Knowledge (XXG)

Wisconsin glaciation

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610: 877: 94: 31: 863: 2090: 627:, water would begin to pond in the divide between a moraine and the ice front. The ice would act as a dam as water could not drain through the ice sheet, which in the Wisconsin period covered most of the proglacial river valleys. Numerous small, isolated water bodies formed between the moraine and the ice front. As the ice sheet would continue to melt and recede northward, these ponds combined into 631:. In areas without an available outlet, the water levels would either continue to rise until reaching one or more low spots along the rim of a moraine, or the ice sheet would retreat, opening access to a lower portion of the moraine. Multiple outlets could form through low spots too until one would become dominant after erosion lowered both the outlet and lake surface. 814:
North American flora and fauna species were distributed quite differently during the Wisconsin era, due to altered temperatures, surface water distribution, and in some cases coverage of earth surface by glaciers. A number of scientific studies have been conducted to determine species distribution,
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glacial topography that its glaciers extended over. The Late Wisconsin ice sheet extended more towards the west than the earlier movements. This may have been due to changes in the accumulation center of the ice sheet, topographic changes introduced by the Early phase or by pressure changes in the
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Two related movements have been termed Wisconsin: Early Wisconsin and Late Wisconsin. The Early Wisconsin was the bigger of the two and extended farther west and south. It retreated an unknown distance before halting. During this period of quiet, the glacial deposits were eroded and weathered.
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Correlation of Wisconsin Glacial Maxima; Ernst Antevs; ca 1943; The Quaternary Geology of Southeastern Wisconsin with a Chapter on the Older Rock Formations, Professional Paper 106; William C. Alden; United States Geological Survey; Government Printing Office, Washington, D.C.;
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Northern Washington, Idaho, and Montana to the Continental Divide – north of Edmonton – 65 miles east of Edmonton – northwest corner of North Dakota – Des Moines – west end of Lake Superior – Milwaukee – Port Huron – Buffalo – Schuylerville – St. Johnsbury.
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Chapter II. Glacial History of the Huron-Erie Basin; Geological Report on Wayne County; W.H. Sherzer; Michigan Geological and Biological Survey, Publication 12, Geological Series 9; Lansing, Michigan; Wynkoop Hallenbeck Crawford Co., State Printers;
601:. The Cordilleran Ice Sheet has more of an Alpine style of many glaciers merged into a whole. The striations made by the ice field in moving over the bedrock show that it moved principally to the west through the passes of the coast range. 70:, which covered the high latitudes of central and eastern North America. This advance was synchronous with global glaciation during the last glacial period, including the North American alpine glacier advance, known as the 1283:
Boellstorff, J (1978). "Chronology of some Late Cenozoic deposits from the central United States and the Ice Ages"(pdf). Transactions of the Nebraska Academy of Science 6: 35–49. Retrieved 2012-04-04.
177:, North America's northernmost point that remained south of the continental ice sheets. During much of the glaciation, sea level was low enough to permit land animals, including 1430: 683:. Till is highly permeable and creates a large ground reserve for water. This formation is highly desirable for human economic development as a source of water. 1876: 557:. The ice moved south some 1,500 miles (2,400 km) into Kansas and Missouri. To the west, it reached 1,000 miles (1,600 km) to the foothills of the 1352:
The southern Laurentide Ice Sheet; Cavid M. Mickelson and Patrick M. Colgan; Department of Geology, University of Wisconsin Madison; Madison, Wisconsin; 2003
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is believed to have allowed human occupation of this area which provided potential access for some of the first humans to move between North America and
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Prehistoric human migration was likely greatly influenced by this last glacial period, as during much of the Wisconsin era, the formation of a
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SERC Media; Glacial Grooves, Central Park; Image 14884 is a 208 by 173 pixel JPEG; Uploaded: Apr5 09; Wayne Powell, CUNY Brooklyn College;
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particularly during the Late Wisconsin and early to mid-Holocene. An example of findings is from the investigation of flora species using
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Attig, John W.; Mickelson, David M. (1999). Glacial processes past and present. Boulder, Colo: The Geological Society of America, Inc.
