evohr.org > trips > Lassen > Subway Cave

« previous | next » 12 of 12
Finally, remember those bubbling mud pots at Bumpass Hell? They reminded us a lot of these "lava bubbles" at the far end of the cave.

As you can see, at least five concentric bubbles of lava rippled up through the floor here before the entire agglomeration hardened.

© 2000-1, the evohrs