Skip to Main Content
Book Chapter

REGIONAL INVESTIGATIONS OF CRUST AND UPPER MANTLE IN THE CONTINENTAL U.S.: RELATIONS TO PHYSIOGRAPHIC AND GEOLOGIC FEATURES

Published:
January 01, 1989

The continental margin of western North America largely coincides with recently active plate boundaries. The plate interactions along the margin vary in tectonic style from oblique convergence through transform faulting and translation to subduction. The margin also includes at least two major migrating triple plate junctions. Plate-tectonic and geologic reconstructions suggest that a similar range of tectonic processes has been active along this margin for many tens of millions of years. The crustal thickness of the continental margin as far as 200 km inland from the continental slope is almost everywhere considerably less than “normal” continental, and commonly about 20 km. It seems evident that these tectonic processes have either thinned preexisting continental crust or preserved and uplifted former oceanic crust. They have not produced the 30- to 40-km-thick crust normally associated with continental material.

You do not currently have access to this article.

Figures & Tables

Contents

GSA Memoirs

Geophysical Framework of the Continental United States

L. C. Pakiser
L. C. Pakiser
Search for other works by this author on:
Walter D. Mooney
Walter D. Mooney
Search for other works by this author on:
Geological Society of America
Volume
172
ISBN print:
9780813711720
Publication date:
January 01, 1989

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal