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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 more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Toxicological effects of herbicides on the fish environment Part 1
Abstract has not been submitted
Authors
C.R. Walker
Toxicological effects of herbicides on the fish environment Part 2
Abstract has not been submitted
Authors
C.R. Walker
Trapping levels and thermoluminescence of CsI doped with various activators
[No abstract available]
Authors
P. Martinez, F. E. Senftle, M. Page
Tritium-hydrologic research: Some results of the U.S. Geological Survey Research Program
In general tritium is of limited usefulness as a tool in hydrologic studies because the tritium content of ground water, as a result of radioactive decay, becomes too low to be detectable after about 50 years. Nevertheless, a unique study was made of the hydrologic cycle of small stream basins in Wisconsin and New Jersey on the basis of measurements relative to the peak of tritium fallout in the s
Authors
C.W. Carlston
Uses of antibiotics and other antimicrobials in therapy of diseases of fishes
No abstract available.
Authors
K. Wolf, S. F. Snieszko
Vapor pressure and vapor fractionation of silicate melts of tektite composition
The total vapor pressure of Philippine tektite melts of approximately 70 per cent silica has been determined at temperatures ranging from 1500 to 2100°C. This pressure is 190 ± 40 mm Hg at 1500°C, 450 ± 50 mm at 1800°C and 850 ± 70 mm at 2100° C. Determinations were made by visually observing the temperature at which bubbles began to form at a constant low ambient pressure. By varying the ambient
Authors
Louis S. Walter, M. K. Carron
Volcanic ash from Mount Mazama (Crater Lake) and from Glacier Peak
New petrographic and chemical data indicate that the great Mount Mazama eruption at Crater Lake, Oregon, about 6600 years ago was the source of most ash which has been called "Glacier Peak" and of some ash called "Galata." Glacier Peak volcano in Washington was itself the source of an older ash deposit, perhaps very late glacial or early postglacial in age.
Authors
H. A. Powers, R.E. Wilcox
By
Water in the world
The earth, Including Its oceans and atmosphere, ls a giant distillation system whose operation brings about the distribution of fresh water throughout the world, from the frozen wastes of polar regions to the burning equatorial deserts. Stated in the simplest terms, distillation, condensation and liquid flow are the elemental processes which, on a grand scale, distribute and circulate throughout t
Authors
Luna Bergere Leopold
Woodcock age and sex determination from wings
Age of woodcock (Philohela minor) can be accurately determined throughout the year by differences in pattern, color, and wear of secondary feathers. Immature woodcock retain most secondaries during the postjuvenal molt that begins in July or August and ends in October. In contrast, subadults (first-year adults) and older woodcock molt all secondaries during the postnuptial molt beginning in June o
Authors
F.W. Martin
Cathedral Cliffs formation, the early acid Breccia unit of northwestern Wyoming
The name Cathedral Cliffs Formation is proposed for the rocks in the Clarks Fork area of northwestern Wyoming that have long been known by the informal designation "early acid breccia." In the Clarks Fork area the Cathedral Cliffs Formation is composed of tuffs, with lesser amounts of volcanic sedimentary rocks and breccias. Its thickness ranges from less than 100 feet to about 1500 feet but more
Authors
W. G. Pierce
Geologic history of the teays valley in West Virginia
The segment of the abandoned pre-Pleistocene Teays Valley between Scary and Huntington, W. Va. stands 130-240 feet above the Ohio and Kanawha rivers, and its bedrock floor slopes westward at about 0.6 foot per mile. The bedrock floor is overlain by highly weathered gravel in which a soil profile developed; only resistant siliceous materials remain. As much as 100 feet of locally derived sediments
Authors
E. C. Rhodehamel, C.W. Carlston