Peloncillo Mountains dominate the eastern reaches of this borderlands quadrangle, where the arid landscape is defined by its history of extraction. Numerous claims and excavations are scattered throughout the hills, including the Mineral Mountain Mine and smaller sites like the Little Lucile Mine and Dewey Prospect. This industrial footprint suggests a period of intense interest in the geological richness of the mountains, while the lower desert floor is shaped by ephemeral watercourses such as the San Simon River and Vanar Wash.
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1917 · San Simon
USGS Topo · 1:125,000
1926 · Orange Butte
USGS Topo · 1:62,500
1928 · Chenoweth
USGS Topo · 1:62,500
1950 · San Simon
USGS Topo · 1:62,500
1950 · Vanar
USGS Topo · 1:62,500
1951 · Vanar
USGS Topo · 1:62,500
1951 · San Simon
USGS Topo · 1:62,500
1954 · Silver City
USGS Topo · 1:250,000
1958 · Silver City
USGS Topo · 1:250,000
1962 · Silver City
USGS Topo · 1:250,000