Eastbank Bike GeoTour & Picnic
Jun
23
10:00 AM10:00

Eastbank Bike GeoTour & Picnic

  • 701 Southwest 6th Avenue Portland, OR, 97204 (map)
  • Google Calendar ICS

9 Mile Ride with Return by MAX
Join us for our first annual Eastbank Bike GeoTour! We will be riding from the youngest to oldest rocks in Portland/Milwaukie along the Eastbank Esplanade and Springwater trail, with a picnic stop at Westmoreland Park.

This is a half-day event with a picnic stop. The ride is 9 miles long with return by MAX, although a shorter 5 mile route is available. Please bring snacks, water and picnic lunch and be prepared to ride in sun or rain.

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July Lecture: A Tail Between Two Cities: the Yellowstone Plume (Head and Tail) Between John Day and Burns, Oregon
Jul
13
7:30 PM19:30

July Lecture: A Tail Between Two Cities: the Yellowstone Plume (Head and Tail) Between John Day and Burns, Oregon

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

Emily Cahoon's talk will focus on volcanic deposits around the John Day Valley and further south to Burns, Oregon. This includes the Clarno Formation, John Day Formation, and lots of mid-Miocene lavas and tuffs. Also, there are unstudied Oligocene to mid-Miocene basaltic lavas and dikes exposed south and east of known PGB localities. These help to reevaluate Picture Gorge Basalt (PGB) distribution and to better understand evolution, mantle components, and possible petrogenetic connections among PGB, Steens Basalt, and the Strawberry Volcanics. Broadly, we will explore the proposed connections between the John Day Formation, the Columbia River Basalts, and the Yellowstone plume.

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Mt. St. Helens Helicopter Tour
Aug
18
10:00 AM10:00

Mt. St. Helens Helicopter Tour

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 trip will be conducted at the North Fork Survivors Gift shop, located at 9745 Spirit Lake Hwy, Toutle, WA, 98649. Helicopters are flown by Hillsboro Aviation. 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. Other activities available at the site include picnicking, gift shop browsing with Big Foot memorabilia, and a Lahar buried A-frame house.

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GSOC President’s Field Trip: Camp Hancock with the Rose City Astronomers
Sep
14
to Sep 16

GSOC President’s Field Trip: Camp Hancock with the Rose City Astronomers

  • Camp Hancock Field Station (map)
  • Google Calendar ICS

This field trip, organized by GSOC President Paul Edison — with past-presidents Rik Smoody, Bo Nonn, Sheila Alfsen, and Larry Purchase — 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.

Note: this trip will include two evenings of observing as guests of Rose City Astronomers/OMSI. Evenings under the stars can be quite cold in September. Conditions at Camp Hancock are primitive. We will be sleeping two nights in bunkbeds with thin mattresses in shared bunkhouses. As the camp is set up for dark sky observing, red lights will be provided for navigating in nighttime. Restrooms are 10-50 yards away. No food is allowed in cabins. Cars are off limits at because of car lights. Daytime will include hiking over rough terrain in hot weather. Rattlesnakes and ticks have been observed on the trail.

UPDATE: Registration will open June 15. Limited to GSOC members and their guests only. If you have questions, please call Paul at 971-404-6064.

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June Lecture: A New Look at “Old” Tuffs at Newberry Volcano (Dr. Jeffrey Templeton)
Jun
15
7:30 PM19:30

June Lecture: A New Look at “Old” Tuffs at Newberry Volcano (Dr. Jeffrey Templeton)

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

Evaluating the Influence of Cascadia Subduction and the High Lava Plains on Magmatism at a Geologic Crossroads in Central Oregon. Our speaker Dr. Jeffrey Templeton is a Professor of Geology at Western Oregon University, where his research interests include igneous petrology, volcanology, and undergraduate geoscience education.

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May Lecture: Oregon's Slow Rotation Is Responsible for Earthquakes in NW Urban Corridor (Ray Wells, USGS)
May
11
7:30 PM19:30

May Lecture: Oregon's Slow Rotation Is Responsible for Earthquakes in NW Urban Corridor (Ray Wells, USGS)

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

Paleomagnetists — scientists who track the motions of continents from ancient magnetic field directions frozen into rocks — have long known that Oregon has been slowly rotating clockwise over geologic time. Today, GPS documents that the entire Pacific Northwest is rotating clockwise at a little less than 1 degree per million years, causing the Coast Range to move northward and push against slow-moving Canada. The northward push is responsible for crustal earthquakes on shallow faults in the Northwest urban corridor. Dr. Ray Wells has been a research geologist with the USGS for 40 years, where he used field geology, paleomagnetism, and GPS to understand the tectonic evolution and seismic hazards of active continental margins.

