Due to COVID-19, please stay tuned for updates from our AEG Board Members about future meetings.

December Hybrid Meeting

Tuesday • December 14th 2021 • 6 – 8 PM

Location: IN PERSON OR VIRTUAL

In Person: OLD TOWN MARKET PUB & BREWERY

6959 SW Multmomah Blvd, Portland

Virtual: **ZOOM LINK**

Meeting ID: 856 3531 6319

Passcode: 148795

Itinerary:

6PM – 7PM Social Hour!

7 PM – Virtual Presentation

Please RSVP for the meeting and purchase your ticket here: https://www.brownpapertickets.com/event/5322679


The Missoula Floods and the Channeled Scabland

Presented by: Jim O’Connor, U.S. Geological Survey

The U.S. Pacific Northwest has been fertile ground for understanding ice-age megafloods, including observations by Thomas Condon himself. Floods from a variety of sources affected the Columbia River and its tributaries but the largest, best known, and perhaps most spectacular were the Missoula floods. At the close of the last ice age, 15,000-20,000 years ago, a lobe of ice flowing south from Canada blocked the Clark Fork River in northern Idaho and western Montana. The resulting ice-dammed lake, known to geologists as Glacial Lake Missoula, was at times more than 2,000 feet deep and contained 500 cubic miles of water—20 times the size of Puget Sound. The ice dam ruptured and reformed dozens of times, each break-out sending torrents of water across eastern Washington and down the Columbia River. The flood waters were in places 1,000 feet deep and flowing at 30 or 40 miles per hour, lifting boulders the size of automobiles and tumbling them downstream. With such force, these humongous floods instantaneously shaped the landscape of the Pacific Northwest by carving the Channeled Scablands, shaping the Columbia River Gorge, depositing bars of sand and gravel 100s of feet high, and backfilling broad valleys with silt and clay. But the floods also shaped the science of geology. When these floods were first proposed by early geologist J. Harlen Bretz, such catastrophes were loathed by geologists confined by an intellectual framework of slow gradual processes shaping the planet over millions of years. The debate raged for decades, with many twists and turns. In the end Bretz prevailed, but surprising findings continue to emerge, challenging our understanding of one of the greatest natural events in earth history.

Speaker Bio: Jim O’Connor

Jim O’Connor is a Pacific Northwest native long interested in the processes and events that shape the remarkable and diverse landscapes of the region. Following this interest with a Geological Science major at University of Washington and M.S. and Ph.D. degrees at University of Arizona, he has spent the last 30 years, mostly with the U.S. Geological Survey, focused on understanding the geology of the U.S. Pacific Northwest.


Message from the Chair

Holiday Greetings, AEG Oregon Chapter!

Your Board wishes you a happy holiday season! We hope you can join us, remotely or in-person, on Tuesday, December 14th for Dr. Jim O’Connor’s “The Missoula Floods and Channeled Scablands” talk.

Our November virtual meeting went very well with a round-the-world landslide talk from Dr. John Clague discussing several recent catastrophic landslide disasters. He spoke from the epicenter of relentless atmospheric rivers in Vancouver B.C., and associated secondary impacts like widespread flooding and landsliding, which effected major transportation corridors. Perhaps we will get an update from recovery in B.C. in the near future.

In the New Year, we will continue the tradition of a joint meeting with our ASCE colleagues, with a talk by Orion George, Scott Anderson, and Denny Capps, from FHWA and NPS, respectively, on the Pretty Rocks Landslide in Alaska. Please save the date: evening of January 25th.

Some administration news: with continuing education credits now relevant to Oregon RGs and CEGs, we are keeping record of virtual attendance. The best way for us to do this is to have folks sign into a Zoom account when they join the Chapter meeting via a Zoom link. Zoom accounts are free and you do not need to register for the AEG meeting in advance. This step allows us to have a reliable record of attendees we can keep in order to distribute CEU certificates via email, as well as providing a digital archive. We appreciate your help in the effort to provide folks CEU certificates. To reiterate, the onus lies on the registrant to keep track of continuing education credit activities, but AEG Oregon wants to support this effort in whatever way possible. Do reach out with any feedback.

It’s almost AEG renewal time! Please consider renewing your membership or joining for the multitude of benefits membership bestows. And hey- students! It’s free for you! AEG Membership webpage.

Wishing you a healthy and safe end of 2021- and best wishes for a prosperous 2022!

Nancy Calhoun
AEG Oregon Chapter Chair


Interested in presenting for the oregon chapter?

The Oregon Chapter is looking for great topics and presenters to provide content to share with the chapter. As we continue to navigate the virtual world, we will be holding the next foreseeable meetings through webinars. We currently have opportunities to present in November and December. Please consider presenting your exciting project to the Oregon Chapter. We look forward to hearing from all of you and especially appreciative of those willing to present to the Chapter. If you are interested in presenting please feel free to contact any board member. Our contact information is at the end of the newsletter.


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