SDSU Geological Sciences - Thesis Defense - Marck Maroun

submitted by: tcarrasc
Saprock: A long term recorder of ground shaking, Peninsular Ranges, southern California Marck Maroun ABSTRACT Saprolization is commonly viewed as an isovolumetric process. However, it has not been studied extensively in seismogenic areas. Hence, we undertook a detailed study of five sites located at disparate distances to the seismically active Elsinore fault. Data obtained during this study along with the results of earlier investigation of five additional sites, support the idea of...

SDSU Geological Sciences - Thesis Defense - Robet Widodo

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Integrating Wells and 3D Seismic Data to Delineate the Sandstone Reservoir Distribution of the Talang Akar Formation, South Sumatra Basin, Indonesia Robet W. Widodo M.S. Candidate Department of Geological Sciences San Diego State University Advisor Dr. Gary Girty ABSTRACT This study describes the distribution and depositional environment of selected sandstone body reservoirs in the Oligocene-Miocene fluvial-deltaic Talang Akar Formation (TAF), Delta (DLT) area1, Jambi Sub-Basin,...

SDSU Geological Sciences - Thesis Defense - Nissa Morton

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Fault zone architecture of the San Jacinto fault zone in Horse Canyon, southern California: implications for focused fluid flow during rupture at shallow crustal levels Nissa Morton M.S. Candidate Advisor Dr. Gary Girty ABSTRACT Stream cuts in Horse Canyon southwest of Anza, CA have exposed the fault core, adjacent damage zone, and wall rocks of the San Jacinto fault at an approximate depth of 0.4 km. Here the juxtaposition of tonalitic plutons provides a unique opportunity to assess...

SDSU Geological Sciences - Thesis Defense - Rebbeca Tsang

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Toward Development of a Long Rupture History of the Northern Imperial Fault in Mesquite Basin, Imperial Valley, Southern California Rebecca Tsang M.S. Candidate Advisor Dr. Thomas Rockwell ABSTRACT The Imperial fault is a 70-km long, northwest-striking, dextral fault located in the Salton Trough, which along with the San Jacinto and Elsinore faults, are considered part of the San Andreas fault system and accommodate a significant proportion of the North American-Pacific plate-boundary...

SDSU Geological Sciences - Thesis Defense - Krista Muela

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Timing And Style Of Miocene Deformation, Indian Pass And Picacho State Recreation Area, SE California, U.S.A. Krista Muela Advisor Dr. Gary Girty ABSTRACT The Chocolate Mountains anticlinorium is a complex structure extending from the San Andreas fault on the west to south-central Arizona on the east. It is well exposed between Indian Pass and Picacho State Recreation Area, SE California, where Neogene rocks reveal a complex record of Paleogene to early Miocene extension followed by...

SDSU Geological Sciences - Thesis Defense - Nicholas Godinez

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Stratigraphy and petrologic evolution of the Oligocene-Miocene Comondú Group near Bahia Concepcion and Loreto, Baja California Sur, México Nicholas Godinez Advisor Dr. David Kimbrough ABSTRACT The Comondú Group of Baja California Sur, Mexico comprises extensive Oligocene to middle Miocene forearc basin and volcanic arc deposits that formed immediately prior to plate boundary reorganization and rifting that opened the Gulf of California. This study contributes new whole rock X-ray...

SDSU Geological Sciences - Thesis Defense - Esteban Bowles-Martinez

submitted by: tcarrasc
Geophysical imaging of the San Andreas Fault damage zone near Little Rock, California Esteban Bowles-Martinez Advisor Dr. Thomas Rockwell ABSTRACT New gravity, DC resistivity, and seismic refraction data image the damage zone surrounding the San Andreas Fault (SAF) near Little Rock, California. Analysis of these new data shows a decrease in electrical resistivity and seismic velocity in granitoids near the fault, which is interpreted as increased damage, with more damage on the...

SDSU Geological Sciences - Thesis Defense - Crystal Replogle

submitted by: tcarrasc
Weathering characteristics within the zone of precariously balanced rocks in Southern California: a probabilistic approach to analyzing corestone-saprock development Crystal Replogle Advisor Dr. Gary Girty ABSTRACT The development of dilatational volumetric strain in saprock from plutonic corestone near strike-slip faults, such as the Elsinore and San Jacinto faults in southern California, may be related to ground shaking during earthquakes. The saprock formation process has previously...

SDSU Geological Sciences - Thesis Defense - Tim Pelbath

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Using texture and geochemical data to assess the stratigraphic relationships between the Marcus Wash and Rojo Grande units, Picacho State Recreation Area, SE California Tim Pelbath Advisor Dr. Gary Girty ABSTRACT The Picacho State Recreation Area (PSRA), located in the lower Colorado River region SE California, contains a thick sequence of Tertiary volcanics. Based on published work, Miocene volcanic rocks have been subdivided, from lowest to highest, into the following 6 mappable...

SDSU Geological Sciences - Thesis Defense - Erik Gordon

submitted by: tcarrasc
Metamorphic Alteration of the Jurassic Metavolcanic Member, Winterhaven Formation, SE California; Implications for Classification and Interpreting Tectonic Setting Erik Gordon Advisor Dr. Gary Girty ABSTRACT The metavolcanic member of the Winterhaven Formation was erupted in an arc graben depression associated with extension during Jurassic subduction of the ancestral Pacific Plate beneath the California coastline. Analysis of 19 thin sections collected from the metavolcanic member...