At the end of the Ice Age when the Lake Missoula Flood roared across the landscape, the floodwaters carried with it granite and other boulders. These rocks, referred to as erratics, were encased in the floating sections of the broken ice dam and distributed along the path of the mighty waters from Montana to the Pacific Ocean. Rick Thompson of the Ice Age Floods Institute will tell about the ongoing hunt for these iceberg erratics in the Portland/Willamette Valley area, explain how to recognize an erratic, and discuss ice age floods around the world.
Join us for a one day field trip to study Missoula Floods gravel and cobble deposits, and Boring volcanism in Clark County on Saturday, June 17, 2017. Tour will be given by Bill Montgomery, CEMEX Executive, and GSOC Past Presidents Bo Nonn and Larry Purchase.
We can't get enough of exploring Downtown Portland Building Stone! If you missed our Spring tour or just want to see more interesting buildings, join us for this two-hour walking tour of more of downtown Portland's geological mysteries and oddities. This tour is open to public.
Thomas Condon, Frontier Missionary and Oregon’s First State Geologist, came to the Oregon Territory in 1852 and soon became interested in its remarkable fossil assemblage.
Condon's personal collection of Oregon plant and animal fossils reflect not only his science but his travels and associates as well. Dr. Orr will examine these aspects of his life as well as the nature of his work and achievements.
The High Lava Plains is an enigmatic province between the hot-spot related Steens Basalts and the subduction-related Cascades. Dr. Grunder will explore the implications of the westward age progression of rhyolites and the effect of protracted magmatism on the composition of the volcanic rocks and the crust.
Social hour before the lecture: join us at 6:00 p.m. at Pizzicato, 1708 SW 6th Avenue for delicious pizza and salads and beverages.
The Geological Society of the Oregon Country invites you to its 82nd Annual Banquet. GSOC President Bo Nonn will present “Cascade Geology From the Top Down: Features You Won't See From the Road.” The banquet will be held March 12, 2017, at Ernesto’s Italian Restaurant. Doors to the banquet room open at 1:00 p.m. Dinner at 1:30 p.m. Program will begin at 2:15 p.m.
Speaker Mike Collins, mountaineering and geology enthusiast, will present “Time Travel Tales from the Yellowstone Hotspot and Great Basin Geological Province.”
GSOC Members and their guests are invited to the 8th GSOC Annual Holiday Party and field trip slideshow.
There will be no December Friday night meeting due to the Holiday Party.
Dr Richard Waitt from USGS CVO will elaborate on his recent book In the Path of Destruction: Eyewitness Chronicles of Mount St. Helens: "The May 18, 1980 eruption of Mount St. Helens was an international sensation. Those who lived through it never forget the experience. A geologist with intimate knowledge of Mount St. Helens, Richard Waitt chronicles the eruption story through unforgettable, riveting narratives—the heart of a masterful chronology that also delivers engrossing science, history, and journalism." (Washington State University Press)
PSU Has Discontinued Free Evening Parking. GSOC has just received a communication from the Portland State University Geology Department office that stated “Please be advised that beginning Monday, September 19th, all PSU parking facilities will require payment or valid permit at all hours, all days, except for university holidays. Vehicles found on campus without proof of payment or valid permit will be subject to citation.” This means that we will no longer be able to park for free in the PSU parking garage on Friday nights.
The cheapest option is to look for nearby on-street parking. If you find a spot it's $2.00 per hour until 7:00 pm and free after that. For people willing to walk a few blocks, either PSU Parking Structure 3 at 12th and Mill Street or the Shattuck parking lot at Broadway and College Street will charge $2.50 per hour. The structure we have been using, PSU Parking Structure 2, will now charge a flat $7.00 for the evening, with no hourly rate. A useful map is at the PSU website.
FOR PEOPLE USING PUBLIC TRANSPORTATION
Look for a convenient park and ride near a MAX train or bus stop. The #19 bus and the Orange Line MAX drop you off within a block or two of PSU. The bus gets scarce after 9:00 but MAX runs pretty frequently.
A One-day Field Trip
The Geological Society of the Oregon Country will host a one-day helicopter field trip of Mt. St. Helens. We will be based at Hoffstadt Bluffs Visitor Center on the North Fork of the Toutle River. The helicopter tour is approximately 40 minutes of spectacular scenery as you fly over both the devastated area from the 1980 eruption and the crater itself. An educational presentation by Sheila Alfsen will precede your tour so that you can recognize and interpret the landscape in light of the greatest volcanic event in recorded U.S. history.
The deadline for your payment is Thursday, Sept 29th, 2016. Click for tour and payment information.
Registration now closed. Stay tuned for our report on the trip!
Our four-day excursion will travel down the coast to Brookings and across to Grants Pass before returning via I-5. The emphasis will be on the complex geology of the Mesozoic accreted terranes of the Klamaths but on the way we will take a look at Tertiary terranes of the north coast and interactions of Columbia River Basalt flows with coastal sediments.
This year’s annual picnic will be held at Tualatin Community Park, 8515 SW Tualatin Rd, Tualatin, OR. At this year’s annual picnic, we have reserved the north side of the main picnic shelter, which also has rest rooms, from 11:00 am to 3:00 pm. Electricity is provided, and alcohol is permitted. The shelter will accommodate about 75 people.
Fossils are protected resources at ground-disturbing construction sites on public lands in the United States. A matrix of federal, state, and county laws require the retrieval of fossil objects that might be used for display, research or teaching. Sheila Alfsen will speak on her experiences in salvage paleontology industry, working in the states of the western United States.
