The Feldberg region was uplifted three times and then eroded again. These were formed from sedimentary rocks of sandstone, limestone, and shale in uplifted seabeds. The gorge also exposes uplifted and warped layers of basalt from the plateau. Block tectonics has uplifted or sunken crustal blocks. These metasedimentary rocks were later uplifted during the Alleghenian orogeny. This collision uplifted the Ouachita-Marathon fold belt and deformed the Tobosa Basin. In this way, large, flat areas of rock are uplifted to form a plateau. The Sangre de Cristo Mountains were uplifted during the Cenozoic Laramide orogeny. The devil is shown frontally, crouching with arms uplifted in a dynamic posture. The Black Hills area was uplifted as an elongated geologic dome. In total, the Colorado Plateau was uplifted an estimated . During Middle Silurian times, subsidence ceased and this basin was uplifted. Mountain belts are uplifted due to geologic processes. The subduction uplifted the region out of the sea and created a line of volcanoes. The area has been uplifted and lowered several times.