Hanging Canyon hike, part 5
(Parts 1, 2, 3 & 4 of this series...)
Today we'll look at some of the structural geology photos I took in Hanging Canyon, Teton National Park, Wyoming. These are all rocks of the Archean-aged Wyoming Terrane (or "Wyoming Craton"), one of the most ancient pieces of crust that make up the quilt-like North American continent. They include both metamorphic and igneous rocks that have beensuffered enjoyed being deformed by tectonic processes.
Today we'll look at some of the structural geology photos I took in Hanging Canyon, Teton National Park, Wyoming. These are all rocks of the Archean-aged Wyoming Terrane (or "Wyoming Craton"), one of the most ancient pieces of crust that make up the quilt-like North American continent. They include both metamorphic and igneous rocks that have been
Z-fold of felsic dike in amphibolite:
Doubly-folded fold (again, felsic dike cutting across amphibolite):
Squiggles #1: Calculate the shortening here!
Squiggles #2:
Is this a sheath fold? Pete and I convinced ourselves that it was... but I've never seen a sheath fold in the field before, so I wonder if we interpreted it correctly.
Kind of cool: "the Cheerio effect." Chopping a fold axis with a little notch produces an "O" shaped outcrop...
Folded boudins!
Folded boudins!
Big boudin (where's my sense of scale?*) with Z fold (at the bottom):
*Width of photo is about 1 meter.
I've got two more structure pictures that call for more discussion, but I'll save those for a special structure episode tomorrow...
Labels: archean, igneous, metamorphism, national parks, nova, structure, travel, wyoming
1 Comments:
great pictures and great hat!
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