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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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Crystal formation in furunculosis agar
SINCE ITS INTRODUCTION SOME MONTHS AGO, FURUNCULOSIS AGAR has been employed in the diagnosis of suspect furunculosis and also as a general purpose medium. During our work with this medium we have noticed discrete "colonies," of crystalline material, which very closely resemble microbial colonies. These crystal colonies are compact and appear on both the surface and subsurface; they occur in inocul
Authors
G. L. Bullock, A. J. Ross
Distribution of narrow-width magnetic anomalies in Antarctica
Data for aeromagnetic profiles obtained in Antarctica during the 1963-64 austral summer were used together with earlier results to construct a map showing the areal distribution of narrow-width magnetic anomalies. Numerous anomalies are associated with known volcanic mountains in western Antarctica. A large area of few anomalies is probably a result of an extension of the thick metasedimentary sec
Authors
John C. Behrendt
Equilibrium of talc with enstatite and quartz
A thermodynamic calculation of the vapor pressure of H20 in equilibrium with talc gives pH2O of one atmosphere at 718° ± 15°K in contradiction to the results of Mueller.
Authors
R. A. Robie
Feeding by three species of fishes on the eggs of spawning alewives
No abstract available.
Authors
Thomas A. Edsall
Fused rock from Köfels, Tyrol
The vesicular glass from Köfels, Tyrol, contains grains of quartz that have been partially melted but not dissolved in the matrix glass. This phenomenon has been observed in similar glasses formed by friction along a thrust fault and by meteorite impact, but not in volcanic glasses. The explosion of a small nuclear device buried behind a steep slope produced a geologic structure that is a good sma
Authors
Daniel J. Milton
Genesis of the Arctic Ocean Basin
High-altitude aeromagnetic surveys provide new data on the earth's crust in this remote area.
Authors
E. R. King, I. Zietz, L.R. Alldredge
Geographic data from space
Space science has been called “the collection of scientific problems to which space vehicles can make some specific contributions not achievable by ground-based experiments.” Geography, the most spatial of the sciences, has now been marked as one of these “space sciences.” The National Aeronautics and Space Administration (NASA) is sponsoring an investigation to identify the Potential geographic b
Authors
Robert H. Alexander
Geographic distribution of some species of trichodinids (Ciliata: Peritricha) parasitic on fishes
No abstract available.
Authors
J. Lom, G. L. Hoffman
Geomagnetic polarity epochs
[No abstract available]
Authors
A. Cox, Richard R. Doell, G. Brent Dalrymple
Ground water in North America
The fast-growing demands on this natural resource expose a need to resolve many hydrologic unknowns.
Authors
Harold E. Thomas, Luna Bergere Leopold