Abstract
AbstractThe Trego Hot Springs tephra bed is a silicic tephra about 23,400 yr old, found at several localities in pluvial lake sediments in northern Nevada, southern Oregon, and northeastern California. It has been characterized petrographically, by the major and minor element chemistry of its glass, and by its stratigraphic position with respect to other tephra layers. At a newly described locality on Squaw Creek, northwest of Gerlach, Nevada, at the north end of the Smoke Creek Desert, Trego Hot Springs tephra has been found in sediments of the Sehoo and Indian Lakes formations. The depositional environments of these sediments show that when the tephra fell, pluvial Lake Lahontan stood between 1256 and 1260 m, and that immediately thereafter the lake rose to at least 1275 m. These data corroborate earlier findings by Benson (Quaternary Research9, 300–318) from radiometric dating of calcareous tufa. However, the Lake Lahontan area has been affected by isostatic subsidence and rebound in response to changing water loads, so that caution is required in the use of lakeshore elevations in correlation.
Publisher
Cambridge University Press (CUP)
Subject
General Earth and Planetary Sciences,Earth-Surface Processes,Arts and Humanities (miscellaneous)
Reference20 articles.
1. Bits and pieces: The last 35,000 years in the Lahontan area;Davis;Man and Environment in the Great Basin,1982
2. Geological history of Lake Lahontan, a Quaternary lake of northwestern Nevada;Russell;U.S. Geological Survey Monograph,1885
3. Rye Patch Dam;Morrison;Guidebook for Field Conference I Northern Great Basin and California,1965a
4. Badland amphitheatre on Truckee River north of Wadsworth;Morrison;Guidebook for Field Conference I Northern Great Basin and California,1965b
5. A paleomagnetic record from Pyramid Lake, Nevada, and its implications for proposed geomagnetic excursions
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