The Atlantic Richfield Fort Stockton sulfur mine is in north-central Pecos County in the Permian basin of West Texas. Sulfur first was noted at the site in 1900. The first sulfur test was drilled in 1966 and sulfur production started in 1968. Eighty-seven exploratory and production holes have been drilled to date by the operator.

The mine is on the crest of a local culmination on a regional anticline at the Delaware basin edge of the Central Basin platform. The sulfur is produced from a porous limestone facies in the predominantly evaporitic Salado Formation of Late Permian age. The limestone, which is considered to be epigenetic and of biogenetic origin, varies from a featheredge to 460 ft thick and is subdivided into three zones. Sulfur occurs in vug, fracture, and fenestral porosity. The sulfur is present in a gross interval up to 420 ft thick and has a thickness of up to 90 net ft of sulfur. Standard Frasch mining procedures are used.