Digital-Desert : Mojave Desert

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Joshua Tree National Park - Mojave Ecozone:
Geology Tour Road:

Squaw Tank

Dikes/Intrusions

The light-colored bands of rock cutting across the monzogranite were formed when molten magma pushed through joints in the rock. Being of a harder material (aplite or pegmatite), dikes as they are called, are more resistant to erosion and weathering, and tend to protrude above the bedrock as low walls.

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> bedrock, erosion, weathering

Dike in Monzogranite

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Digital-Desert : Mojave Desert

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For educational use only; not a travel or safety guide. Copyright (c) Walter Feller, 1995-2026. All rights reserved.

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