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(Article of periodic en Anglais - 1985)

Document title

Correlation of Late Quaternary tephra Layers in a long pluvial sequence near Summer Lake, Oregon

Authors(s) and Affiliation(s)

DAVIS J. O. ;

Abstract

Near Summer Lake in southern Oregon, 54 tephra beds of late Quaternary age are exposed in pluvial lake sediments of lake Chewaucan. Seven of the tephra beds near the top can be correlated with tephra deposits younger than 117,000 yr at Mount St. Helens, Washington, at Crater Lake, Oregon, and in northwestern Nevada in the deposits of pluvial Lake Lahontan. These seven tephra beds are from 6800 to about 90,000 yr old. Extrapolation of these ages through assumption of constant depositional rate implies an age of more than 335,000 yr for the bottom of the exposed section at Summer Lake.

Source

Article of periodic

published at : Quaternary research New York

Editor :

Millesime : 1985, vol. 23, no1 [pp. 38-53]

Bibliographic references : 37 réf.

Language

Anglais

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