Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2481
Preliminary geologic analysis of the Apollo 17 site Preliminary geologic analysis of the Apollo 17 site
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Preliminary report on the geology and field petrology at the Apollo 17 landing site Preliminary report on the geology and field petrology at the Apollo 17 landing site
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Cretaceous mafic conglomerate near Gualala offset 350 miles by San Andreas fault from oceanic crustal source near Eagle Rest Peak, California Cretaceous mafic conglomerate near Gualala offset 350 miles by San Andreas fault from oceanic crustal source near Eagle Rest Peak, California
Upper Cretaceous mafic conglomerate and quartz-plagioclase arkose that crop out on the southwest side of the San Andreas fault near Gualala, Calif., may have been eroded from a gabbroic terrane that now lies about 350 miles to the southeast, on the opposite side of the San Andreas fault. The plagioclase arkose near Gualala contains little or no K-feldspar, and the conglomerate is...
Authors
Donald C. Ross, Carl M. Wentworth, Edwin D. McKee
Geology of Hadley Rille Geology of Hadley Rille
No abstract available.
Authors
Keith A. Howard, J. W. Head, G.A. Swann
Structure of Sierra Madera, Texas, as a guide to central peaks of lunar craters Structure of Sierra Madera, Texas, as a guide to central peaks of lunar craters
Like hundreds of other lunar craters of probable impact origin, Copernicus contains central peaks presumed to expose rocks uplifted from beneath the crater floor. A possible analog of these peaks on Earth is the central uplift of the Sierra Madera cryptoexplosion structure, a probable impact scar (astrobleme) in stratified Permian and Cretaceous rocks of west Texas. The most conspicuous...
Authors
Keith A. Howard, Terry W. Offield, H. G. Wilshire
Paleomagnetic correlations and Potassium-Argon dating of Middle Tertiary ash-flow sheets in the eastern Great Basin, Nevada and Utah Paleomagnetic correlations and Potassium-Argon dating of Middle Tertiary ash-flow sheets in the eastern Great Basin, Nevada and Utah
Directions of natural remanent magnetization are used to identify and correlate individual cooling units in the middle Tertiary ash-flow province in central and eastern Nevada and western Utah. Potassium-argon dating indicates that the minimum time between eruptions of individual but genetically related ash-flow cooling units is on the order of 0.8 m.y. As this interval is long in...
Authors
C. S. Grommé, E.H. McKee, M. Clark Blake
Geologic setting of the Apollo 15 samples Geologic setting of the Apollo 15 samples
The samples and photographs returned from the Apollo 15 site show that Hadley Delta is largely underlain by breccias whose clasts are mainly fragments of coarse-grained feldspathic rocks and nonmare-type basalt. Conspicuous sets of lineaments, visible in surface and orbital photographs of Mount Hadley and Hadley Delta, may represent systematic layering or fracture sets. The mare surface...
Authors
G.A. Swann, N. G. Bailey, R. M. Batson, V. L. Freeman, M. H. Hait, H. E. Holt, K.B. Larson, V. S. Reed, G. G. Schaber, R. L. Sutton, E.W. Wolfe, Keith A. Howard, H. G. Wilshire, J.W. Head, J.B. Irwin, D.R. Scott, W.R. Muehlberger, L. T. Silver, J. J. Rennilson
Paleomagnetism and potassium-argon ages of the Sonoma Volcanics, California Paleomagnetism and potassium-argon ages of the Sonoma Volcanics, California
Paleomagnetic data and potassium-argon ages indicate that the Sonoma Volcanics was erupted during the Pliocene Gilbert reversed and Gauss normal polarity epochs. The Gilbert reversed epoch is represented in the Howell Mountains east of Napa and east of St. Helena, in the mountains immediately east of the Valley of the Moon, and on the hill just north of Santa Rosa. The Gauss normal epoch...
Authors
Edward A. Mankinen
Seismic, magnetic and gravity profiles — Chukchi Sea and adjacent Arctic Ocean, 1972: Part 1, seismic reflection profiles Seismic, magnetic and gravity profiles — Chukchi Sea and adjacent Arctic Ocean, 1972: Part 1, seismic reflection profiles
No abstract available.
Authors
Arthur Grantz, M.L. Holmes, D. C. Riley, S. L. Wallace
Principal facts for gravity stations in the area north of the Grand Canyon in Arizona Principal facts for gravity stations in the area north of the Grand Canyon in Arizona
Observed gravity values, station location, terrain corrections, and Bouguer gravity data are provided in tabular form for approximately 610 gravity observations in northern Arizona. These data were used in preparation of - - Popenoe, Peter, 1968, Complete Bouguer gravity anomaly map of the area north of the Grand Canyon in Arizona: U.S. Geol. Survey open-file report.
Authors
Peter Popenoe
Principal facts for gravity stations for the Central Arizona Project Principal facts for gravity stations for the Central Arizona Project
Observed gravity values, station locations, terrain corrections, and Bouguer gravity data are provided in tabular form for approximately 2460 gravity observations in south-central Arizona. "These data were used in preparation of -- Peterson, Donald L., 1968, Bouguer gravity map of parts of Maricopa, Pima, Pinal, and Yuma Counties, Arizona: U.S. Geol. Survey Geonhvs. Inv. Map GP-615.
Authors
Donald L. Peterson
Principal facts for gravity stations in the San Francisco district and adjoining areas, Utah Principal facts for gravity stations in the San Francisco district and adjoining areas, Utah
Observed gravity values, station locations, terrain corrections, and Bouguer gravity data are provided in tabular form for approximately 450 gravity observations in southwestern Utah.
Authors
Donald L. Peterson