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You are browsing the archive for 2011 July 10.

10 July 2011

Cascade Canyon

Following up on Friday’s fold, I wanted to share a few other images from our hike last week in Cascade Canyon of Grand Teton National Park.  Lots of cool exposures of Archean basement rock there. Folds in gneissic banding: Big, angular mafic blocks in a felsic soup: Swarm of granite dikes on a mountainside: Asymmetric feldspathic porphyroclast in amphibolite, with apparent reaction rim: Boudinage and an isoclinal fold: Ptygmatic fold: …

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