Brewster County Consolidated Mine (Study Butte Mine; Rainbow Mine; Big Bend; Texas-Almaden), Study Butte, Terlingua District, Brewster Co., Texas, USA
|Latitude & Longitude (WGS84):||29° 19' 26'' North , 103° 31' 40'' West|
|Latitude & Longitude (decimal):||29.32389,-103.52778|
Ref.: Rocks & Min.:12:326,328; The Handbook of Texas online.
A mercury mine located at Study Butte (pronounced STOODY), 5 miles East of Terlingua.
Worked before 1940 until the late 1940's. Reopened 1970 - 1972 (Diamond Shamrock Corp.)
6 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Late Cretaceous - Early Cretaceous|
66 - 145 Ma
Age: Cretaceous (66 - 145 Ma)
Stratigraphic Name: Pen Formation
Comments: Equivalent to upper part of Austin Chalk. mostly clay, gray, yellow, calcareous, and sandstone beds in upper part. lower 50 ft contains inch-thick chalk beds, concretions throughout, marine fossils throughout, Exogyra ponderosa common; 219-700 ft thick in Big Bend N.P., 1,000 ft thick in Terlingua area, mapped in south Brewster County.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.