| 1. | These islets are remnants of eroded volcanic tuff rings.
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| 2. | Moffitt Butte is a dissected basaltic tuff ring, in diameter and high.
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| 3. | Each maar is surrounded by a tuff ring high.
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| 4. | It has a 600 m wide explosion crater, with a surrounding tuff ring.
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| 5. | It has an explosion crater around 700 m wide, with a surrounding tuff ring.
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| 6. | The crater is surrounded on most sides by a 30 m high tuff ring / cone.
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| 7. | This eruption at first formed a tuff ring, within which the lava dome was emplaced.
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| 8. | This first cone is lengthened to the north by the trachyandesite tuff ring which caused its obstruction.
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| 9. | In addition, they also occur in nested clusters in association with complex tuff ring and maar complexes.
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| 10. | Tuff rings, pyroclastic cones of primarily ash, are built by explosive disruption of rapidly cooled magma.
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