Late Mesozoic(?)-Mid Cenozoic Hinterland Extension:  Black  Pine Mountains, Idaho and Raft River Mountains, Utah
{'Code': '06030103', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Thomas O. Wright'}
Horizontal extension in the Hinterland of a thin-skinned                   thrust belt has been proposed as a natural consequence of crustal               shortening and thickening and resulting topographic uplift.  Most               examples are known from modern orogens and ancient belts have                   yielded little evidence. This study will explore a suggestion of                extension in the enigmatic, younger-over-older, top-to-the-west                 faults in southern Idaho that appear to be contemporaneous with                 Late-Cretaceous Laramide compression.  The fault motion and timing              will be addressed by 39Ar/40Ar dating and by reconstructing the                 thermal regime by illite crystallinity and conodont CAI.  Results               are expected to define the timing and kinematics of extensional                 tectonics in this region, and will bear on the relations among                  crustal shortening, thickening, topographic uplift, erosion and                 extension in the hinterland of thrust belts.
{'FirstName': 'Richard', 'LastName': 'Allmendinger', 'EmailAddress': 'rwa1@cornell.edu', 'StartDate': '07/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Cornell University', 'CityName': 'Ithaca', 'ZipCode': '148502820', 'PhoneNumber': '6072555014', 'StreetAddress': '373 Pine Tree Road', 'CountryName': 'United States', 'StateName': 'New York', 'StateCode': 'NY'}
{'Code': '1572', 'Text': 'Tectonics'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1987&All=true', 'xml': '8720952.xml'}