Isotopic Studies of Late Paleozoic Cyclical Sedimentary     Deposits
{'Code': '06030101', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'John A. Maccini', 'PO_EMAI': None, 'PO_PHON': None}
The goal of this project is to establish a high resolution                 isotope stratigraphy for the late Carboniferous using marine                    deposits from the south-central portion of the North American                   continent.  Earlier work (Grossman et al., 1985; Adlis et al.,                  1987) on Virgilian (late Pennsylvanian) cyclic deposits in north-               central Texas has shown that original isotopic composition is                   preserved in many calcitic shells of marine organisms.  The                     availability of such material provides a unique opportunity to                  develop a near-continuous isotopic record for the latest                        Carboniferous and earliest Permian (a 15-20 million year time                   interval).  Such a record, with proper paleontologic and                        sedimentologic control, can be used 1) to document secular                      variation in the  18O of seawater, 2) top determine changes in                  paleotemperature and paleodepth of the sea floor at the time of                 deposition, and 3) using paleodepth data, to determine the                      magnitude of late Carboniferous eustatic changes in sea level.                       Distinguishing the  18O record paleotemperature trends from                changes in the  18O of seawater has always hampered isotopic                    studies.  Detailed paleontologic and lithologic data to                         distinguish isotopic trends caused by local salinity change, or                 temperature change associated with changes in paleodepth, from                  isotopic trends derived from changes in seawater  18O associated                with glaciation will be used.  As a further check on depth effects              we will determine a separate isotopic curve based on thick-shelled              brachiopods from the zero depth horizon.  This methodology will                 permit quantification of the eustatic sea level changes that                    produce Carboniferous cyclic deposits, but more importantly, will               produce an isotope stratigraphy for testing and extending the                   emerging cycle stratigraphy of the Carboniferous and Permian,                   eventually leading to a global isotopic event stratigraphy.
[{'FirstName': 'Thomas', 'LastName': 'Yancey', 'PI_MID_INIT': 'E', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Thomas E Yancey', 'EmailAddress': 'yancey@geo.tamu.edu', 'NSF_ID': '000119039', 'StartDate': '02/01/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Ethan', 'LastName': 'Grossman', 'PI_MID_INIT': 'L', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Ethan L Grossman', 'EmailAddress': 'e-grossman@tamu.edu', 'NSF_ID': '000177704', 'StartDate': '02/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}]
{'Name': 'Texas A&M Research Foundation', 'CityName': 'COLLEGE STATION', 'ZipCode': '778454375', 'PhoneNumber': '9798626777', 'StreetAddress': '400 HARVEY MITCHELL PKWY S STE 3', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Texas', 'StateCode': 'TX', 'CONGRESSDISTRICT': '10', 'CONGRESS_DISTRICT_ORG': 'TX10', 'ORG_UEI_NUM': 'EQH8NQ4AXFT7', 'ORG_LGL_BUS_NAME': 'TEXAS A & M RESEARCH FOUNDATION', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
[{'Code': '157100', 'Text': 'SCEC'}, {'Code': '912000', 'Text': 'CROSS-DIRECTORATE PROGRAMS'}]
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1987&All=true', 'xml': '8720886.xml'}