Yellowstone caldera and supervolcano.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...o_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...pervolcano.jpg
Previously:
https://www.homemadetools.net/forum/...074#post207376
https://www.homemadetools.net/forum/...583#post212484
https://www.homemadetools.net/forum/...970#post207039
https://www.homemadetools.net/forum/...344#post192496
https://www.homemadetools.net/forum/...864#post220584
