwall lying between the surface of the glacier and the cirque's floor has been attributed to freeze-thaw mechanisms. The temperature within the bergschrund
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Cirques form in conditions which are favorable; in the Northern Hemisphere the conditions include the north-east slope, where they are protected from the majority of the Sun's energy and from the prevailing winds. These areas are sheltered from heat, encouraging the accumulation of snow; if the
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The concave shape of a glacial cirque is open on the downhill side, while the cupped section is generally steep. Cliff-like slopes, down which ice and glaciated debris combine and converge, form the three or more higher sides. The floor of the cirque ends up bowl-shaped, as it is the complex
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changes very little, however, studies have shown that ice segregation (frost shattering) may happen with only small changes in temperature. Water that flows into the bergschrund can be cooled to freezing temperatures by the surrounding ice, allowing freeze-thaw mechanisms to occur.
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Distinguishing signal from noise: Long-term studies of vegetation in Makhtesh Ramon erosion cirque, Negev desert, Israel ; David Ward, David Saltz and Linda Olsvig-Whittaker; Plant Ecology, 2000, Volume 150, Numbers 1–2, pp.
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Although a less common usage, the term cirque is also used for amphitheatre-shaped, fluvial-erosion features. For example, an approximately 200 square kilometres (77 sq mi) anticlinal erosion cirque is at
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Glacial cirques are found amongst mountain ranges throughout the world; 'classic' cirques are typically about one kilometer long and one kilometer wide. Situated high on a mountainside near the
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dammed by either till (debris) or a bedrock threshold. When enough snow accumulates, it can flow out the opening of the bowl and form valley glaciers which may be several kilometers long.
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below the level of the cirque's low-side outlet (stage) and its down-slope (backstage) valley. If the cirque is subject to seasonal melting, the floor of the cirque most often forms a
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Johnny W. Sanders; Kurt M. Cuffey; Jeffrey R. Moore; Kelly R. MacGregor; Jeffrey L. Kavanaugh (2012). "Periglacial weathering and headwall erosion in cirque glacier bergschrunds".
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As glaciers can only originate above the snowline, studying the location of present-day cirques provides information on past glaciation patterns and on climate change.
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Early volcanic rocks of rĂ©union and their tectonic significance; B. G. J. Upton and W. J. Wadsworth; Bulletin of Volcanology, 1969, Volume 33, Number 4, pp. 1246–68
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A common feature for all fluvial-erosion cirques is a terrain which includes erosion resistant upper structures overlying materials which are more easily eroded.
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of combining ice flows from multiple directions and their accompanying rock burdens. Hence, it experiences somewhat greater erosion forces and is most often
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of this open ended concavity creates a larger leeward deposition zone, furthering the process of glaciation. Debris (or till) in the ice also may
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landscapes, is formed by intermittent river flow cutting through layers of limestone and chalk leaving sheer cliffs. A common feature for all
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Rempel, A.W.; Wettlaufer, J.S.; Worster, M.G. (2001). "Interfacial Premelting and the Thermomolecular Force: Thermodynamic Buoyancy".
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cutting through layers of limestone and chalk, resulting in cirque walls with a sheer 200 metres (660 ft) drop. The
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shape in the side of the mountain, with the headwall being weathered by ice segregation, and as well as being eroded by
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Encyclopedia of Earth Sciences Series: Encyclopedia of Paleoclimatology and Ancient Environments
495:). Three cirques have eroded there in a sequence of agglomerated, fragmented rock and volcanic 1826: 1789: 1613: 1330: 1217: 1064: 965: 936: 689: 457: 1894: 1879: 1863: 1831: 1731: 1628: 1558: 1420: 1299: 1138: 1056: 1011: 928: 845: 820: 785: 727: 679: 633: 585: 538: 492: 369: 310: 138: 188: 1726: 1701: 1583: 1496: 1385: 925: 839: 629: 570: 346: 259: 246:, the side at which the glacier flowed away from the cirque. Many glacial cirques contain 199: 74: 463: 1134: 1052: 1007: 334:
is created. In some cases, this peak will be made accessible by one or more arĂȘtes. The
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the bed surface; should ice move down a slope it would have a 'sandpaper effect' on the
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accumulation of snow increases, the snow turns into glacial ice. The process of
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Area. Institute of British Geographers, 6: 150–53 regarding term usage.
