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Appalachian Tectonics

Appalachian Tectonics

Paperback

Series: Heritage

Environmental StudiesGeologyPhysics

ISBN10: 1442639229
ISBN13: 9781442639225
Publisher: University of Toronto Press
Published: Dec 15 1967
Pages: 112
Weight: 0.46
Height: 0.23 Width: 7.00 Depth: 10.00
Language: English

Mountain ranges are the most conspicuous elements of the

earth's architecture, and the manner in which the architectural units are

arranged or disarranged has become the study of a subdivision of geology known as

Tectonics. A hundred years ago James Hall attempted the first scientific synthesis

of the steps in the building of the eastern North American mountains, the

Appalachians. His initial hypothesis of 1857, expanded and broadened by J.D. Dana

during the decade which followed, laid the foundation for our modern geosynclinal

theory of mountain building. During the last century of modifications and

refinements were contributed concerning the roles played by crustal compression,

sub-crustal convection currents, batholiths, metamorphism, gravity sliding, and

isostasy. In recent years detailed mapping, supplemented by studies of turbidity

currents, paleomagentism, stable isotopes, and radio-activity have helped to unravel

the history of mountain building, but today there are as many questions unanswered

as there are those for which there are tentative solutions.

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Clark, Thomas

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Environmental Studies