Gary Klitzman: Do we look at glaciers as kind of like you talked about them being like metamorphic rock. Are they not a little bit more like plastic with the deformation and the way that they will crevice and then they'll start to move?klitzman: Yes. It is especially deep down in the glacier where, you know, the deformation is kind of constant. That's because the ice or snow at that level is a lot more brittle. But dying in the base of the glacier, it's much more like a plastic than anything else really. You need those crevasses so we can dig out the dead cavemen.