Index Catalog // ScholarsArchive@OSU

Structures of the continental margin of Central America from northern Nicaragua to northern Panama

Creator:: Victor, Linda
Abstract:: Gravity and seismic data obtained by the geophysical group at Oregon State University on the R/V YAQUINA during 1969, 1971, and 1973 plus other available data over the area just west of Nicaragua and Costa Rica indicate the tectonic complexity of the region. Gravity measurements show negative free-air anomalies over...
Resource Type:: Masters Thesis
Full Text:: . Geographic and structural province map of Nicaragua and Costa Rica (land geology after McBirney and Williams

Crustal structure of the Tehuantepec Ridge and adjacent continental margins of southwestern Mexico and western Guatemala

Creator:: Woodcock, Stephen Frederick
Abstract:: A free-air gravity anomaly map of the area between 10°-17°N and 90°-101°W shows distinctive positive and negative anomalies which parallel the Tehuatepec Ridge. The positive anomaly approximately overlies the topographic expression of the ridge. On the wide continental shelf southeast of the Gulf of Tehuantepec a positive gravity anomaly with...
Resource Type:: Masters Thesis
Full Text:: range, Surface geology indicates the exposed rocks are primarily Quaternary continental sediments (King

Magnetic and gravity interpretation of Yaloc-69 data from the Cocos plate area

Creator:: Lu, Richard Shih-Ming
Abstract:: Magnetic, gravity and bathymetry data were collected on an extended cruise of the R/V Yaquina in 1969. The last set of data was obtained from those track lines leaving the Panama Basin. The area covered is mainly the Cocos plate (Molnar and Sykes, 1969). The data is analyzed and compared...
Resource Type:: Masters Thesis
Full Text:: , and continental drift is still undecided. Descriptions of Cocos Plate and Regional Marine Geology Le

The case for NE-SW extension in northeast Oregon

Creator:: Essman, Jim E.
Abstract:: A zone of diffuse deformation -600 km-wide extending from northern California to Washington has developed resulting from the oblique subduction of the Juan de Fuca plate beneath North America, and the northwestward migration of the Pacific plate. This zone is marked by a change in structural style from transtension in...
Resource Type:: Masters Thesis

Himalayan deformation and metamorphism of rocks south of the Main Mantle Thrust, Karakar Pass area, southern Swat, Pakistan

Creator:: Palmer-Rosenberg, Paul S.
Abstract:: Rocks south of the Main Mantle Thrust (MMT) in Swat, Pakistan consist predominantly of Precambrian to Paleozoic granitic gneisses and metasedimentary rocks that represent the deformed and metamorphosed northern margin of the Indian subcontinent. In the Karakar Pass area the rocks are divisible into three lithologic units: the Swat granite...
Resource Type:: Masters Thesis

Stratigraphy and structure of Dixon Mountain-Little Water Canyon area Beaverhead County, Montana

Creator:: Klecker, Richard Alan
Abstract:: Approximately 23 square miles of the east-central part of the Tendoy Range are included in the thesis area which lies three miles west of Dell, Montana. Rocks ranging in age from Late Mississippian to Recent are exposed in the study area. The upper Paleozoic section includes approximately 4,200 feet (1,281...
Resource Type:: Masters Thesis

Superposed compressional and extensional strain in Lower Paleozic rocks of the northwestern Grant Range, Nevada

Creator:: Camilleri, Phyllis A.
Abstract:: The Grant Range, in east-central Nevada, is a north-east trending range bounded on the west by a west-dipping normal fault system. Rocks within the range record a complex polyphase Mesozoic ductile compressional and Cenozoic brittle extensional deformational history. The northwestern Grant Range exposes deformed, regionally metamorphosed and unmetamorphosed, Cambrian to...
Resource Type:: Masters Thesis

Structural interpretation of the eastern Sulaiman foldbelt and foredeep, Pakistan

Creator:: Humayon, Mansoor
Abstract:: The Sulaiman foldbelt is an active and conspicuous tectonic feature on the northwestern margin of the Indo-Pakistani plate. Seismic reflection data have been combined with surface geological mapping and drillhole data to interpret the structural style and tectonic shortening of the eastern Sulaiman foldbelt and its adjacent foredeep. The data...
Resource Type:: Masters Thesis
Full Text:: Science in Geology presented on March. 13. 1990. Title: Structural Interpretation of the Eastern

Subsurface structural evolution along the northern Whittier fault zone of the eastern Los Angeles basin, Southern California

Creator:: Herzog, David W.
Abstract:: The Whittier fault forms the central part of a fault system extending from the East Montebello fault at Whittier Narrows to the Elsinore fault, which is traced as far as the Mexican border. The Whittier fault forms a restraining bend in this fault system, resulting in uplift of the Puente...
Resource Type:: Masters Thesis

P and S velocity structure beneath the Gulf of Maine

Creator:: Sattel, Daniel
Abstract:: Seismic refraction data collected in 1985 by the USGS were used in this study to derive the P and S velocity structure of the crust beneath the Gulf of Maine. The data quality differs among instruments and is affected by surficial lateral heterogeneities, a ringy source signature and reverberations. Velocity...
Resource Type:: Masters Thesis
Full Text:: velocities parallel to the structural grain of the Appalachians of 6.1-6.4 km/s and velocities transverse to

ScholarsArchive@OSU

Structures of the continental margin of Central America from northern Nicaragua to northern Panama

Crustal structure of the Tehuantepec Ridge and adjacent continental margins of southwestern Mexico and western Guatemala

Magnetic and gravity interpretation of Yaloc-69 data from the Cocos plate area

The case for NE-SW extension in northeast Oregon

Himalayan deformation and metamorphism of rocks south of the Main Mantle Thrust, Karakar Pass area, southern Swat, Pakistan

Stratigraphy and structure of Dixon Mountain-Little Water Canyon area Beaverhead County, Montana

Superposed compressional and extensional strain in Lower Paleozic rocks of the northwestern Grant Range, Nevada

Structural interpretation of the eastern Sulaiman foldbelt and foredeep, Pakistan

Subsurface structural evolution along the northern Whittier fault zone of the eastern Los Angeles basin, Southern California

P and S velocity structure beneath the Gulf of Maine

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