many hundreds of feet higher and the rocks are chiefly variegated shales of beautiful colors....ΓÇ¥
Powell the scientist, Powell the great explorer of the unknown, could he even begin to imagine what colossus of concrete and steel would soon take shape deep in this labyrinth? Perhaps a moment of uncertainty gripped him as the wooden boats glided across the exact spot. Perhaps a sense of silence above the sound of the river whispered of great changes to come. Perhaps he merely floated on, unknowing.
