Cenozoic volcanism and sedimentation, silver peak region, western Nevada and adjacent California

GSA Bulletin
By: , and 



Cenozoic deposits of the Silver Peak region, western Nevada, and adjacent California consist principally of continental sedimentary and pyroclastic rocks of the Esmeralda Formation and lavas and tuffs of the Silver Peak volcanic center.

The sedimentary rocks comprise several thick sequences of tuffaceous volcanic sandstone and siltstone and interbedded air-fall tuff. These rocks were deposited in basins that coincide in a general way with the present valleys. Thick wedges of conglomerate and sandstone occur along the basin margins and reflect source areas.

Most of the sedimentary rocks were deposited under fluctuating fluviatile and lacustrine conditions, but paludal conditions prevailed locally. Abrupt facies changes and numerous local unconformities indicate that deposition was not uniform within a given basin.

The sedimentary rocks range in age from late Miocene to late Pliocene. The oldest reliably dated rocks in the Esmeralda Formation are 13.1 m.y. by K-Ar (Barstovian), and all sedimentary strata are younger than an ash-flow sheet dated at 21.5 m.y. by K-Ar. An air-fall tuff in the upper part of the section has a K-Ar age of 4.3 m.y.

Rocks of the Silver Peak volcanic center, 4.8 to 6.1 m.y. by K-Ar, crop out principally in the central part of the Silver Peak Range. Along the margins of the range, they overlie and interfinger with the various sedimentary sequences. The volcanic rocks are mostly rhyolite and trachyandesite tuffs and flows with subordinate basalts and andesites.

Basin and Range faulting began in late early to middle Miocene time and has continued intermittently to the present, but present topography was largely established by late Pliocene time.

Study Area

Publication type Article
Publication Subtype Journal Article
Title Cenozoic volcanism and sedimentation, silver peak region, western Nevada and adjacent California
Series title GSA Bulletin
DOI 10.1130/MEM116-p577
Volume 116
Year Published 1968
Language English
Publisher Geological Society of America
Description 36 p.
Larger Work Type Book
Larger Work Subtype Monograph
Larger Work Title Studies in volcanology
First page 577
Last page 611
Country United States
State California, Nevada
Other Geospatial Silver Peak region
Google Analytics Metrics Metrics page
Additional publication details