Chemical data and variation diagrams of igneous rocks from the Timber Mountain-Oasis Valley Caldera Complex, southern Nevada
Open-File Report
77-724
By: W. D. Quinlivan and F. M. Byers
Links
- Document: Report (pdf)
- Plates:
- NGMDB Index Page: National Geologic Map Database Index Page (html)
- Download citation as: RIS | Dublin Core
Abstract
Silica variation diagrams presented here are based on 162 chemical analyses of tuffs, lavas, and intrusives, representative of volcanic centers of the Timber Mountain-Oasis Valley caldera complex and cogenetic rocks of the Silent Canyon ca1dera. Most of the volcanic units sampled are shown on the U.S. Geological Survey geologic map of the Timber Mountain caldera area (I-891) and are described in U.S. Geological Survey Professional Paper 919. Early effusives of the complex, although slightly altered, are probably chemically, and petrographically, more like the calc-alkalic Fraction Tuff (Miocene) of the northern Nellis Air Force Base Bombing and Gunnery Range to the north, whereas effusives of later Miocene age, such as the Paintbrush and Timber Mountain Tuffs, are alkali-calcic.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Chemical data and variation diagrams of igneous rocks from the Timber Mountain-Oasis Valley Caldera Complex, southern Nevada |
| Series title | Open-File Report |
| Series number | 77-724 |
| DOI | 10.3133/ofr77724 |
| Year Published | 1977 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | Report: ii, 9 p.; 14 Plates: 22.00 × 23.00 inches or smaller |
| Country | United States |
| State | Nevada |
| Other Geospatial | Timber Mountain-Oasis Valley Caldera Complex |
| Google Analytic Metrics | Metrics page |