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April Lecture: Large, Abundant Landslides in the Western Columbia Gorge (and Some Still Active)
Apr
13
7:30 PM19:30

April Lecture: Large, Abundant Landslides in the Western Columbia Gorge (and Some Still Active)

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

Recent lidar mapping of large landslides in the western Columbia Gorge in Skamania County, WA, shows that there are many more landslides than previously thought. The mapping area contains at least 215 discrete landslides of various ages — ranging from more than 15,000 years old to currently active. Tom Pierson is a senior research scientist at the USGS Cascades Volcano Observatory in Vancouver, Washington, where his investigations focus mainly on volcano hazards involving lahars (mudflows), floods, and landslides — processes occurring both during and following volcanic eruptions.

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83nd Annual Banquet: Ellen Morris Bishop to Speak
Mar
11
1:00 PM13:00

83nd Annual Banquet: Ellen Morris Bishop to Speak

Sorry registration is now closed. The Geological Society of the Oregon Country invites you to its 83rd Annual Banquet. Speaker Ellen Morris Bishop will present “Mountains out of Molehills: A Brief History of The Wallowas.” The banquet will be held March 11, 2018, at Ernesto’s Italian Restaurant. Doors to the banquet room open at 1:00 p.m. Buffet Luncheon at 1:30 p.m. Program will begin at 2:45 p.m.

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February Lecture: An Amateur's Guide to the Geology of Johnson Creek and Eastside Portland
Feb
9
7:30 PM19:30

February Lecture: An Amateur's Guide to the Geology of Johnson Creek and Eastside Portland

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

The Johnson Creek Watershed contains volcanoes, Missoula flood deposits, and the oldest rocks in the East Portland Metro. Though this dramatic geologic history is usually obscured by vegetation and development, the creek cuts a slice down through the geologic layer cake to reveal the rock formations underlying Gresham, Southeast Portland, and Milwaukie. Paul Edison-Lahm will lead this virtual tour of the Watershed and give tips for exploring Portland's Eastside.

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January Lecture: GSOC's Year in the Field
Jan
12
7:30 PM19:30

January Lecture: GSOC's Year in the Field

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

GSOC field trip leaders will present our "Year in Review" program with brief slide show summaries of their trips.

  • Rik Smoody: “The Eclipse! And More…,” August 18-21

  • Larry Purchase: “GSOC Rock Quarry and Gravel Pit Field Trip,” June 11-12

  • Sheila Alfsen, “Mt. St. Helens Helicopter Tour,” September 9

  • Paul Edison-Lahm, "Downtown PDX Building Stone Tours," June 24, Oct 7

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GSOC 9th Annual Holiday Party and Potluck
Dec
16
6:00 PM18:00

GSOC 9th Annual Holiday Party and Potluck

GSOC Annual Holiday Party is scheduled for SATURDAY, December 16, at 614 NE 114th Ave., Portland. GSOC Board Members will provide main dishes with protein of various sorts. Other members please bring vegetable, side dishes or desserts for 6 to share, plus beverage of their choice. Music program to be announced.

There will be no December Friday night meeting due to the Holiday Party. 
 

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Friday Night Lecture — Leslie Moclock, "Oregon’s Gems: The Geologic Stories Behind Beautiful Stones"
Nov
10
7:30 PM19:30

Friday Night Lecture — Leslie Moclock, "Oregon’s Gems: The Geologic Stories Behind Beautiful Stones"

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

Oregon’s volcanic history has given us more than mountains. Come learn how sunstones and opals feature in our state’s geologic past. Leslie Moclock has been the curator at the Rice Northwest Museum of Rocks and Minerals since 2014. She holds a MS in Geology from University of California-Davis and a BA from Amherst College.
(Geode photo by Jeff Scovil, courtesy Rice Northwest Museum of Rocks and Minerals.)

