Sharing the Fascinating Ice Age Floods Story Since 1995
The Puget Lobe w1ll meet November 6, 2023 via Zoom (https://us02web.zoom.us/j/82985244730) for Scott Burns to present "Ice Age Floods throughout the Quaternary. Don't forget the older ones." Keyword is the "older ones" - older than our "recent Fraser" Missoula Floods (18Kya-15Kya). Scott will tell you how to identify the deposits.
On 08Jan2024 the Puget Lobe Chapter has Guest Lecturer Dr. Vic Baker presents "Ice Age Floods Around the World". This presentation will be a "Zoom" (URL https://us02web.zoom.us/j/82985244730. And in-person at Bellevue College Bldg R, Rm R103. see map in separate post. There are approximately 24 mega-floods referenced on the maps, of which, #4 is probably the Missoula Floods and outwash from the "Atwater"(#9) and Lake Bonneville (#5) outburst floods. (index unavailable) Known ice-age mega-floods (red arrows and numbers) for the northern hemisphere (polar view). Blue areasindicate the extent of glacial ice and purple areas show mega-lakes at the time of the ice-age flooding.
(21Feb2024) We have invited Ralph Haugerud, USGS to give a talk in "wasting of the Southern Margins of the Cordilleran Ice sheet" on March 18,2024. Please note that this date has moved the Chapter Meeting to 18 March 2024. Or the third week of March. While we don't have the details yet, I bet it will be more than a review of the Mima Mounds.  Our new location is Bellevue College, Bldg R, Rm103, 3000 Landerholm Circle SE, Bellevue, WA 98007-6484. See our website for directions/parking. For this meeting only, there will be NO presentation by zoom,
From Wikipedia Glacial Lake Missoula is most commonly invoked as the sole source of water to form the Channeled Scabland. However, early work by Bretz (and others) suggested more direct contributions of meltwater from the Cordilleran Ice Sheet to explain formation of some Scabland flood tracts. In some cases, these contributions may have been subglacially routed. This presentation will examine new research on Moses Coulee - one of the more enigmatic Scabland coulees – that suggests subglacial meltwater flows best explain the erosional patterns of the coulee and its perplexing lack of connectivity to other Scabland flood routes. Further, the presentation will examine new evidence for proglacial (Mega) floods during deglaciation of the Cordilleran Ice Sheet that may also contribute to formation of flood features such as giant bars along the Columbia River Valley. The presentation highlights the need for greater integration of Cordilleran Ice Sheet hydrology in the interpretive framework of the Channeled Scabland. As a workup to this presentation please familiarize yourself with the IAFI News article, "Moses Coulee: Unveiling the Mystery of a Colossal Ice Age Scar", that gives an overview on this subject. Dr. Jerome Lesemann obtained his PhD from Simon Fraser University. He currently teaches in the Earth Science Department at Vancouver Island University in Nanaimo, BC. His research interests are in Quaternary geology and sedimentology with a focus on glacier processes and ice sheet hydrology. He has had an interest in the Channeled Scabland for over two decades, with a particular focus on the dynamics of the Cordilleran Ice Sheet along the northern reaches of the Channeled Scabland. Date: 20 May 2024 at 7:00pm Location: Bellevue College, Bldg. R, Rm. 103 or click on Zoom link: https://us02web.Zoom.us/j/82985244730
On 07 Oct 2024 the Puget Lobe Chapter will have Dr. Karin Lehnigk, Postdoctoral Researcher at Georgia Tech, who has studied the Channel Scablands in Eastern Washington by performing cosmogenic nuclide exposure dating on Missoula flood transported-boulders to determine what path they took at different points in time. It will be a very informative lecture with new information. Think Mars and Himalayan Mountains. Cosmogenic nuclide dating is a method used to estimate the age of rock exposure at the Earth’s surface. It relies on the interactions between cosmic rays and nuclides in glacially transported boulders or eroded bedrock. By measuring nuclide concentrations, scientists can determine the age of landforms ranging from a few hundred years to tens of millions of years. It looks like a crust or rind on surface of the sample when you cut or break a sample open. (Micrsosoft Bing) Presentation will be at Bellevue Collage, Bldg R, Rm 11o or click on Zoom link: https://us02web.Zoom.us/j/82985244730
Ice Age Floods Institute is a registered non-profit educational organization devoted to publicly sharing the ice age floods story.
All article images on this website are used under Creative Commons license for educational purposes only and no profit is derived.
Visit us at Facebook, Mastodon and our YouTube Channel.
Ice Age Floods Institute is a 501(c)(3) tax-exempt non-profit EIN 91-1658221
Donations and member fees may be tax deductible
Refund and Returns Policy Privacy Policy Terms and Conditions
