Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5321
Populations dynamics of the cactus mouse in two communities of mesquite. Presented before Arizona Academy of Sciences
No abstract available at this time
Authors
J. A. Howell
Recent and relict topography of Boo Bee patch reef, Belize
Five core borings were taken on and around Boo Bee Patch Reef to better understand the origin of such shelf lagoon reefs. The cores reveal 4 stages of development: (1) subaerial exposure of a Pleistocene "high" having about 8 meters of relief, possibly a Pleistocene patch reef; (2) deposition of peat and impermeable terrigenous clay 3 meters thick around the high; (3) initiation of carbonate sedim
Authors
R. B. Halley, E.A. Shinn, J.H. Hudson, B. Lidz
The status and distribution of woodcock in Oklahoma
The seasonal and spatial distributions of the American woodcock (Philohela minor) in Oklahoma were determined through field surveys and the collection of all known reports of woodcock sightings. Woodcock were reported in Oklahoma in all seasons and were most Jrequently sighted from 11 October to 10 January. The peak in fall migration occurred between 11 November and 10 December. Woodcock were fo
Authors
J.S. Barclay, R.W. Smith
The use of feeding habitat by a colony of herons, egrets, and ibises near Beaufort, North Carolina
Nine species of herons were followed to their feeding sites from a nesting colony near Beaufort, North Carolina, by airplane. Except for the Cattle Egret, which flew exclusively to fields and dumps, all other species flew mainly to saltmarsh habitat. In addition, habitats were selected in relation to tidal depth and it appears, at least for the Great Egret, that low tide habitats were preferred.
Authors
Thomas W. Custer
Recent and ancient sedimentary environments in Alaska
No abstract available.
Authors
T. H. Nilsen, E. E. Brabb, T.R. Simoni
Uranium resource assessment in the United States
Uranium is a ubiquitous element-- a little is found in nearly every natural occurring materials, and it is concentrated in many different geologic environments. Thus, uranium differs markedly from the fossil fuels both in its occurrence and how its resources can be assessed. On the one hand uranium behaves like other metals in its occurrences. On the other hand, as a fuel it is like the hydrocarbo
Authors
R. W. Schnabel, W.I. Finch
Instrumentation automatic collection of sediment data
No abstract available.
Authors
J. V. Skinner, J.P. Beverage
Mapping of mountain soils west of Denver, Colorado, for landuse planning
No abstract available.
Authors
P. W. Schmidt, Kenneth L. Pierce
Area of influence of exploratory drill holes under conditions of errors of recognition
No abstract available.
Authors
Donald A. Singer
Audio-magnetotelluric methods in reconnaissance geothermal exploration
An audio-magnetotelluric (AMT) system has been developed by the U.S. Geological Survey for low-cost reconnaissance exploration of geothermal regions. This is an electromagnetic sounding technique in which the scalar or Cagniard resistivity is computed at 12 frequencies logarithmically spaced from 7.5 to 18 600 Hz. Our system uses natural source fields except at the two upper frequencies of 10 200
Authors
D. B. Hoover, C. L. Long
Ecology of mangroves in the Jewfish Chain, Exuma, Bahamas
The structure and function of mangrove communities in the Jewfish Chain, Exumas, Bahamas, were investigated for 3-1/2 years. Mangrove vegetation in the Jewfish Chain is similar to that in all the Caribbean-Florida area; Rhizophora mangle L. dominates and is interspersed with Avicennia germinans (L.) Lamk. and Laguncularia racemosa (L.) Gaertn. There is no apparent zonation of these three species.
Authors
L. V. Wilcox, Thomas G. Yocom, A. M. Forbes