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Yet another type of fluvial erosion-formed cirque is found on
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This concern is not new, see Evans, I.S. & N. Cox, 1974:
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Geomorphometry and the operational definition of cirques,
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follows, whereby a hollow in a slope may be enlarged by
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If two adjacent cirques erode toward one another, an
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An amphitheatre-like valley formed by glacial erosion
1091:"Mt Field National Park: Landforms, Flora and Fauna" 436: 165: 1750: 1689: 1566: 1557: 1526: 1505: 1429: 1318: 1247: 483:. The island consists of an active shield-volcano ( 848: â€“ Landform created by the action of glaciers 924:. Cirques. Vol. 1358. Springer Netherlands: 41:Two cirques with semi-permanent snowpatches near 1225: 1205:Photographs and case study of corrie glaciers 989: 987: 444:was formed by intermittent river flow in the 8: 484: 461: 63: 960:. In Chorley R.J. & Carson M.A. (ed.). 345:Where cirques form one behind the other, a 113: 79: 1900:Geographical terminology in mountaineering 1563: 1232: 1218: 1210: 294:Eventually, the hollow may become a large 96:. Alternative names for this landform are 491:) and an extinct, deeply eroded volcano ( 503:overlain by more coherent, solid lavas. 1854: 886: 863: 230:. The highest cliff is often called a 1185:"Go Walk: Coumshingaun, Co Waterford" 128: 73: 7: 920:Knight, Peter G. (2009). "Cirques". 541:cirque, headwall and spring skiers, 452:is another such feature, created in 192:Formation of cirque and resulting 25: 1115:Barr, I.D.; Spagnolo, M. (2015). 962:Introduction to fluvial processes 1857: 1837:Template:Periglacial environment 430:on the southern boundary of the 364:Fluvial-erosion cirque formation 218:Glacial-erosion cirque formation 1143:10.1016/j.earscirev.2015.10.004 421:Negev anticlinal erosion cirque 342:is an example of such a peak. 271:beneath, on which it scrapes. 53:Upper Thornton Lake Cirque in 1: 1061:10.1103/PhysRevLett.87.088501 157:, or a lip of the underlying 933:10.1007/978-1-4020-4411-3_37 284:North Cascades National Park 234:. The fourth side forms the 55:North Cascades National Park 437: 434:. This erosional cirque or 166: 1916: 799:Great Basin and others on 367: 29: 1817: 700: 485: 462: 114: 64: 747:, Grands Causses, France 741:, Grands Causses, France 1040:Physical Review Letters 906:EncyclopĂŠdia Britannica 751:Cirque du Bout du Monde 745:Cirque du Bout du Monde 450:Cirque du Bout du Monde 384:Cirque du Bout du Monde 316:Mt. Field National Park 32:Cirque (disambiguation) 788:cirque, and others on 559: 545: 526: 386: 323: 291: 214: 196: 164:The fluvial cirque or 124:for 'valley'; 105: 80: 78:; from the Latin word 58: 46: 1775:Giant current ripples 1122:Earth-Science Reviews 551: 537: 512: 487:Piton de la Fournaise 460:of the department of 381: 368:Further information: 313: 277: 202: 191: 52: 40: 956:Evans, I.S. (1971). 