Man and the Glacial Period

accumulation Alleghany Alps America animals basin boulder-clay boulders cave channel clay cliffs coast continuous County Creek depth discovery distance drainage drift east elevation England erosion Europe evidence extending facts farther fiords flint flow formed Fort Snelling Geological Society geologists glacial deposits Glacial epoch glacial ice glacial motion Glacial period glaciated area glaciated region gorge granite gravel Greenland height hills hundred feet Ice age ice-front ice-sheet implements Irish Sea Island kettle-holes Lake Agassiz Lake Michigan Lake Ontario land latitude lava loess lower marine mass melting miles Mississippi motion névé northern northward numerous occur Ohio Ohio River outlet palæolithic pebbles Pliocene portion preglacial present Professor Rhône Glacier ridges River rock sand shells shore side southern southward species square miles strata streams subsidence surface terminal moraine terraces Tertiary Thenay theory thick thousand feet tion transported Trenton tributary upper valley vicinity western