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Upper crustal structure of the Mount Hood, Oregon, region as revealed by time term analysis.

Journal of Geophysical Research

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Abstract

Seismic refraction data with a dense areal distribution were collected to study the seismic structure of Mount Hood and the surrounding region. This area is typical of Cascade volcanoes and is geologically quite complex. The prime goals of this project were to search for velocity variations in the upper crustal rocks and to determine if the velocity of these rocks is anisotropic. A new system, including 100 remote recording units, was developed to facilitate the collection of data in this type of survey. The data collected in this study reveal a large variation in velocity and thickness of the uppermost crustal rocks that is probably typical of the High Cascade province. A regional structural pattern surrounding Mount Hood, where there is a marked thinning of low-velocity near-surface rocks, suggests that the present edifice of Mount Hood lies on top of a much larger structure, possibly the roof of a large batholith that was emplaced prior to the eruption of the volcanic rocks that form the modern mountain.-Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Upper crustal structure of the Mount Hood, Oregon, region as revealed by time term analysis.
Series title:
Journal of Geophysical Research
Volume
87
Issue:
B1
Year Published:
1982
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Geophysical Research
First page:
339
Last page:
355
Number of Pages:
17