Originally posted by kaseki
Fascinating, albeit completely mysterious. Is that an undercut limestone hill?
when rainwater suddenly hit hot volcanic ash, the resulting steam was forced straight up, leaving behind evenly spaced vertical channels in the firm ash. Over millennia, the area was submerged and hard minerals filled those channels. At some point, the region became desert and was buried in sand.
Recently, the creation of a dammed reservoir has brought wave action to the feature, eroding away the soft ash to reveal the hardened mineral columns. As such, it is going to keep getting better over time.
Last edited by mikeSF; 09-15-2022 at 06:15 PM.