The Grand Canyon Of Arizona: How To See It By George Wharton James






































































































































 -  Arrived at the top of this, the downward descent begins again, until
another ridge of these slightly tilted strata appears - Page 131
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Arrived At The Top Of This, The Downward Descent Begins Again, Until Another Ridge Of These Slightly Tilted Strata Appears, See Figure 3 Of Plate Facing Page 99.

Thus he continues up into Utah, and south and east into Arizona.

Now, in imagination, restore these cliffs of Permian, Triassic, Jurassic and even Cretaceous strata over the whole Canyon platform. Figure 4 of plate facing page 99.

Red Butte, which is the prominent landmark seen from the railway on the right, when going from Williams to the Canyon, is said to be a remnant of the Permian.

Deposition of Strata in Shallow Water. It is, I believe, generally accepted by the geologists that the accumulation of much of the sediments of the Cambrian, Carboniferous, Permian, Triassic, Jurassic and Cretaceous periods took place in shallow water, and that the sea bottom slowly sank under the weight of the increasing deposits. Hundreds, thousands of years must have elapsed during the process, for the indications are that the sinking did not exceed a few inches every hundred years! As carefully measured, these sediments then amounted to about two miles. Imagine, then, these Cambrian rocks, that at El Tovar are clearly seen above the "granite" or Archaean, sunk in the ocean, to the depth of two miles, and covered over with the various strata, the topmost of which was barely above sea level at periods of low tide.

Cretaceous Uplift. Then began another epoch of uplift. Slowly the Cretaceous rocks emerged from the sea, and were subject to the fierce attacks of nature that produce erosion.

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