This trip will focus on the geology and hydrology of the Johnson Creek Watershed. This will be an approximately 6 hour van tour led by Melanie Klym and Matthew Brunengo. Thanks to GeoEngineers for their generous sponsorship of this event. New start/end location: front of MILWAUKIE CITY HALL, 10722 SE Main St.
This field trip, organized by GSOC President Paul Edison-Lahm, will focus on the geology of Camp Hancock and the John Day basin. We will be attending an Astronomy Star Party as guests of the Rose City Astronomers and OMSI. This event is sold out.
Once again this year, Sheila Alfsen will host a tour by helicopter of Mt. St. Helens and the surrounding devastation area on Aug. 18, 2018. The price includes a presentation in the gift shop theater of the 1980 eruption and its aftermath, and a 40 minute flight over the devastated area and close up to the crater where you can see the effects on the landscape. Additionally Nathan Reynolds, Ethno-ecologist and Habitat Program Manager for the Cowlitz Indian Tribe, will be giving a presentation about the federal designation of Lawetlat’la/Mt. St. Helens as a Traditional Cultural Property of the Cowlitz Tribe and Yakima Nation. This event is sold out.
Join us at the Rice Northwest Museum of Rocks and Minerals for our annual potluck picnic, Sunday, August 12 at noon. Your $10 will go both to your day's museum admission and to your annual membership to the Rice Museum as a GSOC member. This year will be a great time to take advantage of this offer and treat yourself to a tour of this highly esteemed Pacific Northwest treasure.
Our speaker this year is Dr. Nick Famoso, John Day Fossil Beds National Monument Chief of Paleontology & Museum Curator, who will discuss the world-class John Day Fossil Beds. Nick's work has focused on the recovery of mammalian eco-systems after volcanic eruptions such as Mt. St. Helens and the Picture Gorge ignimbrite.
Picnic is potluck style, so board members will bring a main protein-based dish and general members may bring any type of side dish, dessert, or beverage (no alcohol). The Rice Museum is at 26385 NW Groveland Drive, Hillsboro, OR. Hope to see you there!
With cooler weather forecast for Saturday, 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.
Sign-ups are now full. If you have already signed-up for this field trip with Dave Olcott, use the registration page to complete your registration and pay your registration fee. If you'd like to be on the alternate list, please email Dave.
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. We will be meeting at Pioneer Courthouse Square, across from the 6th Avenue Pioneer Courthouse entrance.
The Geological Society of the Oregon Country will host a one-day helicopter field trip of Mt. St. Helens. 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.
This trip limited to GSOC members and their guests only. Become a member today!
Registration now open. Limited to GSOC members and their guests only. This field trip, organized by GSOC President Rik Smoody, will focus on the geology of the Cascades and will climax in the total eclipse of the sun on the morning of August 21. It will be held at a private property in Mill City, Oregon, and will be limited to 48 GSOC members and their guests and 12 vehicles. Cost $80 per person.
This year’s GSOC picnic will be held at the farm belonging to GSOC Past President Janet Rasmussen and her husband Doug Rasmussen. It is open to GSOC members only. It will be held at 5401 NE Riverside Drive, McMinnville, Oregon. If you are coming, bring $5 a head to offset production costs, your favorite picnic chair, your favorite beverage and a side dish or dessert. Janet will be providing hamburgers and veg hamburgers, buns and condiments. Games will include croquet and billiards.
Because of the high temperatures forecast for Saturday, the starting time for this tour has been pushed up to 9:00 a.m. We will fully refund your fee if you have already registered and the new time doesn't work for you. Sorry for the inconvenience. Email Paul with questions or cancellations.
Come see billion-year-old building stones and the fossils hidden under our feet. Join us for a two-hour outdoor walking tour of downtown Portland’s geological mysteries and oddities. This tour is open to the public.
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.
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.
Tour Portland Geology with Us by Public Transportation.
A short survey of some of Portland's geologic features that reveal its past and structure. This is a great tour for those new to geology or Portland or both. Registration open now! Trip requires TriMet day pass.
President Janet Rasmussen will lead a field trip to the Steens Mountain area of Southeast Oregon.
Learn the dramatic story of the great flood basalts of the Columbia River Gorge which form its spectacular walls and waterfalls.
Join us for our annual potluck picnic, Sunday, August 2nd, 2015 at 12:00 noon at Guy Talbot State Park in the Columbia Gorge (same location as last year). Learn the dramatic story of the surrounding Columbia River Gorge and the great flood basalts which form its spectacular walls and waterfalls. After the picnic, participants may wish to take the short walk to Latourell Falls, or drive to the trailhead near the freeway exit and hike up to Angel's Rest.
Bring your own beverages and we will provide the plates and plastic utensils. The format for the picnic will be a potluck. If your last name begins with:
A through G - bring a main dish
H through P - bring a side dish or salad
Q through Z - bring a dessert.
Past President Larry Purchase and current Vice President Bo Nonn will lead a two-day field trip to the north side of Mt. Hood. From our camp at Cloud Cap Saddle Campground we will climb onto the nearby Cooper Spur moraine to view the terminus of Eliot glacier and discuss the morphology of the Hood’s largest glacier and its periglacial features. Farther downslope we will examine the site of a major debris flow which passed down Eliot Creek in 2006. Nearby is the upper end of the 9km long Parkdale lava flow, a basaltic lava flow less than 8,000 years old. If possible we will examine the more accessible portions of the lava flow including the vent area.
Interested in being a tour guide for our upcoming PDX Downtown Geology Tour? We are doing a pre-run/organizational meeting for the tour Wednesday, April 8th, 9:00 a.m at the Pioneer Place Mall Fountain (the one with the black limestone bollard caps with crinoid stars).
Come if you're interested in helping or just curious to watch geologists with hand lenses crawling around Portland's most distinguished buildings. RSVP to Paul Edison-Lahm.
Wednesday, September 3, 2014 – Saturday, September 6, 2014
Join us for this year's President's Field Trip to Silver Falls State Park and the Eastern Cascades! Led by GSOC President Sheila Alfsen, this trip will feature Dr. William Orr as guest speaker on the western side of the Cascades and Jason McClaughry of DOGAMI on the eastern side....