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Devils Postpile Columns and Rubble<br> Natural Monuments in California--Northern picture - This picture shows both the basalt columns and the rubble that occurs as individual columns fall down and break over time. Wyoming's Devils Tower is a well-known example of this type of formation.
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This picture shows both the basalt columns and the rubble that occurs as individual columns fall down and break over time. Wyoming's Devils Tower is a well-known example of this type of formation.
North America
