Ice-sheet here less Probable uplift 3,0 Second elevation and extensive than in the feet, shown by general glaciation of first Glacial epoch, and submerged valleys near northwestern Europe; not generally bordered Cape Mendocino. Second the ice-sheets of Great as then by lakes in ice-sheet on British Britain probably more valleys which now drain Columbia and Vancouver extensive than in first southward. Island; local Glacial epoch. glaciation of Rocky Oscillations of Terminal moraines at Mountains, Cascade and ice-front; British extreme limit of the Sierra range, Nevada, Lower and Upper ice-advance, and at ten south to latitude 37°. the Chalky, Purple, and or more stages of halt or First great rise of bowlder-clays, Hessle readvance in its retreat. Lakes Bonneville bowlder-clays. Terminal and Lahontan. moraines in Germany. Depression nearly to Continental depression. Recession, or probably present level southward; Arid climate. Long- complete departure, of more northward, but continued denudation of the ice-sheets. followed there, by the mountains: differential uplift of resulting very thick Land connection between 800 or 1,000 feet. subaërial deposits of Europe and Africa, Great erosion of loess the "adobe." permitting southern and other modified animals to extend far drift, and of "Orange Intermittent volcanic northward. Sand." Valleys of this action in various parts epoch, partly filled of this region, Erosion of the Somme with later till, are throughout the Valley below its oldest marked by chains of Quaternary era to very implement-bearing lakes in southern recent times, and gravels. Minnesota. liable to break forth again.