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2015 Map of Joaquin Rocks

Name: 2015 Topographic Map of Joaquin Rocks
Creator: U.S. Geological Survey
Published: 2015
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2015

About this map

Joaquin Rocks towers over a landscape of steep canyons and ridges within the Diablo Range in Fresno County. This 2015 survey details the complex topography of the western edge of the San Joaquin Valley, where the land rises sharply into Anticline Ridge and Joaquin Ridge. The drainage patterns are defined by seasonal watercourses like Martinez Cr and Domengine Cr, which have carved out deep features such as Portuguese Canyon and Horsethief Canyon.

Insights into the local geology and history are preserved in names like Oil Cr and Oil Canyon, pointing to the region's industrial ties, while cattle ranching and early homesteading are suggested by labels such as Double Trough Spring and Domengine Spring. The map also identifies distinctive landmarks such as Donut Rock and the high points of the Big Blue Hills, providing a clear view of this sparsely settled section of California's coastal range.