Physical Sciences and Mathematics Commons^™

Hugo:The Hawaii Undersea Geo-Observatory, Fred K. Duennebier, David Harris, James Jolly, Jacqueline Caplan-Auerbach, Robert Jordan, Kurt Stiffel, Jeff Bosel

Geology Faculty Publications

The Hawaii Undersea Geo-Observatory, HUGO, was installed with the intent of supplying infrastructure for researchers interested in studies of undersea volcanism and associated phenomena at Loihi, the newest volcano of the Hawaiian chain. Much like an astronomical observatory, HUGO is a facility where scientists can perform experiments while sharing resources with others. The main components of HUGO are the shore station, supplying power to the observatory and recording data; the main cable-an electro-optical cable connecting the shore station to the summit of Loihi; the Junction box-the power distribution and data collection center on Loihi; multiplexing (mux) nodes-secondary distribution points; and …

Geologic Modeling Of Magnetic Data For Cypress Island, Washington, Ian Mynatt

WWU Honors College Senior Projects

Cypress Island, Washington is composed of three distinct rock units separated by two major faults with east-west trending surface traces. The rock units are from south to north; an ultramafic unit with varyingly serpentinized harzburgite, a volcanic/ sedimentary unit composed of basalt, numerous pelagic sediments and serpentine, and a greywacke unit. The orientations of the fault contacts at depth are not interpretable by surface data. This study compiled magnetic data from several sources to model subsurface geologic aspects of the island. Magnetic anomaly profiles were created from the data, then analyzed and modeled using the computer program GM-SYS. The primary …

A New Hypothesis For The Origin Of Dune Ridges, Neil Duffin

WWU Graduate School Collection

In support of a new hypothesis concerning the origin of dune ridges, fieldwork was carried out on the Long Beach Peninsula, SW Washington State, between 1997 and 2002. Procedures included coring, profiling, measuring and recording cross-section stratigraphy, and collected data analyzed and compiled at Western Washington University. The proposed hypothesis envisions coseismic subsidence, formation of a berm or beach ridge, subsequent uplift, and eolian deposition on the berm or beach ridge to form a new dune ridge. Geomorphic and stratigraphic evidence from the Long Beach Peninsula is presented and compared to the standard models outlined in the literature.

Most of …

Paleomagnetism Of The Jura-Cretaceous Kyuquot Group, Vancouver Island, British Columbia, Chad K. Hults

WWU Graduate School Collection

The Kyuquot Group is a series of marine clastic deposits of Late Jurassic to Early Cretaceous age located on the NW portion of Vancouver Island. These sediments have been folded, but not metamorphosed, and so provide an attractive target for paleomagnetic study. Results from these rocks fill a significant (50 m.y.) time gap in our knowledge of the paleomagnetic paleolatitude record of Wrangellia. Paleomagnetic results from the underlying Bonanza Volcanics (Symons, 1984) show no significant relative latitudinal displacement of Wrangellia with respect to North America. This, along with geological correlations between other similar-aged clastic sediment units, has led several workers …

Paleogeography Of The Spieden Group, San Juan Islands, Washington, Patricia Allison Dean

WWU Graduate School Collection

The Spieden Group in the San Juan Islands of Washington State consists of the Lower Cretaceous Sentinel Island Formation and the Upper Jurassic Spieden Bluff Formation. In order to constrain the location of its origin, paleomagnetism of the sedimentary rocks of the Spieden Group was studied to obtain paleolatitudes. Two components of magnetization were measured in most of the Sentinel Island Formation specimens. The second-removed component had a mean in-situ direction of D = 34.1°, I == 44. 2°, α₉₅ = 12.0° and a mean tilt-corrected direction of D = 49.3°, I = 71.5°, α₉₅ = 6.9°. Uncertainty …