Tuesday, April 14, 2009

Garnet, Staurolite, and other Miscellaneous Schist

Yesterday, my friend and I went to Henry's Lake near Island Park, Idaho, just west of Yellowstone. The alluvial fans along the north shore's mountain front are rich with metamorphic mineral and rock samples.
This road-cut is a prime garnet-collecting site.
Here's a sample of the variety of metamorphosed pelitic rock present at this site.
Here's the road-cut that contains abundant staurolite (from the Greek "Stauros" meaning "cross") samples.
There was also a good amount of tremolite present at both sites.

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