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During the final uplift, the river cut through the Cambrian and Algonkian strata, and into the Granite Gorge as we find it to-day, and the process is still slowly going on. During these various periods of uplift, there were other changes occurring.
Arrived at the river, spend a day there investigating the peculiar foldings and tiltings of the Algonkian strata. Sleep, as did Powell and his men for weeks, on the sands of the Colorado River, with the noise of the rapids ever in your ears. Breathe the pure air, and watch the solemn march of the stars.
It is composed of strata of dull buff, very different from the brilliant reds almost crimsons of the Algonkian, and the bright reds of the strata which later were to rest above them. Geological Terms. What an audacious science this geology is!
The latter remarks with amazement on the perfectly natural appearance of these Algonkian limestones resting in seeming conformability on Cretaceous shales, and says that the line of separation between them, called in the theory the "thrust plane," resembles in all respects an ordinary stratification plane.
These strata, therefore, are of immense interest to the geologist, as they are the first known rocks containing life to emerge from the primeval sea. Within the last few years, they have been called the Algonkian Series, and later I shall speak of them more freely.
In North America alone we have more than seventy-five seventy-five stocks of people speaking seventy-five stocks of language, and some single stocks embracing many distinct languages and dialects. The languages of the Algonkian family are as diverse as the Indo-European tongues.
All these volcanic mountains can be seen from Hopi or Yavapai points, near El Tovar. The Algonkian Strata. The Algonkian strata of the Grand Canyon are by far the most interesting; Major Powell was the first to call attention to their existence in his report of explorations of 1869-1872, and he discusses their origin and history as far as was possible with the small amount of data he had at hand.
Ask of the folds, or, flexures, in the strata, which the untrained eye can readily discern! The Algonkian. This is one of the spots that all geologists from every part of the civilized world aim for. They know it is one of the rare things of the known world, and they come here to see it. So make yourself as wise as you can while you are here and have the chance. Read Dr.
At the close of this epoch, however, the Algonkian strata had been eroded almost away, owing to its tilted condition, so that in some places even the surface of the Archaean was exposed, and suffered the planing-down process.
The return ride up the Red Canyon Trail is made enjoyable by the brilliant colorings, the faultings and nonconformities of the strata, which are apparent even to the most undiscerning layman. Here the conglomerate appears above the blue limestone, while ordinarily it is found below it. The Algonkian also is largely in evidence. Across the river one may see the location of the asbestos deposits.
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