Identifier: forestphysiograp01bowm (find matches)
Title: Forest physiography; physiography of the United States and principles of soils in relation to forestry
Year: 1911 (1910s)
Authors: Bowman, Isaiah, 1878-1950
Subjects: Physical geography Forests and forestry Soils
Publisher: New York, J. Wiley & sons (etc., etc.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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. The chief effects of glaciation are, however, to be found upon the west-ern slopes of the Absaroka Range, where a heavy ice cap developed, —one of the largest local glacial centers developed in the Rocky Mountainssouth of the great continental ice sheet. This local ice cap was confluentwith that in the Yellowstone National Park, where a broad area of elevatedcountry supplied favorable conditions for extensive glacial accumulationswhich fed marginal glaciers deploying down the valleys.- In the deepbasins of some of the higher valleys facing northeast, a few snow-fiieldsare still to be found and even small glaciers. The glaciers lie in broad, 1 J. B. Leiberg, Forest Conditions in the Absaroka Division of the Yellowstone ForestReserve, Montana, and the Livingston and Big Timber.Quadrangles, Prof. Paper U. S. Geol.Surv. No. 29, 1904, pp. 10-21. 2 W. H. Weed, The Glaciation of the Yellowstone Valley North of the Park, Bull. U. S.Geol. Surv. No. 104, 1893, p. 13. 336 FOREST PHYSIOGRAPHY
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> ^ m P^ _•o 1o oS in ROCKY MOUNTAINS. II 337 rock-bound amphitheaters in great measure protected from the directrays of the sun between high walls, and in localities where the prevailingsouthwest winds deliver vast quantities of snow during the winterseason.^ The greater part of the Absaroka Range in the Yellowstone NationalForest is clothed with coniferous forests broken by open glades. Theisolated peaks and irregular crests of the main ridges are above timberline, and bear only scattered and stunted growths of weather-beaten trees.The western side of the range has a more continuous forest cover thanthe eastern. Lodgepole pine is the prevailing tree, limber pine is foundat higher altitudes, and balsam and spruce are scattered widely thoughthey nowhere attain great height or size. The most stately and vigoroustree of the Absarokas is the Douglas spruce, but it has a scatteredgrowth. None of the timber of the Absaroka region is of superiorquality, though sufficient for local requ

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