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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 5,500 book chapters 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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Whooping crane mortality at the Patuxent Wildlife Research Center, 1966-1981 Whooping crane mortality at the Patuxent Wildlife Research Center, 1966-1981
No abstract available.
Authors
J. W. Carpenter, S.R. Derrickson
Whooping crane production at the Patuxent Wildlife Research Center, 1967-1981 Whooping crane production at the Patuxent Wildlife Research Center, 1967-1981
No abstract available.
Authors
S.R. Derrickson, J. W. Carpenter
Woodcock brood ecology in Maine Woodcock brood ecology in Maine
Captures of 102 American woodcock (Philohela minor) broods, including 338 chicks, from 1977 to 1980 provided data on age-related production by breeding females and on growth and survival of chicks. Although broods of second-year females are smaller and hatch at slightly later dates and the growth of the chicks is slower than that of broods of after-second-year hens, we could detect no...
Authors
T.J. Dwyer, E.L. Derleth, D.G. McAuley
Paleogene calcareous nannofossils Paleogene calcareous nannofossils
No abstract available.
Authors
Laurel M. Bybell
Changes in the Seismicity and Focal Mechanism of Small Earthquakes Prior to an MS 6.7 Earthquake in the Central Aleutian Island Arc Changes in the Seismicity and Focal Mechanism of Small Earthquakes Prior to an MS 6.7 Earthquake in the Central Aleutian Island Arc
On November 4 1977, a magnitude Ms 6.7 (mb 5.7) shallow-focus thrust earthquake occurred in the vicinity of the Adak seismographic network in the central Aleutian island arc. The earthquake and its aftershock sequence occurred in an area that had not experienced a similar sequence since at least 1964. About 13 1/2 months before the main shock, the rate of occurrence of very small...
Authors
Serena Billington, E.R. Engdahl, Stephanie Price
Tectonic accretion of the Klamath Mountains Tectonic accretion of the Klamath Mountains
No abstract available.
Authors
W. P. Irwin
The complex of alkaline rocks at Iron Hill, Powederhorn district, Gunnison County, Colorado The complex of alkaline rocks at Iron Hill, Powederhorn district, Gunnison County, Colorado
No abstract available
Authors
T.J. Armbrustmacher
Illustrated geomorphic classification of Icelandic volcanoes Illustrated geomorphic classification of Icelandic volcanoes
In 1959, Sigurdur Thorarinsson published his first complete classification of the 13 principal types of basaltic volcanoes of Iceland (Figure 1). In 1968, Thorarinsson published a modification of his earlier classification scheme. Both landform classifications were based on the relationship of the type of eruptive products (lava, lava and tephra, or tephra), number of eruptions (one or...
Authors
Richard S. Williams, Elliot C. Morris
Survey for bright Mars-crossing asteroids Survey for bright Mars-crossing asteroids
A new method of search for relatively bright Mars-crossing asteroids with the Palomar 46-cm Schmidt camera was initiated in 1980. Selected fields photographed with the 46-cm Schmidt were systematically reduced for all asteroids detected on the films. The 46-cm Schmidt fields have an effective diameter of 8 3/4 degrees. Kodak 11a-D film was exposed with a yellow plexiglass filter. The...
Authors
Eugene Merle Shoemaker, Carolyn S. Shoemaker, E. F. Helin, S. J. Bus, R. F. Wolfe