Shades of Brown (all) : Photographs from The Writing of Stones by Roger Caillois (1970)
Two friends sent me these links on the same day. So astonishingly wonderful it made me very happy.
"Life appears: a complex dampness, destined to an intricate future and charged with secret virtues, capable of challenge and creation. A kind of precarious slime, of surface mildew, in which a ferment is already working. A turbulent, spasmodic sap, a presage and expectation of a new way of being, breaking with mineral perpetuity and boldly exchanging it for the doubtful privilege of being able to tremble, decay, and multiply."
http://50watts.com/#2045815/The-Writing-of-Stones
http://butdoesitfloat.com/2045616/There-are-impossible-scribblings-in-nature-written-neither-by-men