One of the features is a lava cast forest -- what happens when lava flows into a forest of substantial trees. The lava hardens and cools when it hits a tree, and I suspect that the result is pretty darn amazing to watch as it burns to charcoal. But it leaves casts of the trees in the lava, like these:
Here is a picture of the lakes that formed in the multi-part caldera (formed from several collapses over a long period of time):
There are several massive obsidian flows in the caldera -- like 150 feet thick and miles long. Here's the face of one of them:
My wife has an obsidian obsession, and here she is mugging for the camera, expressing her desires, restrained only by federal law and gravity:
Love this piece:
I'd never heard of it either. I knew about the lava tubes, but wasn't aware if they were part of a larger monument.
ReplyDeleteThe area around Sisters is very volcanic, with lots of, I guess you'd call it ejecta; pumice, scoria, and some heavier rock that was frothy but too dark and too heavy to be pumice.