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A relation among geology, tectonics, and velocity structure, western to central Nevada Basin and Range

Geological Society of America Bulletin

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Abstract

In the northwestern to central Nevada Basin and Range, there are correlations between velocity and specific geologic structures of the crust. Mapped range-bounding faults at the surface can be traced to appreciable (10km) depths based on velocity variations and are consistent with subsurface projections of the faults based on seismic reflection images. Correlations between velocity and the surface geology show that in the upper crust the pre-Cenozoic rocks are underlain by high-velocity rocks, whereas the Tertiary ranges are underlain by lower-velocity rocks to depths as great as 10 km. The regional seismicity pattern is consistent with this interpretation, as earthquakes are largely confined within or near the base of the low-velocity rocks. These low-velocity, highly fractured rocks are laterally distributed in discrete zones, suggesting that extension is not uniformly distributed but occurs in discrete, highly extended zones. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A relation among geology, tectonics, and velocity structure, western to central Nevada Basin and Range
Series title:
Geological Society of America Bulletin
Volume
104
Issue:
9
Year Published:
1992
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geological Society of America Bulletin
First page:
1178
Last page:
1192
Number of Pages:
15