WR CMG Staff: Guy R. Cochrane

WR CMG Staff: Guy R. Cochrane

Current Projects:

Nearshore Benthic Habitat Project

Glacier Bay Marine Biohabitats

Seismic Hazards Investigation in Puget Sound

Landslide Study in Sleeping Bear Dunes, Lake Michigan

Previous Projects:

Antarctic Acoustic Stratigraphy

I have modeled sonobuoy seismic refraction data from two areas of the Antarctic continental shelf. The modeling remains the most detailed modeling done on any refraction data from the area. My work has shown that ice-loaded strata can be detected using high resolution seismic refraction data in areas where drilling data is lacking (which is most of the Antarctic shelf). My results have been instrumental in identifying the major unconformities separating major ice advance events. My models help identify areas where coring should be done.

Picture of sonobuoy launch, Ross Sea, Antarctica (1.2 Mbytes)

Cochrane, G. R., DeSantis, L, Cooper, A.K., Continuity of glacial sequences in the Ross Sea from Sonobuoy Seismic-Refraction data, AGU Antarctic Research Series, v. 68a, p. 261-270, 1995.

G. Brancolini, M. Bussetti, A. Marchetti, L. De Santis, C. Zanolla, A.K. Cooper, G.R. Cochrane, I. Zayatz, V. Belyaev, M. Knyazev, O. Vinnikovskaya, F.J. Davey, K. Hinz, Descriptive text for the seismic stratigraphic atlas of the Ross Sea, Antarctica, Antarctic Research Series, v. 68a, p. 271-286, 1995.

Childs, J.R., A.K. Cooper, R. Sliter, G.R. Cochrane, M. Busetti, A. Marchetti, G. Brancolini, C. Zanolla, F.J. Davey, A.P. Cunningham, P.E. O'Brien, W. Jokat, Description of CD-ROM digital data: seismic stratigraphic atlas of the Ross Sea, Antarctica, and Circum-Antarctic seismic navigation, Antarctic Research Series, v. 68b, 1995.

Oregon Margin Fluid Venting and Accretion

My high resolution seismic reflection work was instrumental in the location of structurally controlled fluid-methane vents along the Oregon margin. Analysis of these data led to the discovery, using the research submersible Alvin, of cold-water vent site communities. This discovery led to tremendous excitement amongst the geological and biological community as it was the first in-situ observation of the ecosystem. My analysis of seismic velocities from CMG data was the first to show gradients in Cascadia basin that can only be explained by dewatering of sediment induced by modern tectonic stress.

Yongen C., C. Wang, W. Hwang, and G.R. Cochrane, The effect of fault-bend folding on seismic velocity in the marginal ridge of accretionary prisms, Pure and applied Geophysics, v. 145, p. 637-646, 1995.

Cochrane, G. R., Moore, J. C., Lee, H. J., Sediment pore-fluid overpressuring and its affect on deformation at the toe of the Cascadia accretionary prism from seismic velocities, in Subduction Top to Bottom, Bebout, G.E., Scholl, D.W., Kirby, S. H., Platt, J.P. (editors), AGU Geophysical monograph 96, p. 57-64, 1996.

WR CMG Web Site Management

After the Geologic Division's downsizing (RIF) I took over management of the WR Coastal and Marine Geology Web Site, which had previously been done by Alan Federman.

Education:

School	Degree	Specialization
Humboldt State	BA	Geology
Humboldt State	BS	Geo-Oceanography
U. Washington	MS	Marine Geophysics
U.C. Santa Cruz	PhD	Earth Science

Mailing address:
USGS MS-999
345 Middlefield Road
Menlo Park, CA 94025

Office Phone: (650) 329-5076
Fax Phone: (650) 329-5190
Email: guy@octopus.wr.usgs.gov
Personal web page: http://www.jps.net/guyrc/

This page, http://walrus.wr.usgs.gov/staff/gcochrane/, maintained by Guy R. Cochrane, was last modified July 17, 1998.

U.S. Department of the Interior, U.S. Geological Survey, Western Region Coastal and Marine Geology