دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the geologic principle that the processes that are at work today on the earth are the same as, or very similar to, the processes that affected the earth in the past. The principle was formulated in 1785 by James Hutton, a Scottish geologist. It became an accepted doctrine with the publication in 1830 of English geologist Charles Lyells book Principles of Geology. Also called gradualism. Compare catastrophism. spills, coordinates individual and state efforts to rescue and rehabilitate oiled birds, and administers federal aid programs. Address: MS 634 Arlington Square, 1849 C Street NW;Washington, DC 20240;(703) 358- 1714. United States Geological Survey (USGS)

n: (USGS) a federal agency within the Department of the Interior established in 1879 to conduct investigations of the geological structure, mineral resources, and products of the United States. Its activities include assessing onshore and offshore mineral resources;providing information that allows society to mitigate the impact of floods, earthquakes, landslides, volcanoes, and droughts;monitoring the nations groundwater and surface water supplies and peoples impact thereon;and providing mapped information on the nations landscape and land use. Address: 12201 Sunrise Valley Drive;Reston, VA 20192;(703) 648-4000.

abbr: United States Geological Survey.

United States Geololgical Survey, a US government agency.