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.
Oklahoma Geography The Great Plains of North America slope east from the Rocky Mountains, extending south from Canada, through Oklahoma, and on into the northern regions of the State of Texas. For the most part, Oklahoma is a series of flat plains dissected by rolling hills, ridges and low mountains.