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1990 Map of Porcupine Butte

Name: 1990 Topographic Map of Porcupine Butte
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

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.

The map captures the intersection of the Shasta National Forest and Modoc National Forest, a region defined more by its geological landmarks than by human settlement. While largely wild, the area includes small nodes like Lakin and several cinder pits, indicating intermittent industrial use. Landmarks like Porcupine Butte and Snell Butte serve as prominent navigational points above the small waters of Porcupine Lake.