
La Abra Plain dominates this landscape, a sweeping expanse of alluvial desert situated along the international border between Pima County and Sonora. The boundary, marked as the United States of America Estados Unidos Mexicanos, cuts diagonally across the northern portion of the sheet. The terrain is characterized by a complex network of ephemeral desert washes that drain south across the border, revealing the natural hydrology of this arid region. Surveyed by the U.S. Geological Survey, the map provides a precise view of the Public Land Survey System divisions, including t16s r9w and t17s r9w, which help orient researchers to the township and range grid in this sparsely populated desert frontier.
6 named features on this map. Tap any name to fly to it.
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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 · Quitobaquito Springs
USGS Topo · 1:62,500
1963 · Lukeville
USGS Topo · 1:250,000
1964 · Agua Dulce Mts
USGS Topo · 1:62,500
1965 · O'Neill Hills
USGS Topo · 1:62,500