Publications
Browse recent USGS publications related to energy resources.
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Implications of paleomagnetism for the tectonic history of the Eastern Klamath and related terranes in California and Oregon Implications of paleomagnetism for the tectonic history of the Eastern Klamath and related terranes in California and Oregon
Paleomagnetic study of Permian to Jurassic volcanic and sedimentary strata of the Eastern Klamath terrane has shown the remanent magnetism of these rocks to be prefolding and primary. The Permian and Triassic rocks are both indicated to have rotated 100° clockwise, while the Jurassic strata have rotated 60° clockwise. The respective amounts of rotation for Permian and Jurassic strata are...
Authors
Edward A. Mankinen, William P. Irwin, C. Sherman Gromme
Preliminary geologic map of the Red Bluff 1:100,000 Quadrangle, California Preliminary geologic map of the Red Bluff 1:100,000 Quadrangle, California
No abstract available.
Authors
M.C. Blake, D. S. Harwood, E. J. Helley, W. P. Irwin, A. S. Jayko, D. L. Jones
Proceedings of Conference XXIV; A workshop on Geologic Hazards in Puerto Rico Proceedings of Conference XXIV; A workshop on Geologic Hazards in Puerto Rico
No abstract available.
Authors
Walter W. Hays, Carls J. Kitzmiller, Lynne N. Downer
Correlation of metamorphosed Paleozoic strata of the southeastern Mojave Desert region, California and Arizona Correlation of metamorphosed Paleozoic strata of the southeastern Mojave Desert region, California and Arizona
Isolated outcrops of deformed, regionally metamorphosed Paleozoic strata are scattered within the southeastern Mojave Desert region of California and western Arizona. These strata unconformably overlie a basement of Proterozoic crystalline rocks and are overlain in turn by metamorphosed Mesozoic sedimentary rocks. The strata can be correlated lithostratigraphically with the classic...
Authors
Paul Stone, Keith A. Howard, Warren Hamilton
Review of "Orogeny," Miyashiro, A., Aki, K., and Sengor, A. M. C., eds., Wiley Review of "Orogeny," Miyashiro, A., Aki, K., and Sengor, A. M. C., eds., Wiley
No abstract available.
Authors
William P. Irwin
Conodonts of the western Paleozoic and Triassic belt, Klamath Mountains, California and Oregon Conodonts of the western Paleozoic and Triassic belt, Klamath Mountains, California and Oregon
Conodonts were extracted from 32 samples of limestone and 5 samples of chert obtained from the Western Paleozoic and Triassic belt of the Klamath Mountains province. Triassic conodonts were found in 17 samples, and late Paleozoic conodonts in 7 samples. Conodonts of the remaining 13 samples cannot be dated more closely than early or middle Paleozoic through Triassic. The late Paleozoic...
Authors
William P. Irwin, Bruce R. Wardlaw, T.A. Kaplan
Introduction Introduction
Tectonic and Stratigraphic Studies in the Eastern Great Basin is compiled as a tribute to Max D. Crittenden, Jr., whose geologic leadership and exemplary studies in the eastern Great Basin region have stimulated significant scientific advances. Many of the authors in this volume conducted their studies with assistance from Max, and much of the foundation for these studies is his work on...
Authors
D. M. Miller, Keith A. Howard
New data on the age of Lepidocyclina in California New data on the age of Lepidocyclina in California
During the 1930's and early 1940's, controversy about the age of Lepidocyclina californica and faunas associated with it led to unreconcilable differences of opinion in the attempt to provide a standard stratigraphic framework for Cenozoic rocks of western North America. Two standards with significantly different series age assignments were provided, one based largelyon benthic...
Authors
E. E. Brabb, Kristen McDougall, R.Z. Poore
Tectonic significance of Late Paleozoic to Jurassic radiolarians from the North Fork terrane, Klamath Mountains, California Tectonic significance of Late Paleozoic to Jurassic radiolarians from the North Fork terrane, Klamath Mountains, California
No abstract available.
Authors
Charles D. Blome, William P. Irwin
The ophiolitic North Fork terrane in the Salmon River region, central Klamath Mountains, California The ophiolitic North Fork terrane in the Salmon River region, central Klamath Mountains, California
The North Fork terrane is an assemblage of ophiolitic and other oceanic volcanic and sedimentary rocks that has been internally imbricated and folded. The ophiolitic rocks form a north-trending belt through the central part of the region and consist of a disrupted sequence of homogeneous gabbro, diabase, massive to pillowed basalt, and interleaved tectonitic harzburgite. U-Pb zircon age...
Authors
C.J. Ando, W. P. Irwin, D. L. Jones, J.B. Saleeby
Comment and reply on ‘Transgressive-regressive cycles and the occurrence of coal in some Upper Cretaceous strata of Utah’: Comment Comment and reply on ‘Transgressive-regressive cycles and the occurrence of coal in some Upper Cretaceous strata of Utah’: Comment
No abstract available.
Authors
James E. Fassett
Distribution and origin of sulfur in Colorado oil shale Distribution and origin of sulfur in Colorado oil shale
The sulfur content of 1,225 samples of Green River oil shale from two core holes in the Piceance Creek Basin, Colorado, ranges from nearly 0 to 4.9 weight percent. In one core hole, the average sulfur content of a sequence of oil shale 555 m thick, which represents nearly the maximum thickness of oil shale in the basin, is 0.76 weight percent. The vertical distribution of sulfur through...
Authors
John R. Dyni