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from the ice mass. Clays could be moved long distances by moving water, while sand and gravel could not. Thus, sand and gravel
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is an example of a plant present in the early Holocene following Wisconsin glacial retreat, a species no longer present at the
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The Labrador Ice Sheet centered east of Hudson Bay. Expanding towards the southwest, it reached into the eastern edge of
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Rockford, Ill. – Peoria – south of Indianapolis – north of Cincinnati – northwestern Pennsylvania – central Long Island
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Minneapolis – north Wisconsin – south of Chicago – Central Ohio – 50 miles south of Buffalo – Binghamton - Northampton
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developed along the sides and front of the ice sheet; elongated accumulations of this material are known as
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of the North American ice sheet complex, peaking more than 20,000 years ago. This advance included the
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Proglacial lakes formed in the glacier carved Great Lakes basin, as the ice continued its long retreat
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Glacial lobes and sublobes of the southern Laurentide Ice Sheet during the late Wisconsin Glaciation.
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Northern Washington, Idaho, and Montana – northwest North Dakota – east central Iowa - Minneapolis
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Chamberlin, Thomas C. and Salisbury, Rollin T., Geology, 3 Vols. 1906, Vol III., pp. 330-333.
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Maximum glaciation of the Northern Hemisphere (black) during the Quaternary climatic cycles
1939: 1908: 1840: 1822: 1580: 1559: 1481: 1466: 1114: 995: 985: 628: 558: 928: – Period of major glaciations of the Northern Hemisphere (115,000–12,000 years ago) 17: 30: 2075: 1944: 1903: 891: 868: 820: 676: 142: 74:. The Wisconsin glaciation extended from about 75,000 to 11,000 years ago, between the 1329:
Geological Framework and Glaciation of the Eastern Area; Christopher L. Hill; pg 82-98
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would form. The sweeping plain of sand and gravel beyond the ice margin and a
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The Keewatin Ice Sheet began west of Hudson Bay in the Canadian Territory of
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a suture zone between the Laurentide and Cordilleran ice sheets formed the
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Historical names of the "four major" glacials in four regions.
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This glaciation radically altered the geography north of the
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The Cordilleran Ice Sheet has left remnants throughout the
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Table VII – Estimated Age of Glacial Episodes (Leverett)
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by these glaciers can be easily observed. In southwestern
