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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.
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.
Filter Total Items: 6152
The Mount Mazama climactic eruption (6900 BP) and resulting convulsive sedimentation on the continent, ocean basin, and Crater Lake caldera floor The Mount Mazama climactic eruption (6900 BP) and resulting convulsive sedimentation on the continent, ocean basin, and Crater Lake caldera floor
The climactic eruption of Mount Mazama and the resulting sedimentation may have been the most significant convulsive sedimentary event in North America during Holocene time. A collapse caldera 1,200 m deep and 10 km in diameter was formed in Mount Mazama, and its floor was covered by hundreds of meters of wall-collapse debris. Wind-blown pyroclastic ash extended 2,000 km northeast from...
Authors
C. Nelson, Paul Carlson, Charles Bacon
Historical changes in the major fish resources of the Great Lakes Historical changes in the major fish resources of the Great Lakes
My purpose here is to review historic changes in the major fish resources of the five Great Lakes, and to identify the cause or causes for those changes. In some instances it will be clear that intensive fishing was the primary cause of change; in other instances it will be nearly as clear that predation by the sea lamprey played a significant if not dominant role in change; and in still...
Authors
Wilbur Hartman
Responses of aquatic and streamside amphibians to timber harvest: a review Responses of aquatic and streamside amphibians to timber harvest: a review
Stream-dwelling amphibians, which can be the dominant vertebrates of small streams in forests of the Pacific Northwest, are prototypic riparian or ganisms. Larvae of several species are totally aquatic, while adults use the terrestrial streamside (riparian) habitat to varying degrees. Impacts of timber harvest vary among species, physical habitats, and regions of the Pacific Northwest
Authors
R. Bury, Paul Stephen Corn
Mineral resources of the U.S. Atlantic continental margin Mineral resources of the U.S. Atlantic continental margin
Most geologic materials may be usable resources in some form and at some time, whether it be for general land fill and aggregate, beach replenishment, construction material, or as a source of metals and fuels. Thus, most natural materials occurring within the Atlantic continental margin are resources, defined as “materials, including those only surmised to exist, that have present or...
Authors
Stanley R. Riggs, Frank Manheim
Trace contaminants in streams Trace contaminants in streams
No abstract available.
Authors
James Kuwabara, P. Helliker
The biogeochemistry of methanogenic bacteria The biogeochemistry of methanogenic bacteria
No abstract available.
Authors
Ronald Oremland
Use of "specific" inhibitors in biogeochemistry and microbial ecology Use of "specific" inhibitors in biogeochemistry and microbial ecology
The above statement, although meant to be tongue in cheek, contains an essential truism: all work with inhibitors is inherently suspect. This fact has been known by biochemists for some time. However, use of chemical inhibitors of enzymic systems and membranes continues to be a common approach taken toward unraveling the biochemistry and biophysics of plants, animals, and microorganisms...
Authors
Ronald Oremland, D.G. Capone
A history of human impacts on the Lake Erie fish community A history of human impacts on the Lake Erie fish community
The fisheries scientist working in the island region of Lake Erie has access to an extremely large and diverse freshwater fish community. It is the intention of this essay to discuss briefly that community and the impacts of human activities to provide future students and researchers with both current and historical information. Human settlements and development within the basin are...
Authors
Jeffrey Reutter, Wilbur Hartman
A protocol for institutional coordination in wildlife conservation A protocol for institutional coordination in wildlife conservation
No abstract available at this time
Authors
H. Salwasser, C. Schonewald-Cox, R. Baker
A review of depositional aspects and a guide to Paleocene coal-bearing sequences, Powder River Basin A review of depositional aspects and a guide to Paleocene coal-bearing sequences, Powder River Basin
No abstract available.
Authors
Romeo Flores, Peter Warwick, T.A. Moore
A review of the history, distribution, and foraging ecology of sea otters A review of the history, distribution, and foraging ecology of sea otters
No abstract available.
Authors
M. Riedman, J. Estes