Physical Sciences and Mathematics Commons^™

The Crystal Structure Of Ceni, Joseph J. Finney

Earth and Planetary Sciences ETDs

X-ray diffraction methods were used to determine the cell constants and structure of CeNi. The unit cell is orthohombic. The spcae group is probably Cmcm with a_O=3.77 +/- 0.01, b_O=10.46 +/- 0.02, c_O=4.37+/- 0.01 A. The cell formula is Ce₄Ni_4. The observed density if 7.51 grams/cm³ and the calculated density is 7.65 grams/cm³, a deviation of 1.8%.

Stratigraphic Relationships Of Cretaceous And Early Tertiary Rocks Of A Part Of Northwestern San Juan Basin, Elmer H. Baltz Jr.

Earth and Planetary Sciences ETDs

No abstract provided.

Stratigraphic Analysis Of The Upper Cretaceous Pictured Cliffs Sandstone In Northeastern San Juan County, New Mexico, John W. Caldwell

Earth and Planetary Sciences ETDs

The San Juan Basin is located in northwestern New Mexico and southern Colorado and is physiographically a part of the Colorado Plateau province.

The Upper Cretaceous Pictured Cliffs sandstone is exposed around the perimeter of the San Juan Basin and is present throughout the greater part of the Basin in the subsurface. This economically important gas-bearing sandstone is situated in the structural basin in which the strata are upturned on the basinward flanks of the nearby Laramide cliffs.

Five possible origins for the Pictured Cliffs gas are presented: from the underlying Lewis shale, from within the Pictured Cliffs sandstone, from …

The Huego (Gym) Limestone, Luna County, New Mexico, Lowell E. Bogart

Earth and Planetary Sciences ETDs

Southwestern New Mexico is characterized by Basin and Range Physiography. Nearly level bolson plains are interrupted irregularly by linear mountain ranges. Sedimentary rocks ranging in age from Cambrian and recent crop out in the mountain areas. Darton (1916) mapped and described a limestone formation, about 1,000 feet thick, which he named Gym limestone. He thought the Gym was restricted in outcrop to Luna County and was distinct from previously described Paleozoic formations. The Gym was originally thought to be Pennsylvanian in age but later on was regarded as Permian. In the restudy of the Gym limestone was the basis of …

The Structural Geology Of The Cerrillos Hills Area, New Mexico, Alan E. Disbrow

Earth and Planetary Sciences ETDs

The earliest major structural deformation recorded in rocks exposed in the Cerrillos area occurred during the Laramie uplift of the Sangre de Cristo Mountains. This resulted in an erosional wedging of Upper Cretaceous strata at a rate of 130 feet per mile. Subsequent deposition of the Eocene Galisteo sand, clay, and gravel overstepped this surface in a sourceward direction.

At the beginning of work on this project the major problem was to determine the geological structure of the Cerrillos Hills. It was felt that a large-scale geologic map of an area extensive enough to reveal the structurally complex center of …

Geology Of The Mcrae Canyon Area Sierra County, New Mexico, Hugh P. Bushnell

Earth and Planetary Sciences ETDs

Sedimentary Rocks exposed at the surface in the low area between the north-trending Caballo and Fra Cristobal Mountains of south-central New Mexico include the late Cretaceous Mesaverde formation, the late Cretaceous and early Tertiary McRae formation, and the Miocene-Pliocene Santa Fe formation. A thin veneer of Jordana pediment gravel covers the older rocks on the eastern edge of the area.