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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 62 (1978)

Issue: 7. (July)

First Page: 1193

Last Page: 1197

Title: Early Tertiary Rifting in Western Oregon-Washington: GEOLOGIC NOTES

Author(s): Robert G. McWilliams (2)

Abstract:

Seafloor spreading along the Kula-Farallon plate boundaries may be the explanation for geographic separation and different ages of the submarine basalts in western Oregon-Washington. Eocene strata of the Columbia arc are interpreted to be Tertiary seafloor that was wedged between the Juan de Fuca and North American plates when, in early Refugian time, subduction changed from its Mesozoic-early Tertiary location to the present location.

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