Publications
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Organic composition of some Upper Cretaceous shale, Powder River Basin, Wyoming
The lower Upper Cretaceous strata in northeastern Wyoming, which have yielded major quantities of oil and gas, were sampled at boreholes in Converse, Johnson, and Weston Counties. Cores of noncalcareous shale of largely nearshore-marine origin were obtained from the Frontier Formation and the overlying Cody Shale at depths of 3,780.6 to 3,879.9 m in Converse County, near the axis of the Powder Riv
Authors
E. Allen Merewether, G. E. Claypool
Preliminary geologic map of the Loma-Prieta Quadrangle, Santa Cruz and Santa Clara counties, California
No abstract available.
Authors
T.W. Dibblee, Earl E. Brabb
Preliminary geologic map of the La Honda and San Gregorio quadrangles, San Mateo County, California
No abstract available.
Authors
Earl E. Brabb
Porosity evolution of upper Miocene reefs, Almeria Province, southern Spain
Sea cliffs 40 km east of Almeria, southeastern Spain, expose upper Miocene reefs and patch reefs of the Plomo formation. These reefs are formed of scleractinian corals, calcareous algae, and mollusks. The reef cores are as much as 65 m thick and several hundred meters wide. Fore-reef talus beds extend 1,300 m across and are 40 m thick. The reefs and reef breccias are composed of calcitic dolomite.
Authors
A. K. Armstrong, P. D. Snavely, W. O. Addicott
Metamorphic infrastructure in the northern Ruby Mountains, Nevada
The metamorphic complex of the northern Ruby Mountains in northeastern Nevada exposes Paleozoic strata that are metamorphosed to sillimanite grade, migmatized, and recumbently folded. Nappes are variously overturned to the east, north, south, and west. The deeper part of this metamorphic infrastructure is a migmatitic zone pervaded by pegmatitic two-mica granite. A structurally higher transition z
Authors
Keith A. Howard
What can grade-tonnage relations really tell us?
No abstract available.
Authors
Donald A. Singer, John H. DeYoung
Some quantitative properties of mineral deposits
No abstract available.
Authors
W. D. Menzie, Donald A. Singer
Geological Survey research 1980
A summary of recent significant scientific and economic results accompanied by a list of geologic, hydrologic, and cartographic investigations in progress.
Authors
The Klamath Mountains and Coast Ranges in northern California and southern Oregon: Chapter II-B
No abstract available.
Authors
W. P. Irwin, P.E. Hotz
Tertiary paleontology and stratigraphy of the central Santa Cruz Mountains, California Coast Ranges
No abstract available.
Authors
J. C. Clark, E. E. Brabb, W. O. Addicott
Comments and replies on ‘Biostratigraphy and magnetostratigraphy of Paleocene terrestrial deposits, San Juan Basin, New Mexico’: Comment
No abstract available.
Authors
James E. Fassett