For my final slate deskcrop of the week (I’m holding a few in reserve for the future) I present to you the black Hatch Hill Slate. (Or, as Sandra “Boo” would have it: not black, but dark charcoal grey.) The deskcrop below has some nice jointing cutting its slaty cleavage.
Turn the sample on its side to reveal a small fold nose.
Finally, from the same outcrop and very near the deskcrop above we have some rather spectacular musket ball-sized pyrite framboids with spectacular pressure shadows. What do you think of that, structural geologists? Pretty nice, eh?
Explore this and all of my 2010 Deskcrops and Outcrops in Google Earth!