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Science 31 October 1969:
Vol. 166. no. 3905, pp. 607 - 609
DOI: 10.1126/science.166.3905.607
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Articles

Alaskan Upper Miocene Marine Glacial Deposits and the Turborotalia pachyderma Datum Plane

Orville L. Bandy 1, E. Ann Butler 2, and Ramil C. Wright 3

1 Department of Geological Sciences, University of Southern California, Los Angeles 90007
2 Atlantic Richfield Compapny, Box 7190, Tulsa, Oklahoma 74105
3 Department of Geology, Beloit College, Beloit. Wisconsin

ln southeastern Alaska the first marine evidence of widespread glaciation occurs in Miocene sections near the base of the Yakataga Formation. An associated temperature decrease of about 10°C is indicated by the influx of an upper Miocene cold-water planktontic foraminifer, Turborotalia pachyderma, an event that occurred about 13 million years ago.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Application of Carbon Isotope Stratigraphy to Late Miocene Shallow Marine Sediments, New Zealand.
T. S. Loutit, T. S. LOUTIT, and J. P. KENNETT (1979)
Science 204, 1196-1199
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Explosive Cenozoic Volcanism and Climatic Implications.
D. Ninkovich, D. Ninkovich, and W. L. Donn (1976)
Science 194, 899-906
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Science. ISSN 0036-8075 (print), 1095-9203 (online)