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Preliminary composite magnetic anomaly map of part of the Northwestern United States
Isidore Zietz
1981, Open-File Report 81-835
The magnetic anomaly data open-filed in this report represent part of a much larger data set covering most of the conterminous United States. The anomaly map consists of 10 sheets covering an area in the northwestern United States. These were prepared primarily from existing aeromagnetic data, and secondarily from ground...
A socioeconomic assessment of the Cache Creek drilling site, Wyoming
Wyoming Research Corp.
1981, Open-File Report 81-862
This report analyzes the potential socioeconomic impacts of drilling two exploratory wells in the immediate vicinity of Jackson, Wyoming in Cache Creek Canyon and Little Granite Creek Canyon.The following conclusions are derived from a review of population projections, an analysis of secondary socioeconomic information, informal interviews of local residents, and...
Western hemisphere strong-motion accelerograph station list, 1980
J. Switzer, D. Johnson, R. Maley, R. Matthiesen
1981, Open-File Report 81-664
This list contains information on western hemisphere strong-motion stations that have been installed and are maintained by many different organizations. It contains information on all of those stations for which there is some data in the files of the USGS, but the list is incomplete even for stations in the...
Model of the ground-water flow system of the Gordo and Eutaw aquifers in west-central Alabama
Richard Alfred Gardner
1981, Open-File Report 80-422
Hydrologic conditions for a two-aquifer system consisting of the Gordo and Eutaw aquifers of Cretaceous age in west-central Alabama were simulated using a three-dimensional finite difference digital model. The model was calibrated to observed heads in the aquifers using a least squares method for obtaining the values for hydraulic parameters...
Paleomagnetic study of the As Sarat volcanic field, southwestern Saudi Arabia
Karl S. Kellogg, Richard L. Reynolds
1981, Open-File Report 81-675
Four stratigraphic sections through alkali basalt flows of Oligocene-Miocene age (24 to 29 m.y.) in the As Sarat volcanic field, southwestern Saudi Arabia, were sampled for paleomagnetic study. Forty-two magnetically acceptable flows (139 samples) yield a mean direction of magnetization of D=-4.7°, 1=15.2° (α95=4.3°), which defines a paleomagnetic pole at...
The U.S. Geological Survey in Alaska; 1981 programs
Robert F. Gilmore, Linda-Lee Harris, Lisa D. Tennison
Katherine M. Reed, editor(s)
1981, Circular 843
This Circular describes the 1981 programs and projects of the U.S. Geological Survey in Alaska. A brief description of the Alaskan operations of each office and division of the Survey is followed by project descriptions arranged by geographic regions in which the work takes place. The largest program at present...
Water resources data for Hawaii and other Pacific areas, water year 1980: Volume 1. Hawaii
Water Resources Division, U.S. Geological Survey
1981, Water Data Report HI-80-1
Volume 1 of water resources data for the 1980 water year for Hawaii and other Pacific Areas consist of records of stage, discharge, and water quality of streams; and water levels and water quality in wells and springs. This report contains discharge records for 109 gaging stations; water quality for...
Water resources data for Ohio, water year 1980: Volume 2. St. Lawrence River Basin
Water Resources Division, U.S. Geological Survey
1981, Water Data Report OH-80-2
Water resources data for the 1980 water year for Ohio consist of records of stage, discharge, and water quality of streams; stage and contents, and water quality of lakes and reservoirs; and water levels and water quality of ground-water wells. This report in two volumes and one appendix contains records...
Digital seismograms of aftershocks of the Imperial Valley, California, earthquake of October 15, 1979
Joe B. Fletcher, Ricardo L. Zepeda, David M. Boore
1981, Open-File Report 81-655
This report presents the digital seismograms collected for the aftershocksof the Imperial Valley, California earthquake (ML = 6.6) that occurred onL October 15, 1979. A short summary follows that describes the field procedures, instrumentation, and routine computer analysis that was used to produce the ground motion time histories. Boore and...
Statistical analyses of data on stream sediments, panned heavy-mineral concentrates, rocks, and waters of the Pusch Ridge Wilderness Area, Arizona
Margaret Hinkle, J.E. Kilburn, R. G. Eppinger, W. S. Speckman
1981, Open-File Report 81-436
The U.S. Geological Survey and the U.S. Bureau of Mines have conducted a mineral-resource assessment of the Pusch Ridge Wilderness Area, in Pima County near Tucson Arizona. The study consisted of coordinated geological, geochemical, and mineral resource studies with the objective of evaluating the potential for mineral deposits in the...
Cooperative tectonic studies from seismic network in central Italy
L. Seeber, C.H. Scholz
1981, Open-File Report 81-92
The purpose of the subject contract work was to explore the possibility of tectonic research-work based on seismic data from a local network carried out as a cooperative effort between the Institute Nazionale di Geofisica (ING), Rome, and Columbia University (L-DGO), New York. This effort has been rather successful, and...
Distribution of benthic chlorophyll in San Francisco Bay, California, February 1980 - February 1981
Janet Kay Thompson, Frederic H. Nichols, Sally M. Wienke
1981, Open-File Report 81-1134
Benthic microalgae biomass (chlorophyll a) data from San Francisco Bay are presented for the period February 1980 through February 1981. Benthic chlorophyll a was sampled throughout the bay (maximum of 54 stations) at bimonthly intervals and at monthly intervals at up to 14 stations in the southern bay. Ancillary data...