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1943 Map of Joaquin Rocks

Name: 1943 Topographic Map of Joaquin Rocks
Creator: U.S. Geological Survey
Published: 1943
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1943

About this map

The rugged western edge of the San Joaquin Valley meets the rising foothills of the Coast Ranges in this early 1940s survey. The landscape is defined by the massive sandstone formation of the Joaquin Rocks and the prominent Monocline Ridge, where dramatic topographical changes separate the flat valley floor from the deep incisions of Horsethief Canyon and Urruffia Canyon. This area shows a transition from agricultural land use on the plains to isolated ranching outposts in the higher elevations.

Local industry and early infrastructure are visible through the inclusion of the Mack Pumping Sta, reflecting the importance of water and resource management in Fresno County. Scattered family operations and remote settlements such as Lillis Ranch, Domengine Ranch, and Jordan Ranch provide essential genealogical markers for researchers. The presence of the Cantua Sch and the secluded area known as The Clearing suggest a small but established community presence during the pre-war era.