Las Playas occupies the central focus of this arid landscape, where ephemeral water patterns define the geography of the borderlands. The presence of the Pinacate Lava Flow in the northwest corner signals the volcanic origins and geological complexity of this desert environment, marking a distinct transition in terrain. Drainage patterns are dominated by the Papago Wash, which meanders across the eastern portion of the quadrangle. This 2011 survey, produced by the U.S. Geological Survey, captures the stark hydrography of the region during a period when modern digital mapping standards were being applied to some of the most remote stretches of the international boundary. The map serves as a precise record of seasonal water bodies and geological boundaries that have influenced travel and subsistence in this desert corridor for generations.
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This is the sole edition of this map. No revisions or reprints were ever made.
1953 · Ajo
USGS Topo · 1:250,000
1954 · Sonoyta
USGS Topo · 1:250,000
1957 · Ajo
USGS Topo · 1:250,000
1958 · Ajo
USGS Topo · 1:250,000
1962 · Ajo
USGS Topo · 1:250,000
1963 · Ajo
USGS Topo · 1:250,000
1963 · Lukeville
USGS Topo · 1:250,000
1965 · O'Neill Hills
USGS Topo · 1:62,500
1965 · Sierra Arida
USGS Topo · 1:62,500
1967 · Ajo
USGS Topo · 1:250,000