U.S. Department of the Interior. The Department of the Interior manages public lands and minerals, national parks, and wildlife refuges and upholds Federal trust responsibilities to Indian tribes and Native Alaskans. Additionally, Interior is responsible for endangered species conservation and other environmental conservation efforts.
Acquired November 13, 2002, this false-color image shows part of the Ouachita Mountains in southeastern Oklahoma. Acquired November 13, 2002, this false-color image shows part of the Ouachita Mountains in southeastern Oklahoma.
contour lines, or lines of equal elevation above sea level. The high-. est elevation (4,973 ft) in Oklahoma is on Black Mesa, in the north -. west corner of the Panhandle; the lowest elevation (287 ft) is where. Little River flows into Arkansas, near the southeast corner of the. State.