Open-File Report 2013–1146
AbstractWe present geochronologic and geochemical data for Mesozoic rocks in the Black Mountain area northeast of Victorville, California, to supplement previous geologic mapping. These data, together with previously published results, limit the depositional age of the sedimentary Fairview Valley Formation to Early Jurassic, refine the ages and chemical compositions of selected units in the overlying Jurassic Sidewinder Volcanics and of related intrusive units, and limit the age of some post-Sidewinder faulting in the Black Mountain area to a brief interval in the Late Jurassic. The new information contributes to a more complete understanding of the Mesozoic magmatic and tectonic evolution of the western Mojave Desert and surrounding regions. |
First posted July 19, 2013 For additional information: This report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge. |
Stone, P., Barth, A.P., Wooden, J.L., Fohey-Breting, N.K., Vazquez, J.A., and Priest, S.S., 2013, Geochronologic and geochemical data from Mesozoic rocks in the Black Mountain area northeast of Victorville, San Bernardino County, California: U.S. Geological Survey Open-File Report 2013–1146, 31 p., http://pubs.usgs.gov/of/2013/1146/.
Abstract
Introduction
Geologic Framework
Samples for Geochronologic and Geochemical Analysis
Geochronologic Data
Geochemical Data
Paleozoic to Jurassic History
Summary
Acknowledgments
References Cited