22 July 2011

Friday fold: Pete’s purty pet

Posted by Callan Bentley

That’s my Rockies co-instructor Pete Berquist, in the regulation uniform of an orange down vest, holding a subtly-folded slab of sandstone (it’s a very slight “S”), rescued from amid the shaley wastes of the Blackleaf Formation, the Cretaceous aged sedimentary rocks beneath the Lewis Thrust on the Blackfoot Reservation, just east of Glacier National Park. It’s cool to go check out these strata of the Western Interior Seaway, and see how much more pervasively they are deformed than the massive, stiff Belt Supergroup metasedimentary rocks above the thrust fault.

Happy Friday! I’m setting this to post while I am out on a two-night backpacking trip with my wife to Floe Lake in Kootenay National Park, British Columbia. I’ll check in with you all on Sunday or Monday, when I aim to be in Field, BC, to visit the Burgess Shale and Yoho National Park.