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1942 Map of Oro Blanco

Name: 1942 Topographic Map of Oro Blanco
Creator: U.S. Geological Survey
Published: 1961
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1961

About this map

Mining heritage and ranching life define this borderland landscape in the early 1940s, where the San Luis MTS and Cobre Mtn rise above the international boundary. The settlement of Oro Blanco serves as a focal point for the region's extractive history, surrounded by numerous dormant operations including the Yellow Jacket Mine, Old Glory Mine, and the Austerlitz Mine. These labels suggest a shift in the local economy as older claims were recorded as abandoned by the time of the survey.

Deep canyons such as Warsaw Canyon and Mojonera Canyon cut through the Coronado National Forest, providing drainage into ephemeral washes like Canoa Wash. Isolated outposts like Garcia Ranch and Tres Bellotas Ranch represent the cattle ranching interests that shared this arid terrain with the mining industry. The map meticulously tracks the winding boundary between the United States and Mexico, marked by landmarks like Cerro del Fresnal and Bartlett Mtn along the Arizona-Sonora line.