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The AAPG/Datapages Combined Publications Database
Pacific Section of AAPG
Abstract
Late-Miocene Counterclockwise Rotation of the South Half of Santa Cruz Island
Abstract
The orientations of Mesozoic foliation and Cenozoic paleocurrent direction lineations on the south half of Santa Cruz Island are anomalous compared to similar data elsewhere from the southern California borderland. These data from Santa Cruz Island would better fit the regional geologic setting if they were palinspastically adjusted to account for 32° of counterclockwise rotation.
The inferred rotation may be a manifestation of right slip along the East Santa Cruz Basin fault in the area where the trace of the fault is nearly east-west. This hypothesis is potentially testable by making paleomagnetic-pole measurements of the rocks south of the fault that presumed to be rotated and those north of it that are not.
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