Flow banding in rhyolite, Yellowstone volcanic series. One of the primary things to determine about a volcanic rock is whether it was a lava flow, pyroclastic flow, or ash fall. There are numerous features that can help distinguish these from one anoth… https://t.co/HJXZqsWuv6 pic.twitter.com/MKlg7ZOirq
— ccarrigan (@GeosciImaging) August 1, 2018
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August 01, 2018 at 10:35PM
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