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1990 Map of Porcupine Butte
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1990 Map of Porcupine Butte

USGS Topo · Published 1990

About this map

Burnt Lava Flow Geological Area dominates the northern reaches of this Siskiyou County landscape, revealing a volcanic terrain marked by numerous craters and subterranean formations. Volcanic activity has shaped the local geography, evident in features such as Double Hole Crater and Deep Crater. Below the surface, the presence of the Deep Ice Caves and the Jot Dean Ice Cave suggests a unique geothermal and climatic environment where ice persists within basaltic structures.

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Map Details

Date Portrayed1990
Date Published1990
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.9 x 26.7 inches

Editions of this 1990 Porcupine Butte 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