Filters: Tags: magnetostratigraphy (X)
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New paleomagnetic and stable isotopic results from the northeastern margin of the greater Green River Basin (South Pass, Wyoming) provide a refined geochronological context for the Wasatchian/Bridgerian Land Mammal Age boundary and suggest the existence of large amplitude Milankovich-scale carbon and oxygen isotopic oscillations in this area during the early Eocene. Analysis of 55 paleomagnetic sites through a 310 m section of Wasatch, Green River, and Bridger Formations indicates several reversals that can be correlated to the Geomagnetic Polarity Time Scale using radiometric age constraints. This correlation places the Wasatchian/Bridgerian boundary in Chron C23r at about 52 Ma, approximately two million years...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Palaeogeography, Palaeoclimatology, Palaeoecology,
biostratigraphy,
eocene,
green river basin,
magnetostratigraphy,
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