A Lagerstätte (German from Lager 'storage, lair', Stätte 'place'; plural Lagerstätten) is a sedimentary deposit that exhibits extraordinary fossils with exceptional preservation—sometimes including preserved soft tissues. These formations may have resulted from carcass burial in an anoxic environment with minimal bacteria, thus delaying decomposition.
Image: middle Cambrian Ottoia, a soft-bodied worm, from the Burgess Shale; Credit: Martin R. Smith.
...and how you can help us get there!
Allison M Pyrch, PE, GE Associate Geotechnical Engineer will address seismic issues in the PacNW, where we are, where we need to be, and how we need to get there. She will touch on personal and family prep and the latest science as well. It will be a little interactive, a little brainstorming, and a call to action!
Ticket deadline March 8th
The Geological Society of the Oregon Country invites you to its 81st Annual Banquet. Speaker Dr. Alan Mix, Oregon State University and co-chief scientist for the international research project on Petermann Glacier in Greenland, will present “Viewing Climate “Tipping Points” from Petermann Glacier.”
Combining Historic and Paleoseismic Data to Characterize Earthquake Hazard
Dr. Ashley Streig has sixteen years experience in active tectonics, paleoseismology, structural geology and tectonic geomorphology. Her research experience includes the study of active faults and folds, earthquakes and associated hazards, earthquake recurrence, fault behavior, and rupture characteristics. Dr. Streig has investigated pre-historic seismic activity of fault systems around the world, including local studies of the San Andreas Fault, CA and crustal faults along the Cascadia Subduction Zone.
Big Earthquake Overdue for Pacific Northwest?
American Meteorological Society presents:
Guest Speaker Dr. Chris Goldfinger
Director of Active Tectonics and Seafloor Mapping Laboratory, Oregon State University
Free and open to the public.
(This is not a GSOC event.)
Nicolas Steno: Founding Father of Geology
Friday Night Lecture, January 8, 2016: Kyle Dittmer, GSOC member and faculty member, PCC Southeast Campus and Portland State University, will present “Steno.”
Prof. Dittmer will talk about a little known but brilliant Renaissance Danish scientist named Nicolas Steno. What were Steno’s contributions to Geology? Why is his story unique? Come join us and find out! Prof. Dittmer has taught Earth Science for 25 years. Come hear this interesting thought-provoking science-history talk!
Past-president Sheila Alfsen at the Ice Age Flood Institute
Fossils are protected resources at ground-disturbing construction sites on public lands in the United States. A matrix of federal, state, and county laws require the retrieval of fossil objects that might be used for display, research or teaching . Sheila Alfsen will speak on her experiences in salvage paleontology industry, working in the states of the western United States.
Dr Nancy Price, Portland State University
Addressing Tectonic Questions from the Perspective of Rheology*
*Rheology: the study of the flow of matter
There are two ways in which structural geologists look at the formation of mountain belts and transform plate boundaries. The first is to describe the folds and faults as rocks reacting to events, and to study the deformation and mineral growth as a reaction to these events. The second is to study the material properties and deformations of the rock layers as a response to stress fields, and to explain the formation events in terms of these properties. In effect, the strength and deformation behaviors of the rocks control the formation of the mountain belts and fault zones. This is the perspective of rheology. In this lecture, Price will show examples of viewing rocks from a rheological perspective and interpreting tectonic history in this light.
The Ice Age Floods National Geological Trail (IAFNGT) will become a reality in 2016. Rick Thompson, President of the Lower Columbia Chapter of the Ice Age Floods Institute, will be presenting the trail as it is now and show some of the ways it will become manifested.
Where: Tualatin Library Community Room
18878 SW Martinazzi Avenue, Tualatin, OR 97062
Dr. Marli Miller, University of Oregon
Author of the New Edition of Roadside Geology of Oregon (2014)
Dr. Miller's research emphasizes the use of small-scale structures to reconstruct the structural and kinematic histories of high strain zones. She is especially interested in the transition from brittle to ductile behavior in these zones at meso- to microscopic scales. Much of Marli's work is in Death Valley, California where she is also involved with tectonic interpretations.
About Roadside Geology of Oregon, Second Edition (Amazon Review) "Geologist, photographer, and author Marli Miller has written a completely new second edition based on the most up-to-date understanding of Oregon s geology. [Dr. Miller's] spectacular photographs showcase the state’s splendor while also helping readers understand geologic processes at work. Roadside Geology of Oregon, Second Edition, is a must-have for every Oregon resident, student, and rockhound alike."
Energy Infrastructure Preparedness for a Cascadia Mega-Earthquake
Northwest Energy Association and The Society of Petroleum Engineers (not GSOC sponsored event)
On October 2-3, 2015 in Hood River, Oregon a diverse spectrum of scientists and emergency agency leaders will address the cause, history and mitigation of problems resulting from "The Really Big One", the predicted Cascadia Mega-Earthquake. Primary focus of the Symposium will be on the energy infrastructure, a critical component for an effective response to a major earthquake.
Father of Oregon Geology Thomas Condon (1822-1907) will address the 2015 Western Regional Conference of The Association of Living History, Farm, and Agricultural Museums (ALHFAM) on Friday September 25th at 7:30 p.m. at the Yamhill Valley Heritage Center. Bob Hart, Executive Director of the Lane County Historical Society and a living history interpreter, will bring this 19th century Oregon legend to life.