| |
| | Geological Survey, United States on Encyclopedia.com (Site not responding. Last check: 2007-10-21) |
 | | GEOLOGICAL SURVEY, UNITED STATES [Geological Survey, United States] bureau organized in 1879 under the Dept. of the Interior to unify and centralize the work already undertaken by separate surveys under Clarence King, F. Hayden, George W. Wheeler, and J. Powell. |
 | | This US Geological Survey(USGS) handout image obtained 15 December, 2005 shows steam venting from the dome in the crater of the Mount St. Helen's volcano in Washington state on 11 December. |
 | | This photograph providec by the US Geological Survey shows a plume of ash rising from Augustine Volcano 12 January 2006 on a desolate island in Cook Inlet, which lies about 288 kilometers (180 miles) southwest of Anchorage, Alaska. |
| www.encyclopedia.com /html/G/Geologic.asp (864 words) |
|