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Full-Text Articles in Physical Sciences and Mathematics
Geology And Ground-Water Resources Of Northern Lea County, New Mexico, Sidney R. Ash
Geology And Ground-Water Resources Of Northern Lea County, New Mexico, Sidney R. Ash
Earth and Planetary Sciences ETDs
The economy of northern Lea County is dependent upon groundwater; the only other source of water is the runoff from precipitation that is caught and retained in the man-made or natural reservoirs, where is it used for water stock. Irrigation utilizes most of the groundwater pumped; much smaller amounts are used for stock watering and industrial, public, rural and domestic supplies. In 1958, about 107,000 acre-feet of groundwater was pumped for irrigation and 19,000 acre-feet was pumped for all other uses. On the basis of present production of potable water, the economically usable supply will be depleted in certain areas …
The Structure And Stratigraphy Of The Frontier Formation In The Big Piney-La Barge Area Sublette And Lincoln Counties, Wyoming, Eldred D. Johnson
The Structure And Stratigraphy Of The Frontier Formation In The Big Piney-La Barge Area Sublette And Lincoln Counties, Wyoming, Eldred D. Johnson
Earth and Planetary Sciences ETDs
This study was undertaken to fulfill part of the requirements for the degree of Master in Science of Geology. The Big Piney-LA Barge area in western Wyoming covers approximately 354 square miles on the western edge of the Green River Basin and the eastern edge of the over thrust belt. The area is underlain by a sedimentary sequence containing rocks representing all the geologic time periods form the Cambrian through the Cenozoic, with the exception of the Silurian period. The entire known post-Precambrian strati-graphic sequence is approximately 18,00 feet thick.
A Petrographic And Environmental Study Of The Upper Cretaceous Greenhorn Limestone, New Mexico, John W. Emerson
A Petrographic And Environmental Study Of The Upper Cretaceous Greenhorn Limestone, New Mexico, John W. Emerson
Earth and Planetary Sciences ETDs
The Upper Cretaceous Greenhorn Limestone is composed of intercalated agrillaceous limestone and calcareous shale beds which crop out over much of the Western Interior. The Greenhorn was deposited in late Cenomanian and early Turonian time in a westward transgressing sea. In New Mexico the age is early Turonian. The edge of deposition extends as far south as Capitan and Carthage, northward through western Bernalillio County, and northwest through Toadlena.
Lithogenesis Of Atoll Sediments, Uliga Island, Majuro Atoll, Marshall Islands, Phyllis B. Helms
Lithogenesis Of Atoll Sediments, Uliga Island, Majuro Atoll, Marshall Islands, Phyllis B. Helms
Earth and Planetary Sciences ETDs
Sixteen thin sections and 53 samples of rock and sand were examined under petrographic and binocular microscopes to determine composition, kinds of cement, degrees of cementation, and the sequence of lithogenesis of the consolidated materials. Studies were made of the loose sediments to relate the characteristics of the sedimentary grains to environmental energy of today, and then collate these data with the lithified sediments.
Geology Of The Nutria Monocline, Mckinley County, New Mexico, R. John Edmonds
Geology Of The Nutria Monocline, Mckinley County, New Mexico, R. John Edmonds
Earth and Planetary Sciences ETDs
The Nutria monocline forms the northwestern boundary of the Zuni uplift in McKinley County, New Mexico. The sedimentary rocks that are exposed along the monocline range in age from Permian to Cretaceous and rest on Granite of probable Precambrian age. The Jurassic Todilto limestone, which is present north of the mapped area, pinches out in a southerly direction. South of this pinch-out the massive sandstone of the Entrada formation joins the main body of the Zuni sandstone. Only the even bedded, silty sandstone that has previously been considered to be the middle member of the Entrada is regarded as Entrada …