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:: Geology of Nicaragua 11 Geology of Costa Rica 16 Geophysical Information 19 Studies of the Cocos Ridge

Paleo-oceanography of the subtropical southeastern Pacific during late Quaternary : a study of radiolaria, opal and quartz contents of deep-sea sediments

Creator:: Molina-Cruz, Adolfo
Abstract:: Micropaleontological data have been analyzed through mathematical and statistical procedures, in order to: (1) establish the distribution pattern of radiolarian assemblages in the surface sediments, (2) establish the relationship of these assemblages with oceanographic variables, (3) determine the faunal composition down-core with respect to the faunal surface pattern, and (4)...
Resource Type:: Masters Thesis
Full Text:: from the department of Marine Geology at OSIJ, thanks to Nicklas Pisias are not lacking here for his

Strontium isotopic and trace element geochemistry of the Saddle Mountains and Grande Rondé basalts of the Columbia River basalt group

Creator:: Nelson, Dennis O.
Resource Type:: Dissertation
Full Text:: OF Dennis 0. Nelson for the degree of Doctor of Philosophy in Geology presented on June 6, 1979

Gravity measurements and their structural implications for the continental margin of southern Peru

Creator:: Whitsett, Robert Manning
Abstract:: A free-air gravity anomaly map of the continental margin of Peru between 12° and 18° S. Lat. shows a -110 to -220 mgl anomaly associated with the Peru-Chile Trench, a -60 mgl anomaly over the Pisco Basin on the continental shelf, and -120 mgl anomaly over the Mollendo (or Arequipa)...
Resource Type:: Dissertation
Full Text:: ). The Generalized Geology Map of Peru (Anonymous, 1969) is the first pub- lication known to the author

The crustal structure and tectonic framework of the Gulf of Panama

Creator:: Briceno-Guarupe, Luis Alberto
Abstract:: Gravity and magnetic data from cruises by the R/V Yaquina in 1973 and the R/V Wecoma in 1975 provide new data that make possible the construction of a map of the free-air gravity anomalies at sea and simple Bouguer anomalies on lano in Panama, western Colombia, and the eastern Panama...
Resource Type:: Masters Thesis
Full Text:: to explain the tectonics and geology of the area. The Crustal Structure and Tectonic Framework of

Seismic ray trace techniques applied to the determination of crustal structures across the Peru continental margin and Nazca plate at 9 ̊S. latitude

Creator:: Jones, Paul Roy III
Abstract:: Seismic refraction, reflection and gravity data obtained across the Peru continental margin and Nazca Plate at 9° S. permit a detailed determination of crustal structure. Complex structures normal to the profile require the development of a ray trace technique to analyze first and later arrivals for eleven overlapping refraction lines....
Resource Type:: Dissertation
Full Text:: studies of the geology and geophysics of the Peru-Chile continental margin, trench and Nazca Plate (Kuhn

Cruise report WELOC cruise '77, leg 6, R/V WECOMA, May 21 - June 18, 1977

Creator:: Oregon State University. School of Oceanography
Abstract:: The R/V WECOMA cruise leg 6 emphasized the field work of the marine geology research program on "Patterns and processes of continental margin sedimentation." This program constitutes a mesoscale study of processes controlling hemipelagic sediment distribution and composition beneath the coastal upwelling, non-upwelling and pelagic regimes of the equatorial East...
Resource Type:: Technical Report
Full Text:: ) The R/V WECOMA cruise leg 6 emphasized the field work of the marine geology research program on

Morphology, shallow structure, and evolution of the Peruvian continental margin, 6⁰ to 18⁰ S

Creator:: Masias Echegaray, Juan Antonio
Abstract:: Detailed bathymetric survey data were collected along the Peruvian continental margin and were compiled by the author and other investigators to construct a new bathymetric map for the area between 6° to 18°S latitude. Based on this map and individual bathymetric profiles, the continental shelf topography is essentially flat. Four...
Resource Type:: Masters Thesis
Full Text:: contributed to the knowledge of the geology of Peru. According to the plate tectonic hypothesis, the Andean

Deformation in the Peru Trench, 6⁰-10⁰S

Creator:: Prince, Roger Allan
Abstract:: Detailed surveys of several segments of the Peru Trench show that the region between 6° to 10⁰ S is an area of recent deformation. Seismic reflection records across the axis of the trench show faulting, uplift, and tilting of the sedimentary fill and the acoustic basement. Uplift of the acoustic...
Resource Type:: Masters Thesis
Full Text:: CONTENTS Page INTRODUCTION 1 REGIONAL GEOLOGY, STRUCTURE, AND SEISMICITY 5 BATHYME TRY AND MORPHOLOGY

Chile trench : extensional rupture of oceanic crust and the influence of tectonics on sediment distribution

Creator:: Schweller, W. J. (William John)
Abstract:: Extensive new trackline coverage of the Chile Trench between 23°S and 34°S, including more than 60 bathymetric and seismic reflection profiles across the trench axis, allows a much more detailed study of the tectonics and sedimentation of this feature than previously possible. Sediment distribution along the axis shows a remarkable...
Resource Type:: Masters Thesis
Full Text:: oriented with east to the right and west to the left. 11 ONSHORE SETTING Physiography and geology have

ScholarsArchive@OSU

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

Paleo-oceanography of the subtropical southeastern Pacific during late Quaternary : a study of radiolaria, opal and quartz contents of deep-sea sediments

Strontium isotopic and trace element geochemistry of the Saddle Mountains and Grande Rondé basalts of the Columbia River basalt group

Gravity measurements and their structural implications for the continental margin of southern Peru

The crustal structure and tectonic framework of the Gulf of Panama

Seismic ray trace techniques applied to the determination of crustal structures across the Peru continental margin and Nazca plate at 9 ̊S. latitude

Cruise report WELOC cruise '77, leg 6, R/V WECOMA, May 21 - June 18, 1977

Morphology, shallow structure, and evolution of the Peruvian continental margin, 6⁰ to 18⁰ S

Deformation in the Peru Trench, 6⁰-10⁰S

Chile trench : extensional rupture of oceanic crust and the influence of tectonics on sediment distribution

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