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Epithermal vein and carbonate replacement mineralization related to caldera development, Cunningham Gulch, Silverton, Colorado
Epithermal vein and carbonate replacement deposits in Cunningham Gulch are located within the western San Juan Tertiary volcanic field in southwestern Colorado. The Pride of the West epithermal vein system is hosted ...
The role of bacteria in the deposition and early diagenesis of the Posidonienschiefer, a Jurassic oil shale in southern Germany
The Jurassic (Toarcian) Posidonienschiefer of southern Germany is famous for its well preserved vertebrate fossils and its high organic content. The majority of the Posidonienschiefer (10 meters thick in the study area) ...
The public lending right : United States prospects
Low-temperature geothermal ground water in the Hosston/Cotton Valley hydrogeologic unit, Falls County area, Texas
In the Falls County study area in east-central Texas, the Cotton Valley/Schuler Member and the overlying Hosston Sand (Late Jurassic to Early Cretaceous?) act as a single hydrogeologic unit (aquifer) that contains ...
Environmental geology of abandoned lignitic- and bituminous-coal mines of Texas
Lignitic, canneloid, and bituminous coals have been mined in Texas since at least the early 1800's and possibly the 1750's. Inactive mining districts are located in most regions of the state and mining continues in several ...
Origin of olivine-plagioclase coronal textures from the Adirondack Mountains, New York State
Olivine-plagioclase coronas in metagabbros from the Adirondack Mountains are spatially well-organized reaction textures consisting most commonly of sequential layers of orthopyroxene, clinopyroxene, [plus or minus] ...
Structural evolution of the Warwick Hills, Marathon Basin, West Texas
A detailed structural analysis was conducted of the Warwick Hills at the northeast tip of the doubly-plunging Dagger Flat anticlinorium, Marathon Basin, west Texas. Field work delineated a folded duplex structure composed ...
Seismic structural analysis of deformation in the southern Mexican Ridges
The southernmost region of the Mexican Ridges extends from Bryant's gap near 22.5 N latitude to the Campeche Knolls near 19.0 N latitude. Analysis of 23,030 kilometers of sparker and CDP seismic data from six surveys reveals ...
Temperature variations and their relation to groundwater flow, South Texas, Gulf Coast Basin
Isothermal surfaces and temperature gradients confirm the presence of anomalously high geothermal gradients along the Wilcox growth fault zone in South Texas. This anomaly has been attributed to the advection of heat via ...