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Ann G. Harris, Esther Tuttle, Sherwood D. Tuttle. 1997.
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Minor lobes: Milwaukee, Two Rivers; Straits of Mackinac
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Why geography matters: three challenges facing America
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samples in present-day northern Arizona. Here in the
58:; the Innuitian ice sheet, which extended across the 922: – Cylindrical sample drilled from an ice sheet 1953: 1927: 1896: 1759: 1694: 1678: 1619: 1568: 1527: 1520: 1444: 1230:http://serc.carleton.edu/details/images/14884.html 841:has been a continuously present understory plant. 639:Ice melt and rainfall carried large quantities of 623:Whenever the ice sheet melted from the north at a 910: – Prehistoric lake that became Lake Ontario 835:were early to mid-Holocene dominant trees, while 1877:Withrow Moraine and Jameson Lake Drumlin Field 894: – Geological region in the Midwestern US 1424: 605:Formation of proglacial and prehistoric lakes 8: 1871:Two Creeks Buried Forest State Natural Area 214:This first Wisconsin period erased all the 1691: 1616: 1524: 1431: 1417: 1409: 1339: 1337: 1335: 1253: 1251: 1249: 1247: 1245: 1243: 1241: 1239: 1237: 1210:Geology of National Parks: Fifth Edition 1088: 956: 690: 402: 322: 221: 1325: 1323: 1321: 1319: 1317: 1315: 1313: 1311: 1309: 1201: 1805:Ice Age Floods National Geologic Trail 1769:Chippewa Moraine State Recreation Area 1389:, GlobalTwitcher.com, ed. N. Stromberg 1307: 1305: 1303: 1301: 1299: 1297: 1295: 1293: 1291: 1289: 530:unnamed lobe in Quebec – New England 7: 101:caused a much lower global sea level 1811:Ice Age National Scientific Reserve 1090:Historical names of interglacials. 699:Maxima of the Wisconsin ice sheets 1387:Elephant Tree: Bursera microphylla 78:and the current interglacial, the 54:, which nucleated in the northern 25: 1799:Horicon Marsh State Wildlife Area 2089: 2088: 1744:Origin of the Oak Ridges Moraine 1212:, Iowa, Kendall/Hunt Publishing 875: 861: 27:North American glacial ice sheet 2120:Glaciology of the United States 687:Stages of the Wisconsin episode 251:Culmination of Early Wisconsin 1807:, Idaho, Oregon and Washington 932:Retreat of glaciers since 1850 243:Culmination of Late Wisconsin 1: 2051:Huelmo–Mascardi Cold Reversal 1398:External links and references 1472:Glacial history of Minnesota 903:Glacial history of Minnesota 763: 749: 738: 723: 702: 417: 199:glacial lake outburst floods 1835:Kettle Moraine State Forest 1738:Lion's Head Provincial Park 593:and reaching into northern 300: 298:Beginning of Pre-Illinoian 292: 280: 272: 261: 253: 245: 238:Years before Present (YBP) 60:Canadian Arctic Archipelago 2191: 1981:Penultimate Glacial Period 1708:Big Rock (glacial erratic) 952:Pleistocene historic names 800:Settlement of the Americas 616: 574: 568: 364: 311: 48:most recent glacial period 2135:Pleistocene United States 2084: 2046:Late Glacial Interstadial 1825:, Minnesota and Wisconsin 1702:Arrowhead Provincial Park 1477:List of prehistoric lakes 733:(Great reduction of ice) 732: 698: 693: 619:List of prehistoric lakes 481: 464: 421: 413: 405: 330: 325: 229: 224: 56:North American Cordillera 44:Wisconsin glacial episode 18:Wisconsin Glacial Episode 2001:Holocene glacial retreat 1793:Glacial Lakes State Park 1732:Foothills Erratics Train 1404:britannica.com reference 1385:C. Michael Hogan, 2009. 