1986 Map of Middle Mountains South
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1986 Map of Middle Mountains South

USGS Topo · Published 1986

About this map

Yuma Proving Ground dominates this arid landscape, highlighting the military significance of the Sonoran Desert in the late twentieth century. The terrain is defined by the sharp rise of the Middle Mountains, where Round Top Peak serves as a prominent natural landmark overlooking the expansive Castle Dome Plain. This desert environment is etched with numerous drainage systems, most notably Dome Wash and Castle Dome Wash, which cut through the alluvial flats. Military infrastructure and resource extraction are evident across the sheet, including an Observation Tower, a network of pipelines, and several Gravel Pits. The presence of numerous Check Dams along the washes indicates active water management and erosion control efforts in this harsh, dry climate during the mid-1980s.


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Map Details

Date Portrayed1986
Date Published1986
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.8 inches

Editions of this 1986 Middle Mountains South Map

This is the sole edition of this map. No revisions or reprints were ever made.


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Source Details

CopyrightPublic Domain