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Friday Night Lecture — Jason McClaughry: New Findings in the Middle Columbia Basin
Oct
13
7:30 PM19:30

Friday Night Lecture — Jason McClaughry: New Findings in the Middle Columbia Basin

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

The Middle Columbia Basin of north-central Oregon lies across the axis of the High Cascades volcanic arc, stretching from Cascade Locks east to Biggs and southward from the Columbia River to Tygh Valley. Ongoing Geologic mapping in the basin by the Oregon Department of Geology and Mineral Industries is providing new insight into the middle Miocene to present volcanic and structural development of the region. Jason McClaughry, DOGAMI Eastern Oregon Regional Geologist, will summarize local Columbia River Basalt Group stratigraphy, discuss new geochemical data and geochronologic constraints on late Miocene to Pleistocene Early to Late High Cascades Volcanic Rocks, and characterize the major structural trends in the region. 

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Downtown PDX Geology North Tour
Oct
7
1:00 PM13:00

Downtown PDX Geology North Tour

  • Pioneer Square (across from Pioneer Courthouse) (map)
  • Google Calendar ICS

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. 

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Johnson Creek Watershed Geology Science Pub
Sep
21
5:30 PM17:30

Johnson Creek Watershed Geology Science Pub

The Johnson Creek Watershed contains volcanoes, Missoula flood deposits, and the oldest rocks in the Portland Metro. Though this dramatic geologic history is usually obscured by vegetation and development, the creek cuts a slice down through the geologic layer cake to reveal the rock formations underlying Gresham, Southeast Portland, and Milwaukie. Grab a pint at the Eagle Eye Tavern and find out more at this science talk, by the GSOC's own Paul Edison-Lahm. This is a Johnson Creek Watershed Council event. Register here. 

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Mt. St. Helens Helicopter Tour
Sep
9
10:00 AM10:00

Mt. St. Helens Helicopter Tour

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! 

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Friday Night Lecture: Teaching and Doing Geology in Southern Oregon
Sep
8
7:30 PM19:30

Friday Night Lecture: Teaching and Doing Geology in Southern Oregon

  • Cramer Hall, Portland State University (map)
  • Google Calendar ICS

Frank Hladky, Oregon Registered Geologist and Geology Instructor will discuss Getting the Science Right: Teaching and Doing Geology in Southern Oregon. Teaching geology to youth requires clarifying the philosophy of rational thought. Geology, like other sciences, relies on evidence to substantiate interpretations. Utilizing vignettes from geological field studies in southern Oregon, Mr. Hladky shows how multiple lines of evidence leads to an understanding of the natural world with greater clarity.

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GSOC President’s Field Trip: Eclipse! (and More)
Aug
18
to Aug 21

GSOC President’s Field Trip: Eclipse! (and More)

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. 

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Annual Picnic
Jul
16
12:00 PM12:00

Annual Picnic

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.

Become a GSOC member today!

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Downtown PDX Geology South Tour
Jun
24
9:00 AM09:00

Downtown PDX Geology South Tour

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.

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Erratic Boulders — Legacy of the Ice Age: Talk by Rick Thompson
Jun
9
7:30 PM19:30

Erratic Boulders — Legacy of the Ice Age: Talk by Rick Thompson

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.

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Thomas Condon's Fossil Collection: Talk by Dr. Bill Orr
May
12
7:30 PM19:30

Thomas Condon's Fossil Collection: Talk by Dr. Bill Orr

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.

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Volcanism of the Oregon High Lava Plains: Talk by Dr. Anita Grunder
Apr
14
7:30 PM19:30

Volcanism of the Oregon High Lava Plains: Talk by Dr. Anita Grunder

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. 

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82nd Annual Banquet
Mar
12
1:00 PM13:00

82nd Annual Banquet

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.

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Friday Night Lecture: Eyewitness Chronicles of Mount St. Helens
Oct
14
7:30 PM19:30

Friday Night Lecture: Eyewitness Chronicles of Mount St. Helens

  • Portland State University, Cramer Hall (map)
  • Google Calendar ICS

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.

FOR DRIVERS
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.

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Mt. St. Helens Helicopter Tour
Oct
1
10:00 AM10:00

Mt. St. Helens Helicopter Tour

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. 

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President’s Field Trip: Lava Flows and Accreted Terranes
Sep
6
to Sep 9

President’s Field Trip: Lava Flows and Accreted Terranes

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.

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