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A Neocene Erosion Surface in Central Oregon

Buwalda, John P. (1929) A Neocene Erosion Surface in Central Oregon. In: Contributions to Palaeontology. Publications of the Carnegie Institution of Washington. No.404. Carnegie institution of Washington , Washington, DC, pp. 1-10.

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A landscape, in the old age stage, termed the Ochoco Erosion Surface, bevels the Columbia lavas and Mascall formation of middle Miocene age at a large angle, and the Rattlesnake lower or middle Pliocene at a small angle, in parts of the Ochoco Range and the John Day country of central Oregon. North of the John Day country the Condon Erosion Surface, locally at least a peneplane, probably but at present not demonstrably the correlative of the Ochoco, truncates the Columbia lavas and perhaps The Dalles formation. A pause in the eventful diastrophic history of this part of the Northwest is apparently indicated by these features. Subsequently, during the present or Dayville cycle, the great gorges and valleys have been excavated.

Item Type:Book Section
Additional Information:© 1929 Carnegie institution of Washington. Presented before Geological Society of America, Cordilleran Section, at Berkeley, March 3, 1928.
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Other Numbering System NameOther Numbering System ID
Balch Graduate School of the Geological Sciences27
Series Name:Publications of the Carnegie Institution of Washington
Issue or Number:404
Record Number:CaltechAUTHORS:20191029-080620481
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99520
Deposited By: Tony Diaz
Deposited On:29 Oct 2019 16:41
Last Modified:29 Oct 2019 16:41

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