587:Northern Rocky Mountains 219:ice mass in the north. 2041:Bølling–Allerød warming 1781:Devil's Lake State Park 1750:Ovayok Territorial Park 1439:Continental glaciations 1371:Harm J. De Blij. 2005. 823:researchers found that 774:Role in human migration 713:Position of ice border 278:Beginning of Illinoian 259:Beginning of Wisconsin 1883:Yosemite National Park 1787:Glacial Lake Wisconsin 1726:Eskers Provincial Park 1714:Cypress Hills (Canada) 1512:Timeline of glaciation 938:Timeline of glaciation 614: 308:Continental ice sheets 290:, i.e., old Nebraskan 129:, as well as parts of 102: 35: 2026:Quaternary glaciation 1961:Quaternary glaciation 1859:Mill Bluff State Park 1823:Interstate State Park 1637:Giant current ripples 1452:Cordilleran ice sheet 908:Glacial Lake Iroquois 826:Juniperus osteosperma 612: 571:Cordilleran Ice Sheet 565:Cordilleran Ice Sheet 393:Long Island, New York 387:and reached south to 349:Newfoundland Ice Cap 96: 52:Cordilleran Ice Sheet 33: 2165:Quaternary Wisconsin 2155:Quaternary Minnesota 2115:Glaciology of Canada 2036:Wisconsin glaciation 1991:Last Glacial Maximum 1507:Post-glacial rebound 1462:Last Glacial Maximum 1457:Laurentide ice sheet 883:North America portal 838:Monardella arizonica 710:Proximate years ago 408:Laurentide Ice Sheet 346:Nova Scotia Ice Cap 342:Laurentide Ice Sheet 314:Laurentide Ice Sheet 163:grooves left in rock 86:, also known as the 84:last glacial maximum 68:Laurentide Ice Sheet 40:Wisconsin glaciation 2175:Last Glacial Period 2150:Quaternary Michigan 2145:Quaternary Colorado 2130:Pleistocene geology 2021:Pre-Illinoian Stage 1986:Last Glacial Period 1775:Coteau des Prairies 1686:Greenland ice sheet 1091: 959: 926:Last Glacial Period 581:Last glacial period 533:Connecticut Valley 338:Keewatin ice sheet 189:) and move between 99:Last Glacial Period 72:Pinedale glaciation 64:Greenland ice sheet 2170:Quaternary Wyoming 2160:Quaternary Montana 2066:4.2 kiloyear event 2061:8.2 kiloyear event 1996:Mousterian Pluvial 1728:, British Columbia 1089: 957: 898:Geology of Ontario 849:Waterman Mountains 615: 549:Keewatin Ice Sheet 471:Harvard-Princeton 361:Labrador Ice Sheet 187:Bering Land Bridge 103: 90:in North America. 66:; and the massive 42:, also called the 36: 2140:Quaternary Canada 2102: 2101: 2071:Piora Oscillation 2031:Sangamonian Stage 1892: 1891: 1674: 1673: 1670: 1669: 1375:, 308 pages, p.69 1192: 1191: 1087: 1086: 844:Celtis reticulata 771: 770: 546: 545: 452:Wisconsin Valley 358: 357: 353:Greenland Ice Cap 305: 304: 169:and southeastern 76:Sangamonian Stage 16:(Redirected from 2182: 2092: 2091: 1692: 1617: 1601:Terminal moraine 1525: 1433: 1426: 1419: 1410: 1391: 1382: 1376: 1369: 1363: 1359: 1353: 1350: 1344: 1341: 1330: 1327: 1284: 1281: 1275: 1265: 1259: 1255: 1232: 1226: 1220: 1206: 1092: 960: 885: 880: 879: 878: 871: 866: 865: 832:Pinus monophylla 691: 669:terminal moraine 629:proglacial lakes 591:British Columbia 403: 323: 222: 203:Kankakee Torrent 117:covered most of 21: 2190: 2189: 2185: 2184: 2183: 2181: 2180: 2179: 2105: 2104: 2103: 2098: 2080: 1966:Illinoian Stage 1949: 1940:Lambert Glacier 1923: 1909:Killary Harbour 1888: 1841:Lake