Litchfield, Isaac W, Massachusetts Institute of Technology. Society of Arts · Boston, Mass. : The Society · leaf 28
many localities stone of varying hardness. This varia- of the southwestern United States where tion in hardness renders the successive cliff dwellings occur. One may walk or layers variable in their resistance to ride the eight miles from the railroad weathering, the more resistant remaining… … are divided tom of the Walnut Canyon, 350 feet deep, and the pine-clad rolling into separate gorge and in upland into which it is cut each groove dwellings by artificial walls, dividing it into separate transverse walls built out from the back to the front of the cave. compartments . The geologic…
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