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Protection of fish spawning habitat for the conservation of warm temperate reef fish fisheries of shelf-edge reefs of Florida Protection of fish spawning habitat for the conservation of warm temperate reef fish fisheries of shelf-edge reefs of Florida

We mapped and briefly describe the surficial geology of selected examples of shelf-edge reefs (50–120 m deep) of the southeastern United States, which are apparently derived from ancient Pleistocene shorelines and are intermittently distributed throughout the region. These reefs are ecologically significant because they support a diverse array of fish and invertebrate species, and they...
Authors
Christopher C. Koenig, Felicia C. Coleman, Churchill B. Grimes, Gary R. Fitzhugh, Kathryn M. Scanlon, Christopher T. Gledhill, Mark Grace

Detecting change in water quality from implementation of limestone treatment systems in a coal-minded watershed Detecting change in water quality from implementation of limestone treatment systems in a coal-minded watershed

During 1996-97, a variety of limestone-based treatment systems were implemented to neutralize acidic mine drainage and reduce the transport of dissolved metals in the northern part of the Swatara Creek watershed, which drains a 43-mi2 (112-km2) area in the Southern Anthracite Field upstream from Ravine, Pa. Since 1996, the current project has monitored water quality upstream and...
Authors
Charles A. Cravotta, Jeffrey B. Weitzel

Relations among sulfate, metals, sediment, and streamflow data for a stream draining a coal-mined watershed in East-Central Pennsylvania Relations among sulfate, metals, sediment, and streamflow data for a stream draining a coal-mined watershed in East-Central Pennsylvania

Streamflow and water-quality data for the northern part of Swatara Creek, which drains a 112-km2 area in the Southern Anthracite Field of east-central Pennsylvania, indicate iron, copper, and lead, and to a lesser extent manganese and zinc, are transported with suspended particles during stormflow conditions. During stormflow conditions, concentrations of these constituents typically...
Authors
Charles A. Cravotta

Louisiana coastal wetlands: a resource at risk Louisiana coastal wetlands: a resource at risk

Approximately half the Nation's original wetland habitats have been lost over the past 200 years. In part, this has been a result of natural evolutionary processes, but human activities, such as dredging wetlands for canals or draining and filling for agriculture, grazing, or development, share a large part of the responsibility for marsh habitat alteration and destruction. Louisiana's...
Authors
S. Jeffress Williams

Obtaining Streamflow Statistics for Massachusetts Streams on the World Wide Web Obtaining Streamflow Statistics for Massachusetts Streams on the World Wide Web

A World Wide Web application has been developed to make it easy to obtain streamflow statistics for user-selected locations on Massachusetts streams. The Web application, named STREAMSTATS (available at http://water.usgs.gov/osw/streamstats/massachusetts.html ), can provide peak-flow frequency, low-flow frequency, and flow-duration statistics for most streams in Massachusetts. These...
Authors
Kernell G. Ries, Peter A. Steeves, Aleda Freeman, Raj Singh

Urban seismic experiments investigate Seattle fault and basin Urban seismic experiments investigate Seattle fault and basin

In the past decade, Earth scientists have recognized the seismic hazards that crustal faults and sedimentary basins pose to Seattle, Washington (Figure 1). In 1998, the US. Geological Survey and its collaborators initiated a series of urban seismic studies of the upper crust to better map seismogenic structures and sedimentary basins in the Puget Lowland. These studies are called the...
Authors
Thomas M. Brocher, Thomas L. Pratt, Ken C. Creager, Robert S. Crosson, William P. Steele, Craig S. Weaver, Arthur D. Frankel, Anne Trohu, Catherine M. Snelson, Kate C. Miller, Steven H. Harder, Uri S. ten Brink

Mineral-Resource Databases Mineral-Resource Databases

No abstract available.
Authors
Bruce R. Lipin
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