1956 Map of Obsidian Butte, 1957 Print
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1956 Map of Obsidian Butte

USGS Topo · Published 1957

About this map

Obsidian Butte rises above the southeastern shore of the Salton Sea in this 1950s survey of the Imperial Valley. This volcanic landmark stands as a distinct geological feature within the surrounding Salton Sea National Wildlife Refuge, which spans much of the quadrangle. The map captures a specialized landscape defined by complex water management, featuring a dense network of agricultural infrastructure such as Vail Cut Off Drain, Lateral 6, and Lateral 5.


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Map Details

Date Portrayed1956
Date Published1957
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.8 inches

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Source Details

CopyrightPublic Domain