Publications
Filter Total Items: 2670
Geological Survey research 1960; Short papers in the geological sciences
No abstract available.
Authors
K-feldspar content of Jurassic and Cretaceous graywackes of northern Coast Ranges and Sacramento Valley, California
Graywackes of Late Jurassic to Late Cretaceous age are the predominant rocks in the northern Coast Ranges and the western Sacramento Valley provinces in California. These graywackes are similar in appearance, but their content of K-feldspar, which can be readily estimated after selective staining, differs widely. Study of several hundred specimens indicates that K-feldspar content is helpful in co
Authors
Edgar Herbert Bailey, William Porter Irwin
Geologic observations in the epicentral area of the San Francisco earthquake of March 22, 1957
No abstract available.
Authors
Manuel G. Bonilla
Franciscan group in Coast Ranges and its equivalents in Sacramento Valley, California
The Franciscan group is an assemblage of detrital and chemical sedimentary and volcanic rocks that crops out discontinuously in a structurally complex, northwesterly trending belt along the Coast Ranges of Cahfornia. On the east, along the west side of the Sacramento Valley, a thick section of detrital sedimentary rocks has been subdivided into the Knoxville, Paskenta, and Horsetown forma tions of
Authors
William P. Irwin
Geology, mineral resources, and mineral industry: Appendix
No abstract available.
Authors
W. P. Irwin, D.B. Tatlock, F. Weibelt, G.B. Shea, R.B. Mauerer
Tungsten in southeastern California: Chapter 8
No abstract available.
Authors
P. C. Bateman, W. P. Irwin