766:Cirque of the Towers 739:Cirque de Navacelles 286:is a well-developed 280:Lower Curtis Glacier 43:Abisko National Park 30:For other uses, see 1712:Moraine-dammed lake 1539:Subglacial eruption 1135:2015ESRv..151...48B 1053:2001PhRvL..87h8501R 1008:2012Geo....40..779S 927:. pp. 155–56. 726:Coumshingaun Lake, 702:Coire an t-Sneachda 405: /  349:results, as at the 108:, meaning a pot or 1544:Subglacial volcano 1527:Volcanic relations 712:Scottish Highlands 708:Grampian Mountains 696:Mountain, Bulgaria 690:Banderishki cirque 686:Mountain, Bulgaria 676:Mountain, Bulgaria 666:Mountain, Bulgaria 640:Cirque de Gavarnie 560: 553:Cirque de Gavarnie 546: 527: 387: 324: 292: 215: 197: 59: 47: 1890:Glacial landforms 1845: 1844: 1813: 1812: 1331:Accumulation zone 971:978-0-416-68820-7 942:978-1-4020-4551-6 735:Europe (fluvial) 620:Europe (glacial) 525:in the background 410:30.583°N 34.750°E 16:(Redirected from 1907: 1862: 1861: 1860: 1853: 1732:Terminal moraine 1564: 1300:Piedmont glacier 1234: 1227: 1220: 1211: 1193: 1192: 1180: 1174: 1171: 1165: 1161: 1155: 1154: 1112: 1106: 1105: 1103: 1102: 1087: 1081: 1080: 1034: 1028: 1027: 1016:10.1130/G33330.1 991: 982: 981: 979: 978: 953: 947: 946: 917: 911: 910: 902: 891: 875: 868: 846:Glacial landform 821:Tuckerman Ravine 728:County Waterford 705: 704: 680:Seven Rila Lakes 650:Cirque d'EstaubĂ© 634:Sierra de Gredos 586:Himachal Pradesh 567:Blue Lake Cirque 539:Tuckerman Ravine 499:associated with 493:Piton des Neiges 490: 489: 467: 466: 456:terraine in the 442: 429: 428: 426: 425: 424: 422: 417: 416: 411: 406: 403: 402: 401: 398: 370:Steephead valley 338:in the European 171: 139:convergence zone 132: 127: 119: 118: 83: 77: 72: 67: 66: 21: 1915: 1914: 1910: 1909: 1908: 1906: 1905: 1904: 1870: 1869: 1868: 1858: 1856: 1848: 1846: 1841: 1809: 1746: 1727:Sevetti moraine 1685: 1639:Roche moutonnĂ©e 1584:Cirque stairway 1553: 1522: 1501: 1425: 1386:Lateral moraine 1314: 1243: 1238: 1201: 1196: 1189:The Irish Times 1182: 1181: 1177: 1172: 1168: 1162: 1158: 1114: 1113: 1109: 1100: 1098: 1089: 1088: 1084: 1036: 1035: 1031: 993: 992: 985: 976: 974: 972: 955: 954: 950: 943: 919: 918: 914: 893: 892: 888: 879: 878: 869: 865: 855: 840:Cirque stairway 836: 772:, United States 630:Circo de Gredos 591:Cirque Valley, 571:New South Wales 532: 530:Notable cirques 458:Burgundy region 432:Negev highlands 420: 418: 414: 412: 408: 407: 404: 399: 396: 394: 392: 391: 376: 366: 347:cirque stairway 260:ice segregation 220: 186: 125: 102:Scottish Gaelic 94:glacial erosion 70: 35: 28: 23: 22: 15: 12: 11: 5: 1913: 1911: 1903: 1902: 1897: 1892: 1887: 1882: 1872: 1871: 1867: 1866: 1843: 1842: 1840: 1839: 1834: 1829: 1824: 1818: 1815: 1814: 1811: 1810: 1808: 1807: 1802: 1797: 1792: 1787: 1782: 1777: 1772: 1767: 1762: 1756: 1754: 1748: 1747: 1745: 1744: 1739: 1734: 1729: 1724: 1719: 1714: 1709: 1704: 1699: 