I stumbled today on Kim Hannula’s delightful blog, in particular her post about hiking with her four-year-old son:
He pointed to something that looked like white hairs on an over-excited yeti. Fibrous ice crystals, holding up pebbles and leaves and bits of frozen dirt. Every shadowed spot was covered with them, when we stopped and looked. On the hillsides, on the trail… everywhere.
They looked, actually, like vein fillings – fibrous vein fillings. Perhaps I shouldn’t be surprised – ice is, after all, a mineral, if one that melts readily under earth’s surface conditions. And like fibrous veins, I think I could figure out a deformational history from some of them.
(P.S. If you know of any other good geology blogs, mention ’em in the comments.)