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An Upper Miocene Diatomaceous Rock Unit on the Oregon Continental Shelf

G. A. Fowler, W. N. Orr and L. D. Kulm
The Journal of Geology
Vol. 79, No. 5 (Sep., 1971), pp. 603-608
Stable URL: http://www.jstor.org/stable/30059990
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
An Upper Miocene Diatomaceous Rock Unit on the Oregon Continental Shelf
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Abstract

Samples of diatomaceous sedimentary rock from the Oregon continental shelf appear to have come from a definable stratigraphic unit. This unit may be, in part, a correlative of the Pullen Formation of northern California. Diatoms and silicoflagellates from the offshore rock unit suggest a Delmontian (late Miocene) age. This occurrence of diatomaceous upper Miocene rock on the Oregon shelf adds to the growing list of such occurrences in the upper Miocene around the Pacific.

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