Now showing items 1-10 of 217
Studies of sedimentary environments in the Cretaceous Dakota Sandstone in northwestern Colorado
The Cretaceous Dakota Sandstone is a land-derived, relatively unfossiliferous lithogenetic unit which occurs over a large part of the western interior of the United States and Canada. Its thickness over most of this area ...
Petrofabric analysis of experimentally deformed calcite-cemented sandstones
Cylinders of sand crystals, composed of single crystals of calcite that poikilitically enclose detrital grains, and calcite-cemented sandstones from the Tensleep (Pennsylvanian, Wyoming) and Supai (Permian, Nevada) formations ...
Productivity, preservation, and cyclic sedimentation within the Mowry Shale depositional sequence, Lower Cretaceous, western interior seaway
The late Albian Mowry Shale of Wyoming and Montana, and the time equivalent Big River Formation of Saskatchewan, were studied to determine the cause of anoxia within the Mowry Seaway and the presence or absence of small ...
Coastal lithosome evolution and preservation during an overall rising sea level: East Texas gulf coast and continental shelf
Present coastal systems along the east Texas coast evolved during the past 3.5 ky of relative sea-level stillstand following a rapid sea-level rise 4 ka. Closure of proto-Galveston Bay, caused by spit accretion of Galveston ...
Salt and slope tectonics offshore Louisiana
Various stages of mid-Jurassic salt deformation resulted in post-salt extensional and contractional systems on the continental slope offshore Louisiana. Pre-mid-Cretaceous salt deformation resulted in salt massifs, small ...
The geology of the Pahranagat Range, Lincoln County, Nevada: Part I. Introduction. Part II. Paleozoic and Cenozoic stratigraphy
This report defines and describes all exposed rock units in the Pahranagat Range, southeastern Nevada. The 600 square mile subject area, located in one of the most isolated regions of the United States, has not received ...