Age determination of Paleogene sediments from the Prysz Bay, supplement to: Thierstein, Hans R; MacDougall, J Douglas; Martin, Ellen E; Larsen, Birger; Barron, John A; Baldauf, Jack G (1991): Age determinations of Paleogene Diamictites from Prydz Bay (Site 739), Antarctica, using sr isotopes of mollusks and biostratigraphy of microfossils (diatoms and coccoliths). In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 739-745

Hans R Thierstein, J Douglas MacDougall, Ellen E Martin, Birger Larsen, John A Barron & Jack G Baldauf
Age dating of Paleogene diamictites from ODP Site 739 in Prydz Bay with marine microfossils (diatoms and calcareous nannofossils) suggests the build-up of a major East Antarctic ice shield in latest Eocene to earliest Oligocene time, about 35-38 m.y. ago. Strontium isotopic analyses of small mollusk remains found within these diamictites, however, yield younger ages ranging from 29 to 23 Ma (i.e., latest early Oligocene to earliest Miocene). These age discrepancies could be caused by...
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