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  • The Cretaceous In The Caborca Santa Ana Region, Northern Sonora, Mexico.

    Etd thumbnail: The Cretaceous In The Caborca Santa Ana Region, Northern Sonora, Mexico.
    Type:
    Etd
    Description/Abstract:
    Stratigraphic, sedimentologic and petrographic studies of the Lower and Upper Cretaceous in northwest Sonora show that deposition of the Bisbee Group occurred at the northern margin of a back-arc marine basin, and of the El Chanate Group and El Charro volcanic complex in a closed continental foreland basin. This study also finds that the Proterozoic-Paleozoic formations in northwest Sonora (Caborca terrane) were not part of the Cretaceous landscape, thus raising doubts about the existence of the Mojave-Sonora megashear.
    Creator/Author:
    Jacques Ayala, Cesar.
    Submitter:
    UC Libraries
    Date Uploaded:
    03/26/2018
    Date Modified:
    03/26/2018
    Date Created:
    1993
    License:
    All rights reserved