Oooh, that's a good source. I wasn't going to be much help, I think about them on a larger spacial scale and wouldn't be able to say much about the properties within a single slab. Soapstone and serpentine and a lot of those types of rocks often form within fault zones and even "lubricate" the fault zones somewhat, we think. A lot of geophysics work today is figuring out how those types of rocks behave when you press on them for really long timescales that we can't replicate in the lab. Very cool stuff. |