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Full-Text Articles in Physical Sciences and Mathematics
Geology And Ground-Water Resources Of The Portales Valley Area, Roosevelt And Curry Counties, New Mexico, Sherman E. Galloway
Geology And Ground-Water Resources Of The Portales Valley Area, Roosevelt And Curry Counties, New Mexico, Sherman E. Galloway
Earth and Planetary Sciences ETDs
Since 1910, and particularly since the closing years of World War II, considerable development of the ground water occurring in the valley fill has been made for irrigation purposes. This increase in development has resulted in a progressive decline of the water levels in this area. The results of this study indicate that the water occurring in the valley fill is the only water of good chemical quality occurring in the Portales Valley that can be obtained in quantities that are sufficient for normal irrigation, municipal, industrial, stock, and domestic uses, and that if the present rate of ground water …
Paleozoic Stratigraphy Of The Mud Springs Mountains, Sierra County, New Mexico, John Davis Hill
Paleozoic Stratigraphy Of The Mud Springs Mountains, Sierra County, New Mexico, John Davis Hill
Earth and Planetary Sciences ETDs
This thesis gives a history of the terminology of each of the formations found in the Mud Springs Mountains as well as a discussion of the characteristics of each. The Mud Springs Mountains Section of Paleozoic rocks is 3660 feet thick. Parts of all the Paleozoic systems are represented except the Silurian and Mississippian. The Bliss sandstone is 145 feet thick, the lower 65 feet being late Cambrian and the upper 80 feet being early Ordovician. The El Paso limestone of early Ordovician age is 460 feet thick.
The Instability Of Folded Structures, Robert Del Mar
The Instability Of Folded Structures, Robert Del Mar
Earth and Planetary Sciences ETDs
Folded structures are not necessarily stable through geologic time. "Unfolding" is defined as the changes in attitude through with folded structures go subsequent to their creation by tectonic means, other than by faulting alone. The principal types of unfolding, together with their causes, are: (1) the effect of gravity on isolated structures, and the effects of loading and unloading insofar as the gravitational force is concerned; (2) basining action and its effect on unloading; (3) the action of vertical forces on folded structures; (4) migrating or "wave" folds in relation to unfolding.