Bonneville 1761: 1755: 1690: 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1470: 1468: 1465: 1463: 1460: 1458: 1455: 1453: 1450: 1449: 1447: 1443: 1434: 1429: 1427: 1422: 1420: 1415: 1414: 1411: 1405: 1402: 1401: 1397: 1390: 1388: 1381: 1378: 1374: 1368: 1365: 1358: 1355: 1349: 1346: 1340: 1338: 1336: 1332: 1326: 1324: 1322: 1320: 1318: 1316: 1314: 1312: 1310: 1308: 1306: 1304: 1302: 1300: 1298: 1296: 1294: 1292: 1290: 1286: 1280: 1277: 1274: 1273:0-8137-2337-X 1270: 1264: 1261: 1254: 1252: 1250: 1248: 1246: 1244: 1242: 1240: 1238: 1234: 1231: 1225: 1222: 1219: 1218:0-7872-5353-7 1215: 1211: 1205: 1202: 1195: 1188: 1185: 1183: 1180: 1178: 1175: 1173: 1170: 1169: 1166: 1163: 1161: 1158: 1156: 1153: 1151: 1150:British Isles 1148: 1147: 1144: 1141: 1138: 1135: 1133: 1130: 1129: 1126: 1123: 1121: 1118: 1116: 1113: 1111: 1108: 1107: 1103: 1100: 1097: 1094: 1093: 1083: 1080: 1078: 1075: 1073: 1070: 1068: 1065: 1063: 1060: 1059: 1056: 1053: 1051: 1048: 1046: 1043: 1041: 1038: 1036: 1035:British Isles 1033: 1032: 1029: 1026: 1024: 1021: 1019: 1016: 1014: 1011: 1009: 1006: 1005: 1002: 999: 997: 994: 992: 989: 987: 984: 982: 979: 978: 974: 971: 968: 965: 962: 961: 951: 945: 944:Younger Dryas 942: 939: 936: 933: 930: 927: 924: 921: 918: 915: 914:Ice Age Trail 912: 909: 906: 904: 901: 899: 896: 893: 890: 889: 884: 873: 870: 864: 859: 854: 852: 850: 846: 845: 840: 839: 834: 833: 828: 827: 822: 818: 809: 807: 805: 801: 797: 793: 789: 788:Bering Strait 785: 781: 773: 766: 761:No known ice 760: 757: 756: 752: 746: 745: 741: 735: 731: 726: 720: 717: 716: 712: 709: 706: 703: 697: 692: 686: 684: 682: 678: 674: 673:outwash plain 671:is called an 670: 666: 662: 658: 654: 650: 646: 642: 634: 632: 630: 626: 620: 611: 604: 602: 600: 596: 592: 588: 582: 578: 572: 564: 562: 560: 556: 548: 542:Georges Bank 541: 538: 536:Buzzards Bay 535: 532: 529: 528: 525: 523: 521:Hudson River 520: 517: 515:Lake Ontario 514: 513: 509: 508: 505: 502: 499: 496: 493: 492: 488: 487: 484: 480: 476: 473: 470: 467: 463: 459: 458: 454: 451: 448: 445: 442: 441: 438: 435: 432: 429: 426: 425: 418: 412: 409: 404: 398: 396: 394: 390: 386: 382: 378: 374: 368: 360: 354: 351: 348: 345: 343: 340: 337: 336: 333: 329: 324: 318: 315: 307: 297: 296: 289: 288:Pre-Illinoian 285: 284: 277: 276: 270: 266: 265: 258: 257: 250: 249: 242: 241: 237: 234: 233: 228: 223: 220: 217: 208: 206: 204: 200: 196: 192: 191:North America 188: 184: 180: 176: 175:Cypress Hills 172: 168: 164: 160: 156: 155:New York City 152: 148: 144: 140: 136: 132: 128: 124: 123:Upper Midwest 120: 116: 112: 108: 100: 95: 91: 89: 85: 81: 77: 73: 69: 65: 61: 57: 53: 49: 45: 41: 32: 19: 2035: 2006:Oldest Dryas 1976:Interstadial 1971:Interglacial 1954:Time periods 1885:, California 1879:, Washington 1620:Glacifluvial 1569:Depositional 1492:Lake Chicago 1487:Lake Agassiz 1386: 1380: 1372: 1367: 1357: 1348: 1279: 1263: 1224: 1209: 1204: 1172:Midwest U.S. 1171: 1149: 1139:Holsteinian 1132:North Europe 1131: 1109: 1062:Midwest U.S. 1061: 1034: 1008:North Europe 1007: 980: 842: 836: 830: 824: 813: 777: 707:Eastern Ice 704:Western Ice 638: 622: 584: 552: 422:Minor Lobes 419:Major Lobes 370: 212: 201:such as the 181:, to occupy 167:Saskatchewan 159:Central Park 104: 87: 43: 39: 37: 2016:Pleistocene 2011:Older Dryas 1873:, Wisconsin 1865:Oneida