blister cave

geology

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Last updated

June 22, 2026

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Blister caves are small geological formations created when trapped steam or other gases lift layers of still-molten lava. These cavities are dome-shaped chambers, typically ranging from one to a few meters in diameter, and can be found in large numbers within lava flows rich in volatile components. They are a type of lava cave, distinct from larger lava tubes formed by the draining of molten rock from beneath a solidified crust. Blister caves are primarily found in volcanic regions, with notable occurrences in the Pacific Northwest of the United States and Hawaii.12

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Other types of lava caves
…plastic state to form small blister caves. These cavities consist of dome-shaped chambers somewhat resembling those of spatter cones. They are generally small, ranging from one to a few metres in diameter, but they often occur in great numbers in many lava flows rich in volatile components.
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…plastic state to form small blister caves. These cavities consist of dome-shaped chambers somewhat resembling those of spatter cones. They are generally small, ranging from one to a few metres in diameter, but they often occur in great numbers in many lava flows rich in volatile components.
Read More