Lost Burro Formation

The Lost Burro Formation is a Middle to Upper/Late Devonian geologic formation in the Mojave Desert of California in the Western United States.

Lost Burro Formation
Stratigraphic range: Middle to Upper Devonian
Type	Geologic formation
Underlies	Tin Mountain Limestone
Overlies	Hidden Valley Dolomite
Lithology
Primary	Dolomite
Location
Coordinates	36.3443°N 116.5113°W / 36.3443; -116.5113
Region	Mojave Desert California
Country	United States
Type section
Named for	Lost Burro Gap
Named by	McAllister (1952)

Geology

The Dolomite formation is exposed in sections of the Darwin Hills, the Santa Rosa Hills, the Talc City Hills, the Inyo Mountains near the Cerro Gordo Mines, the Panamint Range near Towne Pass, and the Argus Range.^[1]

Fossils

Outcrops of the formation in Death Valley National Park have produced fossils of the placoderm Dunkleosteus terrelli, a small cladodont shark, the crushing tooth of a cochliodont, and the pteraspidid Blieckaspis priscillae.^[2][3]