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1987 Map of Joshua Flats
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1987 Map of Joshua Flats

USGS Topo · Published 1987

About this map

Joshua Flats and the nearby Cowhorn Valley reveal a landscape shaped by mineral exploration and rugged relief along the border of Inyo County. This 1987 provisional survey documents several extraction sites, most notably the Nikolaus Eureka Mine located in the northern hills. The terrain is marked by numerous prospects and isolated quarries, indicating a period where small-scale mining and resource sampling were common across the high desert ridges. Beyond the industrial sites, prominent geographic landmarks such as Lime Hill and a specific Borrow Pit provide spatial context to a region otherwise defined by its sparse settlement and high-altitude valleys. The map serves as a detailed record of the physical land features before more modern transformations, preserving the locations of specific mining claims and the primitive road network that connected these remote operations.

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Map Details

Date Portrayed1987
Date Published1987
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.9 x 26.7 inches

Editions of this 1987 Joshua Flats Map

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

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain