The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
The U.S. Geological Survey (USGS) was established by the Organic Act of March 3, 1879 (43 U.S.C. 31). USGS classifies public lands, examines the geological structure, and assesses the energy, mineral, water, and biology resources and products within and outside the national domain.
USGS provides relevant, objective scientific studies and information used to help address issues and solve problems dealing with natural resources, natural hazards, and the environmental effects on human and wildlife health.