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DTSTART;TZID=America/Los_Angeles:20250106T190000
DTEND;TZID=America/Los_Angeles:20250106T203000
DTSTAMP:20260406T221006
CREATED:20241203T050037Z
LAST-MODIFIED:20241222T012354Z
UID:39253-1736190000-1736195400@iafi.org
SUMMARY:Northern Ice
DESCRIPTION:(2 Dec 2024)   Grace Sherwood Winer is a geologist and explorer who has done extensive studies on the melting of glacial ice in the Arctic.  She will present present her work on the islands of Svalbard and Iceland at our meeting on 06Jan2025 at 7:00pm at Bellevue College\, Building B\, Room 104.  Note room change! This will be an In-person lecture and livecast via Zoom. \nClick on Zoom link:   https://us02web.Zoom.us/j/82985244730 \nBellevue College\, Bldg B\, Rm 104
URL:https://iafi.org/event/northern-ice/
LOCATION:Bellevue College Building T Room 117\, 3000 Landerholm Cir SE\, Bellevue\, WA\, 98007\, United States
CATEGORIES:Activity,All IAFI,Lecture,Meeting,Puget Lobe
ORGANIZER;CN="Puget Lobe Chapter":MAILTO:pugetlobe@iafi.org
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20250116T184500
DTEND;TZID=America/Los_Angeles:20250116T200000
DTSTAMP:20260406T221006
CREATED:20250112T190525Z
LAST-MODIFIED:20250112T190525Z
UID:39611-1737053100-1737057600@iafi.org
SUMMARY:Richard B. Waitt - The "Debacle Which Swept the Columbia Plateau" 100 years on
DESCRIPTION:J Harlan Bretz\n“It was a debacle\,” wrote J Harlan Bretz in 1923\, that carved Washington’s Channeled Scabland. This prescient finale today brings to mind debacles geologic\, personal and periodic. \nThe cataclysm in Bretz’s “Spokane flood” initiated a famous controversy. Published arguments against great Scabland flood erupted in the 1920’s and raged on into the 1940’s–critics by various more conventional schemes calling for less water over more time. As Bretz had almost no published support\, it seemed to many his personal debacle. Yet re-reading the early reports\, and recently the summary field notes\, I sense that by the extraordinary field evidence he had documented throughout the region\, Bretz knew all along that his ‘catastrophysm’ would prevail. After J.T. Pardee showed in 1942 that huge glacial Lake Missoula had discharged abruptly. Bretz and colleagues in 1956 show with the old evidence–and with stark new evidence in giant current dunes adorning many gravel bars–that water from glacial Lake Missoula had indeed carved the ‘Channelled Scabland’. With detailed geomorphic field evidence they skewer Bretz’s critics–this in turn becoming their personal debacle. \nwaittThe story takes a more gradualistic turn with discovery that Lake Missoula drained periodically. In his final Scablands paper in 1969\, Bretz\, by geomorphic evidence counts seven floods at most. But hardly a decade later\, new stratigraphic evidence was showing that Lake Missoula released scores of giant floods during the last glaciation alone. These outbursts were both periodic and gigantic by degrees\, truly colossal and coming decades apart when the damming Purcell Trench lobe was thick\, but as the ice gradually thinned diminishing to coming only a decade or a few years apart\, and at the end one year apart. This ‘jokulhlaups’ idea erupted new controversy\, this one also lasting more than two decades. If it has simmered down lately\, this argument is also being settled by field evidence. \nIf Missoula floods were numerous and periodic during last-glacial marine-Isotope stage 2 (25-15 thousand years ago)\, what happened during seemingly equally deep glaciations of AR-isotope stages such as 6 and 12 (140-440 thousand years ago)? So far we know of no supporting field evidence–only scattered field sites that suggest one gigantic flood far back\, perhaps a million years ago. It will be for today’s young scientists to decipher this and other remaining enigmas. \nThursday\, January 16\, 2025\, In Person 6:45PM PST\nTualatin Heritage Center\, 8700 SW Sweek Drive\, Tualatin\, OR 97062\nALSO Simultaneous Live ZOOM from THC if you cannot attend the in-person THC meeting yourself.\nClick here for Zoom meeting\, Meeting ID: 869 4651 3479 Passcode: 322382.
URL:https://iafi.org/event/richard-b-waitt-the-debacle-which-swept-the-columbia-plateau-100-years-on/
LOCATION:Tualatin Heritage Center\, 8700 SW Sweek Drive\, Tualatin\, OR\, 97062\, United States
CATEGORIES:Lower Columbia,Meeting,Presentation
ATTACH;FMTTYPE=image/jpeg:https://iafi.org/wp-content/uploads/Richard-Waitt-1.jpg
ORGANIZER;CN="Lower Columbia Chapter":MAILTO:LowerColumbia@iafi.org
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DTSTART;TZID=America/Denver:20250129T190000
DTEND;TZID=America/Denver:20250129T200000
DTSTAMP:20260406T221006
CREATED:20241219T014823Z
LAST-MODIFIED:20241219T020015Z
UID:39294-1738177200-1738180800@iafi.org
SUMMARY:New Interpretations of Old Strandlines
DESCRIPTION:It’s that time of the year! Time to contemplate ice ages and glacial lakes. Time for the Glacial Lake Missoula Chapter of the Ice Age Floods Institute’s Cabin Fever Lecture!  Warm up your curiosity about those iconic strandlines we can see from town with a lecture from renowned geologist James W. Sears. \nNew “LiDAR ” mapping techniques may imply that the famous Lake Missoula strandlines on Mount Sentinel and Mount Jumbo record only one draining of the ice-age lake. The draining coincided with massive erosion at the bottom of the lake\, but passive lowering of lake level at the top\, marked by short-term strandlines cut a few inches into thin colluvial soil on the mountainsides. \nAbout the Instructor: Dr. James W. Sears received his PhD from Queen’s University\, Canada\, in 1979\, and has taught at the University of Montana since 1982. \nThis is a live event that will not be recorded or streamed.
URL:https://iafi.org/event/new-interpretations-of-old-strandlines/
LOCATION:Montana Natural History Center\, 120 Hickory Street\, Missoula\, MT
CATEGORIES:Lecture,Missoula,Presentation
ATTACH;FMTTYPE=image/jpeg:https://iafi.org/wp-content/uploads/Strandlines-green.jpeg
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