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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
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/30059990
Page Count: 6
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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.
The Journal of Geology © 1971 The University of Chicago Press