This article is going to be a bit of a departure from the typical GSOC Friday night lecture synopsis, because there is an online video version of the “Supervolcanoes” lecture available on Nick Zentner’s web page. However, the GSOC lecture itself was a happening due to the popularity of Zentner’s video productions, and there were some wrinkles in the Supervolcanoes lecture that he did specifically for our group that are worth noting. To begin the lecture, Zentner talked about his inspiration for doing the topic of Supervolcanoes in the Pacific Northwest.

GSOC participants had a great little trip to the Corvallis area in mid-July to observe the geological features of Marys Peak and the Tyee formation along US 20 between Philomath and Newport, Oregon. Sheila Alfsen led the group on Saturday, July 13, on a tour of Marys Peak. Her tour was partially based on the very excellent book by Robert J. Lillie, Oregon’s Island in the Sky: Geology Road Guide to Marys Peak. This book is available online at a very reasonable cost.

President Sheila Alfsen called the meeting to order at Barbara Stroud’s home. Other board members in attendance were Barbara Stroud, Dawn Juliano, Paul Edison- Lahm, Julia Lanning, Dennis Chamberlin and Carol Hasenberg, constituting quorum. Minutes of the June 2019 board meeting were approved.

by Teresa Meyer

For those of us who were fortunate enough to participate in the Wallowa GSOC field trip, along with stunning geology we were immersed in an abundance of wildflowers. We were surrounded by an unbelievable variety of wildflowers everywhere we went. At any one time you could stand still and see more than a dozen or more different flowers surrounding you.

I’ll begin this article with a picture of the Buckhorn Overlook taken on May 18, 2019, when Evelyn, Julia and I did the reconnaissance for the Wallowa trip. We were directed up here by guest field trip leader Ellen Morris Bishop as this is the best overlook of the eastern canyons area for observing the ranks upon ranks of Columbia River Basalt flows that override the exotic terrane rocks of Hells Canyon, Imnaha Canyon and the Zumwalt Prairie through which we had travelled to get there. We are actually looking down into Imnaha Canyon here and Hells Canyon is just over on the other side of the last green ridge you can see. The blue ridge beyond is the eastern wall of Hells Canyon.

A Big Thank You to all the GSOC Helpers!

GSOC’s contribution to this year’s GSA Cordilleran section meeting was a huge success thanks to the many hands that helped build the booth and manned the booth:

• Charlie Raymond

• Marty Muncie

• Clay Kelleher

• Cris Morgante

• Denny Chamberlin

• Herb Dirksen

• Maryann Amann

• Fenella Robinson

And thanks to Paul Edison-Lahm for the beautiful poster and business cards.

Great job you guys!

This spring Portland area schools have asked for supplements to their regular Earth Science curricula and GSOC was happy to respond.

In May, Springwater Environmental Science School in Oregon City asked for a speaker on the subduction earthquake, to which President Sheila Alfsen, as public outreach officer for GSOC, responded. The students were very engaged and interested to learn about this important topic.

In June, Hockinson Middle School asked for rocks to use as a classroom set. Word was put out to GSOC members who responded generously! We were able to donate classroom rocks for both Earth Science teachers at the school.

Sheila spent the day preparing the seventh graders for their upcoming hike around the pumice plain at Mt St. Helens. The school is grateful to have our help!

Public outreach is also being expanded by Past-President Paul Edison Lahm at our monthly GSOC Meetup group at Woodstock Wine and Deli. Paul will also be collaborating on outreach this summer with Oregon Agate and Mineral Society, People of Color Outdoors, and Positively Portland.

President Sheila Alfsen called the meeting to order at Barbara Stroud’s home. Other board members in attendance constituting quorum were Barbara Stroud, Dawn Juliano, Rik Smoody, Paul Edison-Lahm, and Carol Hasenberg, constituting quorum. Also in attendance was Evelyn Bennett. Minutes of the April 2019 board meeting were approved.

Gretchen Baller
Wendy Whitsell
John & Kathleen Beaulieu
Roger Ley
Bruce Castle
Cynthia Smith
Alfred & Nina Fleckenstein
Mariah Tilman
Jill Cohen & Justina Cotter
John Adams
Gary Seitz
Laurie Elliott
Ann Cornely
Michael Dunn
Rebecca Bateman

President Sheila Alfsen called the meeting to order at Barbara Stroud’s home. Other board members in attendance constituting quorum were Barbara Stroud, Dawn Juliano, Rik Smoody, Megan Faust, Julia Lanning, Paul Edison-Lahm, and Denny Chamberlin. Also in attendance was Evelyn Bennett.

This article has been written to ‘peak’ your interest in the 2018 Kilauea eruption on the ‘Big Island’ of Hawaii in the Hawaiian Islands. USGS researchers have recently released a summary of the events of 2018 and their importance to the study of shield volcano eruptions in an article in Science on January 25, 2019, entitled ‘The 2018 Rift Eruption and Summit Collapse of Kīlauea Volcano.’

Perhaps ‘peak’ is not the right word when referring to Kilauea. Travelling up Hwy 11 around the South Point area to the Kilauea caldera, you cannot even see the summits of Mauna Loa on the left and much smaller Kilauea on the right. These young Hawaiian shield volcanoes are massive and wide. Between Na’alehu and Pahala there are some weird looking slump blocks on the slope of Mauna Loa to the left. And as you approach the summit of Kilauea, there is a small canyon formed in the crease between the two volcanoes on the left. But once you see the Kilauea caldera you won’t mistake this for anything less than an active volcano.

Or, what goes up must come down!

This article came about by Sheila Alfsen asking me to include some information about the Great Crack of Kilauea, which might interest some of the membership when they are visiting the Big Island of Hawaii. I didn’t feel I could do justice to the topic unless I also covered the great landslides, produced by volcanic spreading, on the ocean floor surrounding the Hawaiian islands.

The knowledge of landslides around the Hawaiian islands did not come about until the 1980’s. As a result of then President Reagan’s refusal to sign the Law of the Sea Treaty proposed by the UN in 1983, and subsequent announcement that the US would be declaring a 200-mile Exclusive Economic Zone around all of its territories, the USGS was tasked with mapping those underwater zones. They did so with a relatively new technology, side-scan sonar, which has fairly good resolution for mapping large blocks of material on the ocean floor.

Dennis Moody

Charles Holt

Fred & Judith Shipley

Matt & Darcie Laufenberg

Weican Chen

Ann Cornely

Nancy Ketrenos

Peter Samson

President Paul Edison-Lahm called the meeting to order at his home. Other board members in attendance constituting quorum were Dawn Juliano, Sheila Alfsen, Rik Smoody, Larry Purchase, and Megan Faust (appearing remotely). Minutes of the December 2018 board meeting were approved.