Vegetation Change and Arroyo Cutting in Southeastern Arizona During the Past Century: An Historical Review.

Figure 7b: Charleston, 1959, looking south toward Bronco Hill. Photo taken from the same spot as Figure 7a. Arrows indicate hills on which white thorn acacia has replaced grassland.

From:
James Rodney Hastings, Institute of Atmospheric Physics, The University of Arizona.
Vegetation Change and Arroyo Cutting in Southeastern Arizona During the Past Century: An Historical Review.
In Arid Lands Colloquia 1958-1959.University of Arizona.

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