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Department News | Department of Geological Sciences

New Journal of Geophysical Research paper on tidal forces triggering low-frequency earthquakes

A team of researchers including our own Amanda Thomas have recently published a paper in the Journal of Geophysical Research: Solid Earth. Their analysis of low-frequency earthquake catalogs leads to a better understanding of the processes producing the sensitivity of these events to the cyclical ...

UO Geophysics group publication in G-cubed on a seismic discontinuity beneath the Galapagos

The UO geophysics group has a new paper in Geochemistry, Geophysics, Geosystems, led by Joseph Byrnes. This study maps an upper-mantle seismic discontinuity below the Galápagos Archipelago, and finds that this characteristic discontinuity cannot mark the base of the rigid lithosphere, as has been ...

New Nature Geoscience Letter from UO Geobiology group

The UO Geobiology research group, headed by Qusheng Jin, recently published a letter in Nature Geoscience, which documents evidence that microbial activity in groundwater is an important source of mobile arsenic. This publication, led by Scott Maguffin, has implications for the safety of well ...

Three UO students recognized with AGU student awards

At this year’s AGU meeting, three of our students were recognized for their outstanding presentations: Joseph Byrnes, AGU 2014 Outstanding Student Paper Award (poster presentation): Structure of the lithosphere-asthenosphere system beneath the Juan de Fuca plate: Results of body wave imaging ...

Spring 2015 Weekly Seminar Schedule

Talks on Wednesdays are from 4:00 to 5:20 pm in 110 Willamette Hall. Tea and cookies are served in Cascade 200 beginning at 3:30 p.m. April 1 – Kerin Claeson (Philadelphia COM) Title: Guitarfishes in Rocks of all Ages: The origin and evolution of Rhinobatiformes April ...

Quaternary Research paper on age of Willamette Valley Megafauna

Edward Davis is a contributing author on a paper in the latest issue of Quaternary research, headed by Danny Gilmour of Portland State University. This study used high-precision AMS radiocarbon dating to determine the ages of the latest megafauna found in the Willamette Valley, here in western ...

Geosphere paper on Pliocene rapid sediment aggradation in the Colorado River

Becky Dorsey is third author on a paper in the February 2015 issue of Geosphere. Howard et al. investigate the early Pliocene river-laid Bullhead Alluvium, exposed along the lower Colorado River downstream of Grand Canyon. They find that it records a massive pulse of sediment aggradation shortly ...

Publications for 2015

Byrnes, J.S., Hooft, E.E.E., Toomey, D.R., Villagómez, D.R., Geist, D.J., and Solomon, S.C., 2015, An upper-mantle seismic discontinuity beneath the Galápagos Archipelago and its implications for studies of the lithosphere-asthenosphere boundary: Geochemistry, Geophysics, Geosystems, p. ...

Two papers in latest issue of Geosphere

We’ve had two papers published in the latest issue of Geosphere: First, the study by Fattaruso, Cooke, and our Becky Dorsey uses 3D boundary-element models to simulate crustal deformation for different interpretations of the geometry of the southern San Andreas fault and smaller secondary ...

Frontiers in Earth Science paper linking Crooked River volcanics to the Yellowstone Hotspot

A new paper by Angie Seligman and Ilya Bindeman and colleagues analyzes the geochemistry of Eocene and Oligocene (40 to 28 million year old) volcanic rocks of the Clarno and John Day Formations. They found that these rocks “were produced by the first appearance of the Yellowstone plume east ...
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