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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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Loblolly-Shortleaf Pine: Assessment of air pollutant loadings in Stewart and Marion Counties and their relationship to Southern Pine Beetle Infestations Loblolly-Shortleaf Pine: Assessment of air pollutant loadings in Stewart and Marion Counties and their relationship to Southern Pine Beetle Infestations
No abstract available
Authors
Thomas G. Huntington
Offshore geology of Mauna Loa and adjacent areas, Hawaii Offshore geology of Mauna Loa and adjacent areas, Hawaii
No abstract available.
Authors
James G. Moore, William W Chadwick
Effects of fish density and relative abundance on competition between larval lake herring and lake whitefish for zooplankton Effects of fish density and relative abundance on competition between larval lake herring and lake whitefish for zooplankton
Competition for zooplankton between larval lake herring (Coregonus artedi) and lake whitefish (C. clupeaformis) was compared in mesocosm experiments in a small lake. Both species were combined in test enclosures at relative abundances of 1:1 or 1:4 lake herring to lake whitefish at densities of 500; 1, 000; and 2, 000 fish per cage, and were allowed to feed ad libitum on available...
Authors
Thomas N. Todd, Bruce M. Davis
The effects of temperature on sex determination in the bloater Coregonus hoyi: a hypothesis test The effects of temperature on sex determination in the bloater Coregonus hoyi: a hypothesis test
The hypothesis that temperature was an epigamic factor in bloater (Coregonus hoyi) sex determination in Lake Michigan was tested by rearing bloater larvae in the laboratory at 6, 11, and 15 degrees C for the first 80 days after hatching. The percentages of females of fish exposed to the three treatment temperatures did not differ significantly from the expected, 50%. Therefore, the null...
Authors
Gary W. Eck, Jeffrey D. Allen
Overview of the influence of syn-sedimentary tectonics and palaeo-fluvial systems on coal seam and sand body characteristics in the Westphalian C strata, Campine Basin, Belgium Overview of the influence of syn-sedimentary tectonics and palaeo-fluvial systems on coal seam and sand body characteristics in the Westphalian C strata, Campine Basin, Belgium
The Westphalian C strata found in the northeastern part of the former Belgian coal district (Campine Basin), which is part of an extensive northwest European paralic coal basin, are considered. The thickness and lateral continuity of the Westphalian C coal seams vary considerably stratigraphically and areally. Sedimentological facies analysis of borehole cores indicates that the...
Authors
Roland Dreesen, Dominique Bossiroy, Michiel Dusar, R. M. Flores, Paul Verkaeren
Plutonism at the interior margin of the Jurassic magmatic arc, Mojave Desert, California Plutonism at the interior margin of the Jurassic magmatic arc, Mojave Desert, California
The inland edge of the Jurassic magmatic belt passes through the eastern Mojave Desert, where it was emplaced in ancient continental crust. Three intrusive units exposed there—the Ship and Clipper Mountains plutons and a dike swarm in the Old Woman and Piute Mountains and Kilbeck Hills—are broadly similar to each other and to other intrusions of Jurassic age, but they differ from one...
Authors
Miquette E. Gerber, Calvin F. Miller, Joseph L. Wooden
Decline of northern pintails Decline of northern pintails
The size of the continental breeding population of northern pintail (Anas acuta) has greatly varied since 1955, with numbers in surveyed areas ranging from a high of 9.9 million to a low of 1.8 million in 1991. This variation results primarily from differences in the numbers of breeding pintails in the prairie region of Canada and the United States; these numbers ranged from 8.6 million...
Authors
Jay B. Hestback
Subduction cycles under western North America during the Mesozoic and Cenozoic eras Subduction cycles under western North America during the Mesozoic and Cenozoic eras
An extensive review of geologic and tectonic features of western North America suggests that the interaction of oceanic plates with the continent follows a broad cyclical pattern. In a typical cycle, periods of rapid subduction (7–15 cm/yr), andesitic volcanism, and trench-normal contraction are followed by a shift to trench-normal extension, the onset of voluminous silicic volcanism...
Authors
Peter L. Ward
Intrusive volcanic rocks in western Pacific forearcs Intrusive volcanic rocks in western Pacific forearcs
No abstract available.
Authors
Rex N. Taylor, Michael S. Marlow, Lynne E. Johnson, Brian Taylor, Sherman H. Bloomer, John G. Mitchell
Shorebirds: East of the 105th meridian Shorebirds: East of the 105th meridian
The North American group of shorebirds includes 48 kinds of sandpipers, plovers, and their allies, many of which live for most of the year in coastal marine habitats; other live principally in nonmarine habitats including grasslands, freshwater wetlands, and even second-growth woodlands. Most North American shorebirds are highly migratory, while others are weakly migratory, and even...
Authors
Brian A. Harrington
Canada geese in the Atlantic Flyway Canada geese in the Atlantic Flyway
Large changes have occurred in the geographic wintering distribution and subspecies composition of the Atlantic Flyway population of Canada geese (Branta canadensis) over the last 40 years. The Atlantic Flyway can be thought of as being partitioned into four regions: South, Chesapeake, mid-Atlantic, and New England. Wintering numbers have declined in the southern states (North Carolina...
Authors
Jay B. Hestbeck