Grand Canyon of Arizona : being a book of words from many pens, about the Grand Canyon of the Colorado River in Arizona (1906)
[Place of publication not identified] : Passenger Dept. of the Santa Fe · leaf 75
GEOLOGT OF THE GRAND CANTON. R. D. SALISBURT. … Fig. 5. Section across the Grand Canyon, showing its present relations in full lines, and suggesting, by the dotted line above, the thickness of rock which may have been removed. Fig. 6. A series of sections illustrating the base leveling of a plateau by the widening of the valleys. this old base…
Grand Canyon (Ariz.)
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
