Moses Coulee Megafloods


The Wenatchee Valley Erratics, Ice Age Floods Institute’s next ZOOM program will be on Tuesday, October 12 at 7:00 PM. Joel Gombiner, PhD candidate at U. of Washington will discuss “Moses Coulee Megafloods.” 

Moses Coulee is unique from other Scabland canyons because it lacks an obvious tie-in to the Columbia River. It heads in the middle of the Waterville Plateau, but lacks clear feeder channels or flood-scoured surfaces that link to the Columbia River. How did it get there? How was it formed? And when?

Using field observations and laboratory analyses of rocks and minerals transported by the megafloods, Joel will present new, unpublished data using megaflood deposits in the Coulee that suggest it formed before the last glaciation, that it flooded prior to the Grand Coulee during the last glaciation, and that Lake Missoula was a flood source for at least some, but not all, Moses Coulee floods. ZOOM link:

Western Scablands