SDSU Geological Sciences - Thesis Defense - Krista Muela

submitted by: tcarrasc
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

submitted by: tcarrasc
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...

Collaborative studies on tropical Asian dendrochronology: Addressing challenges in climatology and forest ecology

submitted by: UP Los Baños
A report on the Asia Pacific Network Global Change Research-funded project aimed to (1) establish tree ring laboratories in the region, (2) conduct reconnaissance of indigenous tropical Asian tree species with clear distinct growth rings, (3) conduct preliminary work to find if tree species with distinct growth rings have relevance to reconstructing past events, and (4) to establish and maintain a xylaria. DR. NESTOR T. BAGUINON Department of Forest Biological Sciences College of...

SDSU Geological Sciences - Thesis Defense - Carrie Welker

submitted by: tcarrasc
No evidence for seawater-derived crustal contamination at Loihi Seamount from trace metal abundances and oxygen isotope ratios Carrie Welker Advisor Dr. Aaron Pietruszka ABSTRACT Loihi Seamount is the youngest Hawaiian volcano. It towers ~3 km above the seafloor to within ~1 km of sea level. A previous study found elevated (234U/238U) ratios in sixteen Loihi volcanic glass samples. The expected value of (234U/238U) in primary magmas derived from the mantle is 1.000, but seawater's...