Recent structural studies have confirmed or established the following facts regarding the tectonics of the Beartooth-Bighorn region: 1) the Big Horn Basin is featured by peripheral folds (characteristically asymmetrical), apparently due to differential movement on basement faults; 2) the Pryor Mountains consist of four crustal blocks, each uplifted at the northeast corner, and bounded on the north and east by faults merging into monoclines; 3) there are local overthrusts on both the eastern and western sides of the Bighorns; 4) there is southward overthrusting south of the Wind River Canyon; and 5) there are eastward, northward (and southward), and southwestward thrusts around the Beartooth Range.