Voila! My thesis:
39ar 40ar al area ash biotite caldera composition contains continental creek deposits diagram eruption et feldspar fiamme field figure fish flow formed indicates lake magma matrix melt monroe osiris peak phenocrysts plagioclase plateau probably range results rims samples sanidine section subduction surface thick thin trachyte unit utah values volcanic welded
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Fish were a very prominent feature. (No, not mica fish. I like things that go or went boom, remember.)
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2 comments:
I saw "fish" and "lake" and looked for "tuff"...
Kind of strange it didn't come up, isn't it? I think I didn't use it so much because everyone who was studying the volcanics there wanted to classify them based on geochemistry. But the Osiris is, indeed, a tuff.
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