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New late Oligocene echinoids from the central Western Cascades of Oregon

Published online by Cambridge University Press:  14 July 2015

Robert A. Linder
Affiliation:
1Department of Geology, University of Oregon, Eugene 97401
J. Wyatt Durham
Affiliation:
2Department of Paleontology, University of California, Berkeley 94720
William N. Orr
Affiliation:
1Department of Geology, University of Oregon, Eugene 97401

Abstract

The echinoids Salenia cascadensis n. sp., Stomechinus? dissimilaris n. sp., Glyptocidaris sp., Arbacia abiquaensis n. sp., Lytechinus baldwini n. sp., Gagaria crenularis n. sp., and Kewia marquamensis n. sp. occur in the Late Oligocene (Chattian) Scotts Mills Formation near Silverton, Oregon, just north of 45°N latitude. The echinoids occur in shallow-water sediments deposited among basaltic sea stacks along a rockbound, storm-dominated marginal marine environment. Except for Kewia, these occurrences mark a more northerly limit for these genera in the northeastern Pacific and add to their stratigraphic range.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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