draft - EXPLORING HOW THE GRAND CANYON ENDS - draft
From the Westernmost High Point, the view sweeps down and out, over the Sanup Plateau, reaching its farther edge some seven miles west where it drops 3500' in 1 1/2 - 2 miles to the water surface (of the reservoir or river, depending). That drop is a geological lesson, as shown in this piece of the 1982 edition of the stupendous, irreplaceable map done in the 1970's by Peter Huntoon and George Billingsley. (For orientation, keep track of that triangular flat in the middle at the top.)