1693: 1691: 1687: 1686: 1684: 1683: 1676: 1671: 1666: 1661: 1656: 1651: 1646: 1641: 1636: 1631: 1626: 1621: 1619:Hanging valley 1616: 1614:Glacial striae 1611: 1606: 1601: 1596: 1591: 1586: 1581: 1576: 1570: 1568: 1561: 1555: 1554: 1552: 1551: 1546: 1541: 1536: 1530: 1528: 1524: 1523: 1521: 1520: 1515: 1509: 1507: 1503: 1502: 1500: 1499: 1494: 1489: 1484: 1479: 1477:Periglaciation 1474: 1469: 1467:Outburst flood 1464: 1459: 1454: 1449: 1444: 1439: 1433: 1431: 1427: 1426: 1424: 1423: 1418: 1413: 1408: 1403: 1398: 1393: 1391:Medial moraine 1388: 1383: 1378: 1376:Glacier tongue 1373: 1368: 1363: 1358: 1353: 1348: 1343: 1338: 1333: 1328: 1322: 1320: 1316: 1315: 1313: 1312: 1310:Valley glacier 1307: 1302: 1297: 1295:Outlet glacier 1292: 1287: 1282: 1277: 1272: 1267: 1262: 1257: 1251: 1249: 1245: 1244: 1239: 1237: 1236: 1229: 1222: 1214: 1208: 1207: 1200: 1199:External links 1197: 1195: 1194: 1183:John O'Dwyer. 1175: 1166: 1156: 1107: 1082: 1029: 1002:(9): 779–782. 983: 970: 948: 941: 912: 900:"Corrie"  897:, ed. (1911). 895:Chisholm, Hugh 885: 877: 876: 862: 861: 854: 851: 850: 849: 843: 835: 832: 831: 830: 829: 828: 818: 808: 801:Mount Katahdin 797: 790:Mount Blue Sky 783: 776:Iceberg Cirque 773: 762:North America 760: 759: 758: 748: 742: 733: 732: 731: 724: 714: 697: 687: 677: 667: 657: 647: 637: 627: 618: 617: 616: 606: 599:Makhtesh Ramon 596: 589: 576: 575: 574: 531: 528: 477:RĂ©union island 446:Makhtesh Ramon 415:30.583; 34.750 365: 362: 332:pyramidal peak 288:cirque glacier 219: 216: 185: 182: 75:[siʁk] 26: 24: 18:Cwm (landform) 14: 13: 10: 9: 6: 4: 3: 2: 1912: 1901: 1898: 1896: 1893: 1891: 1888: 1886: 1883: 1881: 1878: 1877: 1875: 1865: 1855: 1851: 1838: 1835: 1833: 1830: 1828: 1825: 1823: 1820: 1819: 1816: 1806: 1803: 1801: 1798: 1796: 1793: 1791: 1788: 1786: 1783: 1781: 1778: 1776: 1773: 1771: 1768: 1766: 1763: 1761: 1758: 1757: 1755: 1753: 1752:Glaciofluvial 1749: 1743: 1742:Veiki moraine 1740: 1738: 1735: 1733: 1730: 1728: 1725: 1723: 1722:Rogen moraine 1720: 1718: 1717:Pulju moraine 1715: 1713: 1710: 1708: 1705: 1703: 1702:Erratic block 1700: 1698: 1695: 1694: 1692: 1688: 1682: 1681: 1677: 1675: 1672: 1670: 1667: 1665: 1664:Tunnel valley 1662: 1660: 1659:Trough valley 1657: 1655: 1652: 1650: 1647: 1645: 1642: 1640: 1637: 1635: 1632: 1630: 1627: 1625: 1622: 1620: 1617: 1615: 1612: 1610: 1607: 1605: 1602: 1600: 1597: 1595: 1592: 1590: 1589:Crag and tail 1587: 1585: 1582: 1580: 1577: 1575: 1572: 1571: 1569: 1565: 1562: 1560: 1556: 1550: 1547: 1545: 1542: 1540: 1537: 1535: 1532: 1531: 1529: 1525: 1519: 1516: 1514: 1511: 1510: 1508: 1504: 1498: 1495: 1493: 1490: 1488: 1485: 1483: 1480: 1478: 1475: 1473: 1472:Overdeepening 1470: 1468: 1465: 1463: 1460: 1458: 1455: 1453: 1450: 1448: 1447:Basal sliding 1445: 1443: 1440: 1438: 1435: 1434: 1432: 1428: 1422: 1419: 1417: 1414: 1412: 1409: 1407: 1404: 1402: 1399: 1397: 1394: 1392: 1389: 1387: 1384: 1382: 1379: 1377: 1374: 1372: 1369: 1367: 1364: 1362: 1359: 1357: 1354: 1352: 1349: 