I go back to the woods, along a rocky trail following a creek bed. We start at the top of the Cumberland Plateau, our feet on what is known as the Sewanee Conglomerate: Sandstone, full of pebble populations: bits of quartz known among rock-geeks as clasts. It’s sedimentary rock, and I’m told that as rock goes, it’s “intellectually accessible.”
We soon l…
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