Lead Camp Limestone
The Lead Camp Limestone is a geologic formation in the San Andres Mountains of New Mexico. It preserves fossils dating back to the middle Pennsylvanian.
Description
The Lead Camp Limestone consists of 75% medium- to dark-gray cherty limestone and 21-24% calcareous shale. The base of the formation contains minor sandstone and conglomerate. The limestone forms prominent cliffs capping the southern San Andres Mountains. The total thickness is. The formation rests unconformably on the Lake Valley Limestone to the south and conformably on the Sandia Formation to the north.Deposition began in the late Morrowan to the south, spread to the north in the Atokan Age.