Wednesday, August 10, 2011

Who can possibly resist...

peering into a freshly excavated hole? Certainly not a geologist!

While running errands around town yesterday I noticed these enormous sub-rounded basalt boulders piled adjacent to a stormwater retention basin for a new subdivision in Cheney, Washington (click to enlarge):
These gigantic clasts were likely saltating particles in the Missoula outburst floods that swept across eastern Washington, scouring the Channeled Scablands, at the end of the Pleistocene.  Here's a better indication of scale:

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