
The Chocolate Mountains dominate this arid landscape in the mid-1950s, defining a region where industrial mining and early transportation infrastructure intersect. Hard rock mining operations are evident at the Black Eagle Mine and Mary Lode Mine in the northern ridges, while the valley floor is characterized by the long diagonal of the Southern Pacific railroad. Small settlements like Acolita and Mesquite appear as stops along this rail line, adjacent to the Niland-Glamis Road.
16 named features on this map. Tap any name to fly to it.
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5 editions found
1903 · Yuma
USGS Topo · 1:125,000
1905 · Yuma
USGS Topo · 1:125,000
1907 · Holtville
USGS Topo · 1:125,000
1940 · Iris
USGS Topo · 1:62,500
1940 · Iris Pass
USGS Topo · 1:62,500
1940 · Alamorio
USGS Topo · 1:62,500
1942 · El Centro
USGS Topo · 1:250,000
1942 · Yuma
USGS Topo · 1:250,000
1942 · Blythe
USGS Topo · 1:250,000
1945 · Alamorio
USGS Topo · 1:62,500