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Igneous Structures and Field Relationships - Faculty web pages

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<strong>Structures</strong> <strong>and</strong> <strong>Field</strong> <strong>Relationships</strong><br />

Figure 4-8. 4<br />

Pressure ridges on the surface of Big Obsidian Flow, Newberry Volcano, V<br />

OR. Flow direction is toward the left.<br />

© John Winter <strong>and</strong> Prentice Hall.

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