Anhdrite (fibrous) inclusions in Gypsum (Selenite), Liberty County, Texas
Unusual sample of Anhydrite fibers included in clear Selenite
Locality: Liberty County, Texas, Sample from the Moss Bluff Salt Dome
Anhydrite Chemical Formula: CaSO4
Gypsum (Selenite) Chemical Formula: CaSO4*2H20
Anhydrite Crystal System: Orthorhombic
Gypsum (Selenite) Crystal System: Monoclinic
Specimen size: 4 in long x 3 in across x 1.75 in deep
Specimen weight: 354 grams
On display in the Arthur E. Smith Collection, Wheaton College, Wheaton, Illinois.
Additional Information: The Moss Bluff Salt Dome in Liberty County (north of Houston) from which this specimen was acquired, is the site of a natural gas storage facility owned by Duke Energy Transmission, which made national news in August 2004 when nearly 6 billion cubic feet of natural gas escaped from the storage cavern 2500 feet below the surface, and burned for six days before it self-extinguished.