The United States Geological Survey (USGS) is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it.
The organization has four major science disciplines, concerning biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The USGS employs approximately 8,600 people and is headquartered in Reston, Virginia, USA. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California.
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