Speleology book recommendation wanted

[Evan G]

So what is this called?

It looks like volcanic tuff, which is found troughout the Copper Canyon area of Mexico & also near here in Yellowstone area.

http://en.wikipedia.org/wiki/Tuff


So it looks like you have a tuff fold

[hewhocaves]

here's another fun fold - this one in gneiss

So, did you have another picture of a fun fold? Or cleavage pictures are always fun.

oh wow.. i totally forgot to put the link in. *sigh* sorry... i blame calculus. (i have a test tomorrow)

I'll try later to see if i can find it, but don't get your hopes up, it was something i just picked up off the net.