Day #99 Deskcrop: Mirrorlike Slickensides in Slate

Without a doubt this is one of my favorite deskcrops. It’s a piece of maroon slate of the Metawee Formation that has a slickensided surface that is polished to a high, mirrorlike shine. Rarely have I found such a naturally polished rock surface – even less commonly as the result of a structural process.

Slickensided Surface in Slate – Oblique View

Light Reflects Off the Mirrorlike Slickensided Surface

Once again, I’m uncertain of the exact slate quarry where I collected this one during undergrad field camp, so I’m locating the placemark in a random quarry in the general field area that I mapped.

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