Day #78 Deskcrop: Black Slate with Framboidal Pyrite

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.

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Black Hatch Hill Slate

Turn the sample on its side to reveal a small fold nose.

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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?

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Pyrite Framboids with Pressure Shadows

Explore this and all of my 2010 Deskcrops and Outcrops in Google Earth!

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