Abstract
Some of the outstanding geologic facts which have to be taken into account in a consideration of isostasy are enumerated. Mountain building, peneplanation, geosyn-clines, etc., are considered from the point of view of both geologic deductions and the isostatic theory. It is concluded that no single type of compensation or uniform depth of compensation meets the facts. The real test of the isostatic theory seems to lie in the limited regions of high relief. An attempt is made to show how geologic processes may operate to produce folded mountain ranges exhibiting the observed geologic phenomena and at the same time make it possible to satisfy the requirements of the geodetic determinations. Isostatic forces are in the whole equation of mountain-building forces, and play their appropriate part, but that part is secondary and subordinate.
Published Version
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