Forest physiography; physiography of the United States and principles of soils in relation to forestry . p^ o CASCADE AND SIERRA NEVADA MOUNTAINS 153. 154 FOREST PHYSIOGRAPHY The uniformity of summit level has been found to extend over thegreater part of the Cascades, but it is clearly visible only from selectedviewpoints and is generally expressed in the ideal plane of the ridge crestsand the hilltops rather than in the few undissected remnants of theformer plateau now remaining. It occurs at elevations varying from4000 to 8000 feet; the maximum of 8000 feet is attained north of the47th paral
Forest physiography; physiography of the United States and principles of soils in relation to forestry . p^ o CASCADE AND SIERRA NEVADA MOUNTAINS 153. 154 FOREST PHYSIOGRAPHY The uniformity of summit level has been found to extend over thegreater part of the Cascades, but it is clearly visible only from selectedviewpoints and is generally expressed in the ideal plane of the ridge crestsand the hilltops rather than in the few undissected remnants of theformer plateau now remaining. It occurs at elevations varying from4000 to 8000 feet; the maximum of 8000 feet is attained north of the47th parallel and continues to the 49th parallel. In the vicinity ofMount Rainier the plateau remnants, at about 7500 feet, form the plat-form on which the cone of Mount Rainier stands. Toward the souththe altitude of the plateau decreases and becomes about 4000 feet insouthern Oregon where the width of the province -at the plateau levelis from 60 to 75 miles. Between latitude 44° and 45° N. in the MountWashington-Mount Jefferson country the accordance of summit levelsamong the hill and ridge crests is quite remarkable, the broad basesof the snow-cappe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
