Thomas E. Mullens 1973 <p>A pyrite-bearing latite porphyry that contains fragments&nbsp;of syenite and a quartz porphyry intruded into the Cretaceous Cox&nbsp;Sandstone are well exposed in a roadcut at Texan Mountain, Hudspeth&nbsp;County, Tex. The pyrite, which occurs along tiny fractures as well as&nbsp;disseminated, and the multiple episodes of intrusion, coupled with&nbsp;copper minerals in veins in the overlying Cox Sandstone, indicate a&nbsp;slight potential for porphyry-type copper or molybdenum deposits at&nbsp;depth.</p> application/pdf en U.S. Geological Survey Disseminated pyrite in a latite porphyry at Texan Mountain, Hudspeth County, Texas article