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All 3 types of rocks, sedimentary, igneous and metamorphic have been known to form rapidly
I'm interested in the evidence for this - I can't seem to find much.
Obviously igneous can cool/form quickly, and I supposed at least contact metamorphism can happen fast. Can you point me to a link to support this claim? It would be quite useful for me.
I reverse engineering your photo link and read the Sunday Stone story - fascinating. Like Varves.
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