Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

184898 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 3204, results 80076 - 80100

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
¿Cuales son las amenazas o peligros volcanicos?
Bobbie Myers, Steven R. Brantley, Peter Stauffer, James W. Hendley II
2000, Fact Sheet 144-00
Los volcanes son capaces de producir numerosos peligros geologicos e hidrologicos. Los cientificos del Servicio Geologico de los EE. UU. (USGS, por sus siglas en ingles) y de otras instituciones alrededor del mundo estan estudiando los peligros de muchos de los centenares de volcanes activos y potencialmente activos del mundo....
Water-level altitudes 2000 and water-level changes 1990-2000 and 1999-2000 in the Chicot and Evangeline aquifers, Fort Bend County and adjacent areas, Texas
L.S. Coplin, Horatio X. Santos
2000, Open-File Report 2000-93
This report is one in an annual series of reports that depicts water-level altitudes and water-level changes since 1990 in the Chicot and Evangeline aquifers in Fort Bend County and adjacent areas, Texas.  The report, prepared in cooperation with the Fort Bend Subsidence District, presents maps for the Chicot and...
Interagency field manual for the collection of water-quality data
2000, Open-File Report 2000-213
Along the United States-Mexico border region, numerous Federal, State, and local agencies; nongovernmental organizations (NGO); and researchers collect water-quality data for many purposes. The water community uses a number of documented and undocumented procedures, some of which have specific data-quality objectives (DQO) and data-information objectives. This mix of procedures results...
High flow and riparian vegetation along the San Miguel River, Colorado
Jonathan M. Friedman, G.T. Auble
2000, Report
Riparian ecosystems are characterized by abundance of water and frequent flow related disturbance. River regulation typically decreases peak flows, reducing the amount of disturbance and altering the vegetation. The San Miguel River is one of the last relatively unregulated rivers remaining in the Colorado River Watershed. One goal of major...
Cruise report RV Ocean Surveyor cruise O-1-00-GM the bathymetry and acoustic backscatter of the Pinnacles area, northern Gulf of Mexico May 23, through June 10, 2000 Venice, LA to Venice, LA
James V. Gardner, Kenneth J. Sulak, Peter Dartnell, Laurent Hellequin, Brian R. Calder, Larry A. Mayer
2000, Open-File Report 2000-350
An extensive deep (~100 m) reef tract occurs on the Mississippi-Alabama outer continental shelf (OCS). The tract, known as "The Pinnacles", is apparently part of a sequence of drowned reef complexes along the "40-fathom" shelf edge of the northern Gulf of Mexico (Ludwick and Walton, 1957). It is critical to...
What makes a healthy environment for native freshwater mussels?
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 124-00
Freshwater mussels are sensitive to contamination of sediment that they inhabit and to the water that they filter, making the presence of live, adult mussels an excellent indicator of ecosystem health and stability. Freshwater mussels are relatively immobile, imbedded in the streambed with part of the shell sticking up into...
Occurrence of organochlorine pesticides in streambed sediment and fish from selected streams on the island of Oahu, Hawaii, 1998
Anne M. D. Brasher, Stephen S. Anthony
2000, Fact Sheet 140-00
Organochlorine pesticides were heavily used from the mid-1940s to the mid-1980s. The persistence of organochlorine pesticides, their tendency to accumulate in soil, sediment, and biota, and their harmful effects on wildlife brought this class of compounds into disfavor and eventually resulted in restriction or cancellation of most of them in...
Age and paleoenvironmental significance of mega-invertebrates from the "San Pedro" Formation in the Coyote Hills, Fullerton and Buena Park, Orange County, Southern California
Charles L. Powell II, Dave Stevens
2000, Open-File Report 2000-319
The "San Pedro" Formation in the Coyote Hills contains an invertebrate fossil as-semblage of 184 taxa from 158 localities. The fauna consists of two annelids, 174 mollusks (80 bivalves, 94 gastropods, and three scaphopods), five arthropods, and three echinoids, along with other minor constituents recognized by not specifically identified during...
Pattern and process of land loss in the Mississippi Delta: A spatial and temporal analysis of wetland habitat change
John W. Day, Louis D. Britsch, Suzanne Hawes, Gary P. Shaffer, Denise J. Reed, Donald R. Cahoon
2000, Estuaries (56) 425-438
An earlier investigation (Turner 1997) concluded that most of the coastal wetland loss in Louisiana was caused by the effects of canal dredging, that loss was near zero in the absence of canals, and that land loss had decreased to near zero by the late 1990s. This analysis was based...
Fire in eastern ecosystems
Dale D. Wade, Brent L. Brock, Patrick H. Brose, James B. Grace, G. A. Hoch, William A. Patterson III
2000, General Technical Report RMRS-GTR-42-4
Prior to Euro-American settlement, fire was a ubiquitous force across most of the Eastern United States. Fire regimes spanned a time-scale from chronic to centuries. Fire severity varied from benign to extreme (fig. 1-2). Today, fire is still a major force on the landscape. In some ecosystems fire stabilizes succession at a particular sere,...