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GeoRef Categories
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Availability
cement materials
Analcime-wairakite formation during experimental cement-bentonite alteration at 200–300 °C Open Access
High-resolution imaging of sedimentary bauxite deposits and structural controls on mineralization in western Guangxi Province based on efficient 3D TEM observation and inversion Available to Purchase
Comparing the short-term leaching behaviour of cements containing supplementary cementitious materials in different leachants for low-level waste encapsulation Open Access
Improvement of Fluidity and Long-term Strength of Cemented Paste Backfill with Low Calcium Fly-ash Available to Purchase
Social legacy and geoheritage significance of the largely overlooked Catahoula Volcanic Ash of South Texas Available to Purchase
Abstract The Oligocene–Miocene Catahoula Formation occurs along the length of the Gulf of Mexico coastal plain from the Rio Grande to the state of Mississippi. In Starr County, in South Texas, the formation is typified by the 20 m-thick Catahoula Volcanic Ash, interpreted to represent a single caldera eruption. The massive ash fall is the main source of the uranium that has been mined in South Texas since the late 1950s. It is also the origin of massive amounts of petrified wood, which was used in prehistory for making projectile points and continues to be used for landscaping. Diagenetic alteration of the volcanic ash produced the distinctive El Sauz Chert, which was used by native Americans for 10 000 years to make projectile points. More recently, the Catahoula Volcanic Ash was used as pozzolanic aggregate with Portland cement for the construction of Falcon Dam. The outcrop of the Catahoula Volcanic Ash in Starr County is the centrepiece of a geoheritage initiative, titled ‘ Ancient Landscapes of South Texas at the Nexus of Natural and Cultural History ’, whose goal is to connect the earth and social sciences to educate residents, students and visitors in how the region's geology has played a significant role in its social history.