Lake 1861:, Wisconsin 1837:, Wisconsin 1819:, Wisconsin 1813:, Wisconsin 1801:, Wisconsin 1795:, Minnesota 1789:, Wisconsin 1783:, Wisconsin 1771:, Wisconsin 1657:Outwash fan 1652:Kettle hole 1545:Ribbon lake 1502:Teays River 1187:Sangamonian 1182:Yarmouthian 1120:Mindel-Riss 1115:Günz-Mindel 1082:Wisconsinan 1028:Weichselian 817:pollen core 786:across the 780:land bridge 497:East White 494:Lake Huron 430:Grantsburg 427:Des Moines 385:New England 377:Great Lakes 367:Great Lakes 149:, northern 127:New England 111:Great Lakes 2109:Categories 1935:Antarctica 1928:Antarctica 1914:Monte Rosa 1867:, New York 1647:Kame delta 1606:Till plain 1497:Lake Tight 1196:References 1165:Ipswichian 1050:Wolstonian 1040:Beestonian 975:Glacial 4 972:Glacial 3 969:Glacial 2 966:Glacial 1 806:and Asia. 681:till plain 617:See also: 597:State and 595:Washington 575:See also: 510:Lake Erie 460:Green Bay 433:St. Louis 406:Table III 381:Ohio River 365:See also: 312:See also: 301:1,200,000 151:New Jersey 139:Washington 107:Ohio River 46:, was the 1855:, Montana 1752:, Nunavut 1746:, Ontario 1740:, Ontario 1734:, Alberta 1722:, Ontario 1710:, Alberta 1704:, Ontario 1528:Erosional 1521:Landforms 1155:Cromerian 1125:Riss-Würm 1077:Illinoian 1067:Nebraskan 1055:Devensian 1018:Elsterian 1013:Eburonian 782:known as 747:Tazewell 694:Table IV 653:landforms 539:Cape Cod 455:Langlade 449:Chippewa 399:Ice lobes 326:Table II 269:Illinoian 216:Illinoian 147:Lake Erie 115:ice sheet 2125:Ice ages 2094:Category 1919:Svalbard 1849:, Nevada 1627:Diluvium 1177:Aftonian 1136:Waalian 920:Ice core 855:See also 784:Beringia 721:Valders 718:Mankato 661:moraines 577:glaciers 555:Keewatin 489:Saginaw 477:Decatur 468:Delavan 389:Cape Cod 373:Manitoba 332:Ice Caps 319:Ice caps 293:550,000 281:350,000 273:300,000 262:150,000 254:100,000 225:Table I 183:Beringia 80:Holocene 1897:Eurasia 1586:Moraine 1576:Drumlin 1445:General 1160:Hoxnian 1095:Region 1045:Anglian 1023:Saalian 963:Region 792:Siberia 764:65,500 750:40,000 739:27,500 724:25,000 625:moraine 599:Montana 503:Scioto 474:Peoria 446:Wadena 436:Rainey 379:to the 246:50,000 195:Siberia 171:Alberta 153:and in 135:Montana 1843:, Utah 1831:, Ohio 1762:States 1760:United 1695:Canada 1662:Sandur 1271:  1216:  1143:Eemian 1072:Kansan 991:Mindel 851:site. 804:Europe 758:Iowan 665:eskers 649:gravel 647:, and 500:Miami 179:humans 161:, the 137:, and 125:, and 121:, the 119:Canada 62:; the 1632:Esker 1535:Fjord 798:(see 736:Cary 657:kames 209:Times 185:(the 141:. On 131:Idaho 1642:Kame 1362:1918 1269:ISBN 1258:1913 1214:ISBN 1110:Alps 1001:Würm 996:Riss 986:Günz 981:Alps 829:and 796:Asia 645:sand 641:clay 579:and 391:and 235:Age 193:and 97:The 38:The 794:in 679:or 157:'s 145:in 2111:: 1334:^ 1288:^ 1236:^ 643:, 561:. 395:. 133:, 1432:e 1425:t 1418:v 20:)

Index

Wisconsin Glacial Episode

most recent glacial period
Cordilleran Ice Sheet
North American Cordillera
Canadian Arctic Archipelago
Greenland ice sheet
Laurentide Ice Sheet
Pinedale glaciation
Sangamonian Stage
Holocene
last glacial maximum

Last Glacial Period
Ohio River
Great Lakes
ice sheet
Canada
Upper Midwest
New England
Idaho
Montana
Washington
Kelleys Island
Lake Erie
New Jersey
New York City
Central Park
grooves left in rock
Saskatchewan

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