. Elementary physical geography;. 354 PHYSICAL GEOGRAPHY tains; and the Pacific Coast Region. Make a list of these,grouping each subdivision under its principal division. The New England Plateau. — This region embracesthe northern Appalachian folds, together with areas thatbelong to the Laurentian highlands. During the Glacialepoch the Appalachian folds in places were almost ob-literated. The Green, White, Adirondack, and Catskill. THE WATER-POWER HAS BEEN LARGELY SUPPLEMENTED BY STEAM-POWER Mountains are the principal remnants. Here and there areisolated monadnocks ; most of these are bosses
. Elementary physical geography;. 354 PHYSICAL GEOGRAPHY tains; and the Pacific Coast Region. Make a list of these,grouping each subdivision under its principal division. The New England Plateau. — This region embracesthe northern Appalachian folds, together with areas thatbelong to the Laurentian highlands. During the Glacialepoch the Appalachian folds in places were almost ob-literated. The Green, White, Adirondack, and Catskill. THE WATER-POWER HAS BEEN LARGELY SUPPLEMENTED BY STEAM-POWER Mountains are the principal remnants. Here and there areisolated monadnocks ; most of these are bosses of volcanicrock which were able to withstand the erosion and corrasionthat resulted during the ice age. Granitic rocks prevail, andtheir rounded surfaces are generally smooth and polished. As a result of the Glacial epoch the surface of the NewEngland Plateau is very rugged, the only level regionsbeing the river flood plains and the old lake basins whose INDUSTRIAL REGIONS OF UNITED STATES 355 waters have disappeared. Many lakes still remain, how-ever, and these, a few coast lagoons excepted, are glaciallakes, or tarns. Name six of the largest. The slope isabrupt and the rivers, therefore, flow iri reaches; that is,stretches of slack water alternate with rapids and coast is a type of the submerged or drowned
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