Jon Krier, MA Archeology at University of Oregon will be discussing his work on coastal paleoland forms. In 2016, in a collaboration between OSU and the Confederated Tribes of Grand Ronde, a new set of coastline change models for the last 20,000 years were developed. The goal of the project was twofold: First, the straightforward goal was to get a clearer picture of how the Oregon and Washington coastlines had changed since the Last Glacial Maximum in light of newly developed digital elevation models that incorporated isostatic adjustments.
Progress report on an integrated study of an Eocene subtropical shelf-margin delta, Coos Bay, Oregon
The Middle to Late Eocene Coaledo Formation and underlying Beds of Sacchi Beach record a marine history of forearc sedimentation. The sediments aggrade from slope turbidites to shoreface deltaic sandstone encased in deep-water silty mudstone. This talk is a progress report on a multiyear, multidiscipline research program, testing the hypothesis that the Sacchi Beach-Coaledo succession represents a shelf-margin lowstand of sealevel deltaic system. A team of 12 geoscientists is collecting an interdisciplinary database for reassessing the depositional history of the rocks exposed along the Cape Arago, Shore Acres and Sunset Bay State Parks.
Ride with us along the Eastbank from the Portland's youngest rocks to its oldest. We will dine after at the Milwaukie Station Food Carts and Beer Garden. No geologic knowledge required.
This is a 3-hour moderately-paced bike ride (9 miles) with a return by MAX. (A shorter 5 mile route, with return by MAX, is also available.) We will be starting from "Peace Sign Park" at NE Oregon and Interstate. Tickets go on sale March 10.
PSU Geology doctoral candidate Vanessa Swenton will discuss her research investigating some of the volcanic eruptions that occurred in eastern Oregon approximately 16 million years ago (Ma) to present day. There are two dominant volcanic provinces that have had episodes of high-silica (silicic/felsic) volcanism in eastern Oregon. The older episode is known to be associated with the Yellowstone mantle plume and Columbia River Basalt Group volcanism. The younger episode is within the High Lava Plains, and it is debated as being solely a result of the initial Yellowstone plume, or as a result of Cascadia slab rollback processes.
Dedicated to Pacific Northwest Geology since 1935
The Geological Society of the Oregon Country (GSOC) is a non-profit organization based in Portland, Oregon. The society is dedicated to the study of geology in the Pacific northwest and is open to persons with all levels of education and professional backgrounds.