Index Catalog // ScholarsArchive@OSU

Creator:: Haxel, Joseph H.
Abstract:: Passive hydrophone technologies and a variety of acoustic methods are applied in the deep-ocean and shallow water coastal environments of the northeast Pacific. A catalog derived from U.S. Navy regional hydrophone array recordings of acoustic T- phases from seafloor earthquakes is examined, describing space/time patterns through empirical orthogonal function analysis...
Resource Type:: Dissertation
Full Text:: Axial Seamount on the Juan de Fuca ridge provides an acoustic record of building microseismicity

Creator:: Sapkota, Birat
Abstract:: The Juan de Fuca plate system is what remains of Farallon plate subducting under the continental North American plate. Blanco Transform Fault Zone (BTFZ) consists of a network of strike-slip faults discontinued by pull apart depressions which o↵sets the Juan de Fuca Ridge and the Gorda Ridge. Detailed analysis of...
Resource Type:: Masters Thesis
Full Text:: whereas Juan de Fuca ridge and Gorda ridge separate this fault from Pacific plate on the west. These two

Creator:: Appelgate, T. Bruce
Abstract:: A 5km swath-width SeaMARC I sidescan sonar survey, conducted over the zone of overlap between the southern rift zone of Axial Volcano and the northern tip of the Vance spreading segment on the Juan de Fuca Ridge (between 45°24'N and 45°50'N latitude), was analyzed to locate the present position of...
Resource Type:: Masters Thesis

Creator:: Longnecker, Krista
Abstract:: The microbial diversity associated with sulfide structures from three different hydrothermal vent fields was examined using phylogenetic analysis based on the small subunit ribosomal RNA gene (16S rDNA). Samples were collected from sites at 9°N, Guaymas Basin and the Juan de Fuca Ridge and analyzed with denaturing gradient gel electrophoresis...
Resource Type:: Masters Thesis

Creator:: Mason, Olivia Underwood
Abstract:: Oceanic crust covers nearly 70% of the Earth's surface, of which, the upper, sediment layer is estimated to harbor substantial microbial biomass. Marine crust; however, extends several kilometers beyond this surficial layer, and includes the basalt and gabbro layers. In particular, the basalt layer has high permeabilities which allows for...
Resource Type:: Dissertation
Full Text:: Basalts samples were collected at the CoAxial segment of the Juan de Fuca Ridge and from neighbouring

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