Paleostress and Mechanisms of Slip on the San Gabriel Fault,San Andreas Fault System, California
{'Code': '06030103', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Thomas O. Wright', 'PO_EMAI': None, 'PO_PHON': None}
Data on principal stress orientation from shallow wells                    indicate a low magnitude shear stress on the San Andreas Fault,                 California.  These data are consistent with heat-flow measure-                  ments and predictions, but are inconsistent with estimated                      strength of rocks.  This project will attempt to test the hypo-                 thesis that the shallow well data are representative of the                     state of stress at mid-crustal depths by determining the orien-                 tation of the principal stresses that existed during activity on                the San Gabriel fault, now deeply exhumed.  Paleostress orien-                  tations and mechanisms of slip will be determined by petrofabric                analysis of structures in the fault zone.  Results will be                      compared to laboratory data and applied to the problem of the                   apparently weak fault strength.
{'FirstName': 'Frederick', 'LastName': 'Chester', 'PI_MID_INIT': 'M', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Frederick M Chester', 'EmailAddress': 'chesterf@tamu.edu', 'NSF_ID': '000444615', 'StartDate': '02/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Columbia University Lamont Doherty Earth Observatory', 'CityName': 'Palisades', 'ZipCode': '10964', 'PhoneNumber': '9143592900', 'StreetAddress': 'Rt 9W', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'New York', 'StateCode': 'NY', 'CONGRESSDISTRICT': '17', 'CONGRESS_DISTRICT_ORG': 'NY17', 'ORG_UEI_NUM': None, 'ORG_LGL_BUS_NAME': None, 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1572', 'Text': 'Tectonics'}
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