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Show Fignro 72.- Bird'tHye vi6w ~of tl 0 - r . - -,= b' d · 10 rnnd C !i ·"'" 1 " "'tr s, l<utlmb l'lulcnu. Tltrco 1 latoau. bu. .d s, To-uro 'o-wn,c luopo k( .i;nli~tl ioi. nstF foruorm t.h o G r fUul ~nKh. Ouo hircl , J<:oho Cl iflii. T wo b •nll', llurncn no Lcclgo. Five birds, Sh i-vwitH FAULTS AND FOLDS. 187 So we have selected, for purposes of discus ion here, six great displacements- the P aria Fold, the Eastern I(aibab Fault, the Western K.aibab F ault, the To-ro' -wcap Fault, the Hnrricano Lodge Fault, and the Grand Wash Fault. Lot us review them in reverse order, and examine the lines of cliffs to which they give rise, and tho table lands which they divide. (See bird's-eye view, Figure 72.) We will start at the Grand Wash, half a dozen miles north of the river. llere the summit of tho Carboniferous rocks is deeply buried beneath sandstones and shales of later origin. At tho start we are but five or six hundred feet above tho level of the Colorad , and we elimb by a gentle slope several miles in longtlt, until wo reach an altituuo of six or eight hundred feet above the starting point, and are at tho foot of the Grand Wash CliH's. Now we must climb this great wall, one thousand five hundred or one thousand eight hundred feet high; no caRy task, as it is not a mountain slope, up which we can walk, but a wall, broken somewhat with gulches, and sot with narrow benches, or shelves, here and there, and up some one of those gulches and along tho narrow shelves we pass, until we reach the summit of the first great terrace. Still we go a short distance to the east, and must climb another thou-sand feet, or more, and we are on the Shi' -wits Plateau 'rhis last escarpment of a thousand feet is not due to a fault, but is a line of cliff's formed by erosion. On tho plateau there is a dead volcano, and from its crater have poured floods of basalt in great sheets, which now stand as a central and higher table on the plateau. We go on to tho east thirty miles. It is not an easy way, but we stop not here to describe it, ~tnd we arrive at the foot of the Hurricane Ledge. We have descended a little, for the Shi'-wits llateau inclinef, or dips, from its western margin to the foot of this ledge, or line of cliffs. 'fhe Hurricane Ledge is more than two thousand feet high, and we have another Lard climb. It is related that a storm overtook a party of Mormon officials while attempting to explore a route for a wagon road up a gulch which comes down from the upper country, and hence its name, llurricane Ledge. I t presents a bold, precipitous wall to the west, which forms, along its entire course, an impassable barrier to the traveler, except that here and |