1347: 1344: 1342: 1339: 1337: 1334: 1332: 1329: 1327: 1326:Ablation zone 1324: 1323: 1321: 1317: 1311: 1308: 1306: 1303: 1301: 1298: 1296: 1293: 1291: 1288: 1286: 1283: 1281: 1278: 1276: 1273: 1271: 1268: 1266: 1263: 1261: 1258: 1256: 1253: 1252: 1250: 1246: 1242: 1235: 1230: 1228: 1223: 1221: 1216: 1215: 1212: 1206: 1203: 1202: 1198: 1190: 1186: 1179: 1176: 1170: 1167: 1160: 1157: 1152: 1148: 1144: 1140: 1136: 1132: 1128: 1124: 1123: 1118: 1111: 1108: 1097:on 2011-06-09 1096: 1092: 1086: 1083: 1078: 1074: 1070: 1066: 1062: 1058: 1054: 1050: 1047:(8): 088501. 1046: 1042: 1041: 1033: 1030: 1025: 1021: 1017: 1013: 1009: 1005: 1001: 997: 990: 988: 984: 973: 967: 963: 959: 952: 949: 944: 938: 934: 930: 926: 923: 916: 913: 908: 907: 901: 896: 890: 887: 884: 883: 873: 867: 864: 860: 859: 852: 847: 844: 841: 838: 837: 833: 826: 825:New Hampshire 822: 819: 816: 815:New Hampshire 812: 809: 806: 802: 798: 795: 791: 787: 784: 781: 777: 774: 771: 767: 764: 763: 761: 756: 752: 749: 746: 743: 740: 737: 736: 734: 729: 725: 722: 718: 717:ƚnieĆŒne KotƂy 715: 713: 709: 703: 698: 695: 691: 688: 685: 681: 678: 675: 671: 668: 665: 661: 658: 655: 651: 648: 645: 641: 638: 635: 631: 628: 625: 622: 621: 619: 614: 610: 607: 604: 600: 597: 594: 590: 587: 583: 580: 579: 577: 572: 568: 565: 564: 562: 561: 558: 554: 550: 544: 543:New Hampshire 540: 536: 529: 524: 523:Mount Everest 520: 516: 511: 507: 504: 502: 498: 494: 488: 482: 478: 473: 471: 465: 459: 455: 451: 447: 443: 441: 440: 433: 427: 385: 380: 375: 371: 363: 361: 358: 356: 352: 348: 343: 341: 337: 333: 329: 321: 317: 312: 308: 305: 301: 297: 289: 285: 281: 276: 272: 270: 266: 261: 257: 251: 249: 245: 241: 237: 233: 229: 225: 217: 213: 209: 205: 201: 195: 190: 183: 181: 179: 175: 170: 169: 162: 160: 156: 152: 148: 144: 140: 134: 131: 130:[kʊm] 123: 117: 111: 107: 103: 99: 95: 91: 87: 82: 76: 68: 56: 51: 44: 39: 33: 19: 1690:Depositional 1680:Zungenbecken 1678: 1609:Glacial lake 1604:Glacial horn 1578: 1518:Mass balance 1506:Measurements 1442:Accumulation 1366:Glacier head 1361:Glacier cave 1305:Rock glacier 1259: 1188: 1178: 1169: 1159: 1126: 1120: 1110: 1099:. 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Retrieved 961: 951: 921: 915: 904: 889: 881: 880: 871: 866: 857: 856: 624:Cadair Idris 613:Khumbu Himal 603:Negev desert 582:Chandra Taal 505: 501:pillow lavas 481:Indian Ocean 474: 435: 388: 359: 355:Black Forest 351:Zastler Loch 344: 325: 293: 252: 243: 239: 235: 221: 163: 155:glacial till 143:overdeepened 135: 115: 97: 86:amphitheatre 62: 60: 1795:Outwash fan 1790:Kettle hole 1674:Valley step 1654:Trough lake 1634:Ribbon lake 1594:Finger lake 1336:Bergschrund 786:Summit Lake 609:Western Cwm 573:, Australia 515:Western Cwm 413: / 314:Lake Seal, 304:bergschrund 172:, found in 1885:Glaciology 1874:Categories 1822:Glaciology 1805:Urstromtal 1785:Kame delta 1737:Till plain 1534:Jökulhlaup 1492:Starvation 1371:Ice divide 1285:Ice stream 1101:2009-05-12 977:2010-01-24 853:References 811:Great Gulf 