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Updated: June 29, 2025
Then the eye rests upon slopes of talus, which reach down to the red strata of varying thicknesses, which are deposited above the red-wall limestone, the widest member of the whole Canyon group. These walls are cut and recessed into all kinds of shapes and forms, angles, promontories and recesses, which, especially in the early morning and late afternoon, cast shadows of inexpressible beauty.
The Red-Wall Limestone. We now come to the red-wall limestone nearly six hundred feet in thickness. What a striking, massive wall it is, and how impressive, when seen even at this immense distance. This wall is red only because it is stained by the color washed down by the rain from the red strata above.
The trail then winds under Yuma Point, and zigzags down the thinner strata of the red sandstones on to the red-wall limestones, where it affords more extended views on a lower plateau of lesser area, the rocky butte on the end of which is named Bunker Hill Monument.
From this spot a fine view is had of the red-wall limestone below and the Indian Garden; and, far below, at the end of Pipe Creek, the peculiar folding of the Algonkian strata. This folding is also to be seen on the other side of the river in the same rocks. Trees, Flowers and Birds. While descending the first mile of trail, one sees plenty of flowers and shrubs, and many Douglas spruces.
As the plateau passes across the basin and out to the open Canyon, the scene becomes more and more enlarged, until it is stupendous and vast beyond description. Down on the right, Hermit Creek cuts its narrow path deeper and deeper, until it reaches the red-wall limestone, where it makes a narrow gorge, that, from the elevation of the plateau, seems more like a mere slit in the rock than a gorge.
It is Cheops Pyramid, a detached mass of the red-wall limestone, which, however, is rapidly losing its red color, owing to the disappearance of the red strata from above. Cheops is five thousand three hundred and fifty feet in elevation, and is of a peculiar shape, as of some quaint and Oriental device of symbolic significance. Isis and Shiva Temples.
While appearing in the red-wall limestone, the rock of these caves is all of a creamy white, thus demonstrating that the formation itself is white, but that the exposed walls are stained by the red washed over them from the strata above. Copper Mine.
To take this trip, the trail passes the mine, eastward, down a steep break in the red-wall limestone, zigzagging back and forth. Passing under overhanging cliffs, it leads down until the plateau is reached, where twenty years ago I saw bands of mountain sheep.
Here the immense mass of the "red-wall" has been shaken up, and is now rapidly disintegrating, to be washed down by the storms of succeeding years into the great river which will ultimately deposit it in the Gulf of California.
The differences in hardness and resistance to weathering are alone responsible for the step-like profile of cliffs and terraces. The lower platform owes its width entirely to the rapid weathering and recession of the soft shales, which overlie the Tonto sandstones. The red-wall limestone, on the other hand, remains standing out as a cliff because of its exceeding durability. The Faults.
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