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Book Chapter

The Middle America Trench off southern Mexico

By
Joel S. Watkins
Joel S. Watkins
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Published:
January 01, 1989

Abstract

The Middle America Trench extends for roughly 3,000 km from the Tres Marias Islands off Mexico near the mouth of the Gulf of California southward to the Osa Peninsula in southwestern Costa Rica (Fig. 1 and Plate 1C). The Tamayo Fracture Zone, a transverse fracture zone associated with the East Pacific Rise, bounds the trench to the north, and the Panama Fracture Zone bounds it to the south. The Tehuantepec Ridge separates the trench into northern and southern segments, each having different and contrasting morphological and structural styles.Convergent plate boundaries, such as the Middle America Trench, constitute a complicated family of structural zones characterized by high relief, intense deformation, large earthquakes, and often by extensive volcanism. The study of modern convergent plate boundaries contributes not only to an understanding of contemporary and recent processes, but of ancient plate boundaries and mountain belts as well.

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Contents

DNAG, Geology of North America

The Eastern Pacific Ocean and Hawaii

E. L. Winterer
E. L. Winterer
Scripps Institution of Oceanography La Jolla, California 92093
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Donald M. Hussong
Donald M. Hussong
University of Hawaii Department of Geology and Geophysics Honolulu, Hawaii 96822
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Robert W. Decker
Robert W. Decker
4087 Silver Bar Road Mariposa, California 95338
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Geological Society of America
Volume
N
ISBN electronic:
9780813754659
Publication date:
January 01, 1989

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