| 11. | A lava lake formed temporarily between the bottom of the new Pariou and the borders of the tuff ring.
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| 12. | A smaller vent and small tuff ring, in diameter, are located on Moffitt Butte's southwestern flank.
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| 13. | Quarrying has removed the small scoria cone in the crater and some of the tuff ring on the northeast side.
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| 14. | A number of basaltic phreatomagmatic deposits, frequently associated with tuff rings, have a dispersal index of less than.
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| 15. | In contrast to tuff cones, the crater of a tuff ring generally has been excavated below the existing ground surface.
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| 16. | It is across and its drained and sediment-filled flat floor is below the rim of the surrounding tuff ring.
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| 17. | The maximum thickness of the pyroclastic debris comprising the rim of a typical tuff ring is generally thin, less than to thick.
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| 18. | An earlier explosive eruption, created the prominent tuff ring that is still clearly visible extending in an arc south of Sunderlands Road.
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| 19. | This is because the lava flow is " rootless " meaning that it begins outside of the tuff ring directly around the vent.
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| 20. | A small scoria cone reaching above sea level, with a shallow St John's Church built on the tuff ring crest.
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