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Jurassic normal and strike-slip faults at Crater Island, northwestern Utah

Geological Society of America Bulletin

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Abstract

At Crater Island, northern Silver Island Mountains, northwestern Utah, an unbroken Tertiary fault block within the Basin and Range province exhibits Jurassic or older structures that are virtually unmodified by subsequent tectonism. Widespread high-angle faults, mainly striking north and north-east, offset the moderately west-dipping strata down to the west, thereby extending the strata parallel to bedding by 10% to 20%. The normal faults merge with a north northwest dextral strike-slip fault system. The two fault systems are kinematically compatible, suggesting that they may have been contemporaneous. The data indicate that minor thrusting, probably during the Jurassic, was followed by extensional faulting within a strike-slip fault system, probably close in time to intrusion. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Jurassic normal and strike-slip faults at Crater Island, northwestern Utah
Series title:
Geological Society of America Bulletin
Volume
103
Issue:
9
Year Published:
1991
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geological Society of America Bulletin
First page:
1239
Last page:
1251
Number of Pages:
13