Gobi, Geology

The Gobi's various chalky plains are chiefly Cenozoic in age (i.e., up to 66.4 million years old), though some of the low, isolated hills are older. The terrain contains small masses of shifting sands. In the central Gobi the remains of dinosaurs from the Mesozoic Era (245 to 66.4 million years ago) and fossils of Cenozoic mammals have been found. The desert also contains Paleolithic and