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Publications

Products (journal articles, reports, fact sheets) authored by current and past scientists are listed below. Please check the USGS Pubs Warehouse for other USGS publications.

Filter Total Items: 1954

Geologic studies in Alaska by the U.S. Geological Survey, 1990 Geologic studies in Alaska by the U.S. Geological Survey, 1990

This collection of papers continues the annual series of U.S. Geological Survey (USGS) reports on geologic investigations in Alaska. From 1975 through 1988, the series was published as USGS circulars. The first of these appeared under the title "The United States Geological Survey in Alaska: Accomplishments during 1975," and the series continued to the last annual circular entitled...

Evidence for ammonium-bearing minerals on Ceres Evidence for ammonium-bearing minerals on Ceres

Spectra obtained from recent telescopic observation of 1-Ceres and laboratory measurements and theoretical calculations of three component mixtures of Ceres analog material suggest that an ammoniated phyllosilicate is present on the surface of the asteroid, rather than H2O frost as had been previously reported. The presence of an ammoniated phyllosilicate, most likely ammoniated saponite...
Authors
Trude V. V. King, Roger N. Clark, W. M. Calvin, David M. Sherman, R. H. Brown

A theoretical model for the flux of radon from rock to ground water A theoretical model for the flux of radon from rock to ground water

A model is derived to predict the abundance of 222Rn in ground water in contact with a rock of known uranium content. The model assumes that secular equilibrium is attained in the rock-water system as a whole, but is independent of any microscopic geometric properties of the system. The key variables in the model are bulk properties such as porosity, uranium content of the rock...
Authors
Richard B. Wanty, Errol P. Lawrence, Linda C. Gundersen

Crustal structure interpreted from magnetic anomalies Crustal structure interpreted from magnetic anomalies

In this review, we discuss publications during the last quadrennium (1987–1990) that used aeromagnetic data, marine magnetic data, satellite magnetic data, and rock magnetic and petrologic data to provide information on the sources of magnetic anomalies. Abstracts and papers by non‐U.S. authors are not described. The publications reviewed reflect increased integration of rock magnetic...
Authors
Jeffrey Phillips, Richard J. Reynolds, Herbert Frey

Late Devonian history of Michigan basin Late Devonian history of Michigan basin

The Upper Devonian sequence in the Michigan Basin is a westward extension of coeval cyclical facies of the Catskill deltaic complex in the Appalachian basin. Both basins and the intervening Findlay arch express the tectonic and sedimentational effects of foreland compression and isostatic compensation produced by the Acadian orogeny. The Late Devonian Michigan Basin formed as one of...
Authors
R.C. Gutschick, Charles Sandberg

Upper Devonian biostratigraphy of Michigan Basin Upper Devonian biostratigraphy of Michigan Basin

The Late Devonian Michigan Basin was floored by the Middle and Upper Devonian Squaw Bay Limestone, which was deposited during the downwarping that produced the basin within a former Middle Devonian carbonate platform. The Squaw Bay comprises three beds, each having a different conodont fauna. The two upper beds, deposited during the transitans Zone, have different conodont biofacies that...
Authors
R.C. Gutschick, Charles Sandberg
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