Boulder, CO, USA The December Geosphere, The Geological Society of America's e-journal, is now online. Topics include detailed data integration from multiple fields, including tectonics, oceanography, sedimentology, and paleontology, to study the southwestern U.S. climate 17 million years ago to 6 million years ago; sedimentation in a piggyback basin; Angel Lake orthogneiss in the East Humboldt Range, Nevada; and a study of the South Balkan extensional system within southern Bulgaria, Macedonia, eastern Albania, northern Greece, and northwestern Turkey.
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Interplay of oceanographic and paleoclimate events with tectonism during middle to late Miocene sedimentation across the southwestern USA
Charles E. Chapin, New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, USA.
This paper uses sedimentation and erosion history as proxy for changes in the climate of the southwestern USA during the middle and late Miocene (ca. 17 Ma). The continental sedimentary record was compiled along a 2000-km transect from coastal California to the western Great Plains and correlated with the coeval marine Monterey Formation. Integration of data from the fields of plate tectonics, oceanography, sedimentology, paleoclimatology, and paleontology were used to interpret the causes and effects of major changes in the continental a
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Geological Society of America