730:, Ireland 721:Karkonosze 670:Malyovitsa 595:, Pakistan 593:Hindu Kush 563:Australia 419: ( 336:Matterhorn 210:Mountain, 206:cirque in 126:pronounced 92:formed by 1864:Mountains 1567:Erosional 1559:Landforms 1430:Processes 1411:Randkluft 1406:Penitente 1351:Dirt cone 1280:Ice shelf 1275:Ice sheet 1270:Ice field 1024:128580365 882:Citations 682:cirques, 555:, French 517:with the 464:CĂŽte-d'Or 240:threshold 224:firn line 184:Formation 1827:Category 1765:Diluvium 1760:Alpentor 1669:U-valley 1513:Ice core 1482:Plucking 1437:Ablation 1421:Terminus 1346:Crevasse 1341:Blue ice 1241:Glaciers 1151:54921081 1077:10308635 1069:11497990 834:See also 794:Colorado 757:, France 755:Burgundy 723:, Poland 672:cirque, 662:cirque, 656:, France 654:Pyrenees 646:, France 644:Pyrenees 605:, Israel 557:Pyrenees 521:face of 439:makhtesh 374:Makhtesh 320:Tasmania 300:plucking 256:nivation 232:headwall 212:Bulgaria 168:makhtesh 110:cauldron 84:) is an 45:, Sweden 1895:Oronyms 1880:Cirques 1707:Moraine 1697:Drumlin 1624:Nunatak 1487:Retreat 1452:Calving 1396:Moraine 1381:Icefall 1319:Anatomy 1290:Ledoyom 1265:Ice cap 1131:Bibcode 1049:Bibcode 1004:Bibcode 996:Geology 780:Montana 770:Wyoming 660:Maritsa 636:, Spain 626:, Wales 615:, Nepal 588:, India 497:breccia 400:34°45â€ČE 397:30°35â€ČN 353:in the 269:bedrock 204:Maritsa 178:fluvial 159:bedrock 151:moraine 71:French: 1850:Portal 1800:Sandur 1644:Suncup 1629:P-form 1579:Cirque 1462:Motion 1401:Moulin 1260:Cirque 1255:Aufeis 1149:  1129:: 48. 1075:  1067:  1022:  968:  939:  519:Lhotse 470:France 265:abrade 228:cliffs 112:) and 100:(from 98:corrie 90:valley 88:-like 81:circus 65:cirque 57:, U.S. 1770:Esker 1599:Fjord 1574:ArĂȘte 1497:Surge 1457:Creep 1416:SĂ©rac 1248:Types 1164:27–36 1147:S2CID 1073:S2CID 1020:S2CID 858:Notes 805:Maine 694:Pirin 578:Asia 454:karst 328:arĂȘte 248:tarns 174:karst 122:Welsh 106:coire 1832:List 1780:Kame 1649:Tarn 1549:Tuya 1356:Firn 1065:PMID 966:ISBN 937:ISBN 827:, US 817:, US 807:, US 796:, US 782:, US 684:Rila 674:Rila 664:Rila 513:The 382:The 372:and 340:Alps 296:bowl 278:The 244:sill 208:Rila 194:tarn 147:tarn 1139:doi 1127:151 1057:doi 1012:doi 929:doi 468:in 282:in 242:or 236:lip 116:cwm 1876:: 1187:. 1145:. 1137:. 1125:. 1119:. 1071:. 1063:. 1055:. 1045:87 1043:. 1018:. 1010:. 1000:40 998:. 986:^ 935:. 903:. 823:, 813:, 803:, 792:, 778:, 768:, 753:, 719:, 710:, 706:, 692:, 652:, 642:, 632:, 611:, 601:, 584:, 569:, 472:. 357:. 318:, 238:, 161:. 153:, 104:: 61:A 1852:: 1233:e 1226:t 1219:v 1191:. 1153:. 1141:: 1133:: 1104:. 1079:. 1059:: 1051:: 1026:. 1014:: 1006:: 980:. 945:. 931:: 423:) 120:( 69:( 34:. 20:)

Index

Cwm (landform)
Cirque (disambiguation)

Abisko National Park

North Cascades National Park
[siʁk]
amphitheatre
valley
glacial erosion
Scottish Gaelic
cauldron
Welsh
[kʊm]
convergence zone
overdeepened
tarn
moraine
glacial till
bedrock
makhtesh
karst
fluvial

tarn

Maritsa
Rila
Bulgaria
firn line

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