Publications
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Density and magnetic susceptibility values for rocks in the Talkeetna Mountains and adjacent region, south-central Alaska
This report presents a compilation and statistical analysis of 306 density and 706 magnetic susceptibility measurements of rocks from south-central Alaska that were collected by U.S. Geological Survey (USGS) and Alaska Division of Geological and Geophysical Surveys (ADGGS) scientists between the summers of 1999 and 2002. This work is a product of the USGS Talkeetna Mountains Transect Project and w
Authors
Elizabeth A. Sanger, Jonathan M. G. Glen
Isostatic gravity map with simplified geology of the Los Angeles 30 x 60 minute quadrangle
This isostatic residual gravity map is part of the Southern California Areal Mapping Project (SCAMP) and is intended to promote further understanding of the geology in the Los Angeles 30 x 60 minute quadrangle, California, by serving as a basis for geophysical interpretations and by supporting both geological mapping and topical (especially earthquake) studies. Local spatial variations in the Eart
Authors
R .J. Wooley, R.F. Yerkes, V. E. Langenheim, F. C. Chuang
Preliminary geologic map of the Perris 7.5' quadrangle, Riverside County, California
Open-File Report 03-270 contains a digital geologic map database of the Perris 7.5’ quadrangle, Riverside County, California that includes:1. ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map.2. A Postscript file to plot the geologic map on a topographic base, and containing a Correlation of Map Units diagra
Authors
Douglas M. Morton, Kelly R. Bovard, Rachel M. Alvarez
Assessment of undiscovered oil and gas resources of the Black Warrior Basin Province, 2002
Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 8.5 trillion cubic feet of undiscovered natural gas, a mean of 5.9 million barrels of undiscovered oil, and a mean of 7.6 million barrels of undiscovered natural gas liquids in the Black Warrior Basin Province.
Authors
Joseph R. Hatch, Mark J. Pawlewicz, Ronald R. Charpentier, Troy A. Cook, Robert A. Crovelli, Timothy R. Klett, Richard M. Pollastro, Christopher J. Schenk
Location and age of foraminifer samples collected by Chevron Petroleum geologists in California
Most of the geologic maps published for parts of central California in the past century have been made without the benefit of ages from microfossils. The ages of Jurassic, Cretaceous and Tertiary rocks in the mostly poorly exposed and structurally complex sedimentary rocks represented in the Coast Ranges are critical in determining stratigraphic succession or lack of it, and in determining whether
Authors
Earl E. Brabb, John M. Parker
National Geochronological Database
The National Geochronological Data Base (NGDB) was established by the United States Geological Survey (USGS) to collect and organize published isotopic (also known as radiometric) ages of rocks in the United States. The NGDB (originally known as the Radioactive Age Data Base, RADB) was started in 1974. A committee appointed by the Director of the USGS was given the mission to investigate the feasi
Authors
Jan Revised by Sloan, Christopher D. Henry, Melanie Hopkins, Steve Ludington, Robert E. Zartman, Charles A. Bush, Carl Abston
Structural plays in Ellesmerian sequence and correlative strata of the National Petroleum Reserve, Alaska
Reservoirs in deformed rocks of the Ellesmerian sequence in southern NPRA are assigned to two hydrocarbon plays, the Thrust-Belt play and the Ellesmerian Structural play. The two plays differ in that the Thrust-Belt play consists of reservoirs located in allochthonous strata in the frontal part of the Brooks Range fold-and-thrust belt, whereas those of the Ellesmerian Structural play are located i
Authors
Thomas E. Moore, Christopher J. Potter
Use of a probabilistic neural network to reduce costs of selecting construction rock
Rocks used as construction aggregate in temperate climates deteriorate to differing degrees because of repeated freezing and thawing. The magnitude of the deterioration depends on the rock's properties. Aggregate, including crushed carbonate rock, is required to have minimum geotechnical qualities before it can be used in asphalt and concrete. In order to reduce chances of premature and expensive
Authors
Donald A. Singer, James D. Bliss
Geologic database for digital geology of California, Nevada, and Utah— An application of the North American Data Model
The USGS is creating an integrated national database for digital state geologic maps that includes stratigraphic, age, and lithologic information. The majority of the conterminous 48 states have digital geologic base maps available, often at scales of 1:500,000. This product is a prototype, and is intended to demonstrate the types of derivative maps that will be possible with the national integrat
Authors
David R. Bedford, Steve Ludington, Constance M. Nutt, Paul A. Stone, David M. Miller, Robert J. Miller, David L. Wagner, George J. Saucedo
Preliminary geologic map of the Murrieta 7.5' quadrangle, Riverside County, California
The Murrieta quadrangle is located in the northern part of the Peninsular Ranges Province and includes parts of two structural blocks, or structural subdivisions of the province. The quadrangle is diagonally crossed by the active Elsinore fault zone, a major fault zone of the San Andreas fault system, and separates the Santa Ana Mountains block to the west from the Perris block to the east. Both
Authors
Michael P. Kennedy, Douglas M. Morton
Preliminary northeast Asia geodynamics map
This map portrays the geodynamics of Northeast Asia at a scale of 1:5,000,000 using the concepts of plate tectonics and analysis of terranes and overlap assemblages. The map is the result of a detailed compilation and synthesis at 5 million scale and is part of a major international collaborative study of the Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia conducted from 1997 th
Authors
Leonid M. Parfenov, Alexander I. Khanchuk, Gombosuren Badarch, Robert J. Miller, Vera V. Naumova, Warren J. Nokleberg, Masatsugu Ogasawara, Andrei V. Prokopiev, Hongquan Yan
Digital depth horizon compilations of the Alaskan North Slope and adjacent Arctic regions
Data have been digitized and combined to create four detailed depth horizon grids spanning the Alaskan North Slope and adjacent offshore areas. These map horizon compilations were created to aid in petroleum system modeling and related studies. Topography/bathymetry is extracted from a recent Arctic compilation of global onshore DEM and satellite altimetry and ship soundings offshore. The Lower Cr
Authors
Richard W. Saltus, Kenneth J. Bird