Sharing the Fascinating Ice Age Floods Story Since 1995
The source of the massive flood waters responsible for J Harlan Bretz’s 1922 “Outrageous Hypothesis” of catastrophic floods having carved the central Washington basin, was not generally recognized until Joseph Pardee’s 1940 publication of his research on Glacial Lake Missoula.
Pardee described ancient wave-cut benches, giant megaripples and many other features that indicated a giant lake had once occupied much of western Montana, and that the lake had drained catastrophically through Eddy Narrows, directly into the area of central Washington that Bretz described.
IAFI’s Glacial Lake Missoula Chapter has placed a number of “high water markers” around the area of the lake, and is actively collaborating with other local organizations to tell the story of Glacial Lake Missoula and the Ice Age Floods.
IAFI’s Glacial Lake Missoula Chapter serves the greater western Montana area
Chapter Meetings
We meet the third Wednesday of the month as needed at the Montana Natural History Center, 120 Hickory Street in Missoula. Contact Jennifer Robinson at (406) 327-0405 or email glm@montananaturalist.org for more meeting or event information.
E-mail or call Jim Shelden (406) 728-1860 for more information about the chapter
Please see the Events Calendar for a listing of all chapter meetings and events.
We’re reaching out to ask for your help. As we work toward our mission of promoting public awareness and education
Two glacial erratics in the Bitterroot Valley, the Lone Rock School erratic and the Rome Lane erratic, were deposited during
One of Montana’s other floods has been tickling the curiosity of some of our members.. This grew into a desire
A field trip to Sandpoint ID to visit geologic sites related to the ice dam(s) that blocked the Clark Fork
In the early days, the IAFI and National Geologic Trail were mainly good intentions and lacking in ways to communicate
An 8 ton erratic left behind by Glacial Lake Missoula in the Bitterroot Valley on the property of a local
Upcoming IAFI Events
Upcoming Chapter Events
Ice Age Floods Institute is a registered non-profit educational organization devoted to publicly sharing the ice age floods story.
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Ice Age Floods Institute is a 501(c)(3) tax-exempt non-profit EIN 91-1658221
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