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Geosciences
No abstract available.
Authors
Roger D. Borcherdt, N. C. Donovan, D. Eberhart-Phillips, A. Michael, Paul A. Reasenberg, L. Dietz, W. Ellsworth, Daniel J. Ponti, Ray E. Wells, R. A. Haugerud, M. M. Clark, N. T. Hall
Occurrence and geochemistry of natural gases, Piceance Basin, northwest Colorado
The Piceance basin is a hydrocarbon-rich province that has natural gas production from reservoirs ranging in age from Late Jurassic to Eocene and large undeveloped resources of natural gas in coal beds and tight sandstone reservoirs of Cretaceous age. Gases from all producing intervals are of predominantly thermal origin and become isotopically heavier (delta isotope{13}C[1]: -51.3 to -29.1 o/oo)
Authors
Ronald C. Johnson, Dudley D. Rice
Coal and peat in the sub-Saharan region of Africa: alternative energy options?
Increased energy demand as a result of growth in population, trends to sedentation and urbanization, and the desire for improvement in living standards, coupled with apparent climatic changes, are reducing fuelwood availability and contributing to deforestation and desertification in the sub‐Saharan countries. In 14 of those countries, the transport, industrial, and electric power generation secto
Authors
Jean Noe Weaver, Edwin R. Landis
Sedimentology and petroleum occurrence, Schoolhouse Member, Maroon Formation (Lower Permian), northwestern Colorado
The Lower Permian Schoolhouse Member of the Maroon Formation forms a partly exhumed petroleum reservoir in the Eagle basin of northwestern Colorado. The Schoolhouse consists mainly of yellowish gray to gray, low-angle to parallel bedded, very fine to fine-grained sandstone of eolian sand-sheet origin; interbedded fluvial deposits are present in most sections. Geological and geochemical data sugges
Authors
Samuel Y. Johnson, Christopher J. Schenk, D. L. Anders, Michele L. Tuttle
Program to prepare standard figures for grade-tonnage models on a Macintosh
Grade-tonnage models are frequency distributions of deposit tonnage and grades of mineral deposits of a specific type. The program described here allows users to prepare standard figures of grade and tonnage distributions and display the deposit name associated with any of the data points. Titles and scales appropriate for most deposit types are plotted automatically for tonnage, Cu, Ni, Sn, Nb, W
Authors
Donald A. Singer, James D. Bliss
Evolution of the Tertiary La Honda basin, central California
Tertiary strata of the La Honda basin are exposed in the Santa Cruz Mountains along the central California coast south of San Francisco. The basin fill has a composite thickness of more than 14,500 m and consists of sedimentary and volcanic rocks that in places rest on granitic basement rocks of the Salinia terrane. Paleogene strata are mainly turbidite sandstone and hemipelagic mudstone that accu
Authors
Richard G. Stanley
Review of paleomagnetic data from the Klamath Mountains, Blue Mountains, and Sierra Nevada; Implications for paleogeographic reconstructions
Paleomagnetic studies of the Klamath Mountains, Blue Mountains, Sierra Nevada, and northwestern Nevada pertain mostly to Jurassic and Cretaceous rocks, but some data also are available for Permian and Triassic rocks of the region. Large vertical-axis rotations are indicated for rocks in many of the terranes, but few studies show statistically significant latitudinal displacements. The most complet
Authors
Edward A. Mankinen, William P. Irwin
Maps showing elevation of bedrock and implications for design of engineered structures to withstand earthquake shaking in San Mateo County, California
No abstract available.
Authors
W.H. Hensolt, E. E. Brabb
Preliminary maps showing landslide deposits and related features in New Mexico
No abstract available.
Authors
Mauro Cardinali, Fausto Guzzetti, Earl E. Brabb
Mineral resources of the Mount Pennell Wilderness Study Area, Garfield County, Utah
No abstract available.
Authors
Russell F. Dubiel, C. S. Bromfield, S. E. Church, W. M. Kemp, M. J. Larson, Fred Peterson, C. T. Pierson, D. D. Gese
The San Andreas Fault System, California
Maps of northern and southern California printed on flyleaf inside front cover and on adjacent pages show faults that have had displacement within the past 2 million years. Those that have had displacement within historical time are shown in red. Bands of red tint emphasize zones of historical displacement; bands of orange tint emphasize major faults that have had Quaternary displacement before hi
By
Energy and Minerals Mission Area, Natural Hazards Mission Area, Earthquake Hazards Program, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Earthquake Science Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center