| 11. | In contrast, lava from the summit flowed over pyroclastic rocks and lava flows of the explosive phase.
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| 12. | The oldest exposed sequence is the Ol Njorowa pantellerite formation of pyroclastic rocks, lava flows and plugs.
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| 13. | The Canadian portion of the field is dominated by scattered remnants of upper Cenozoic subaerial lavas and pyroclastic rocks.
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| 14. | Pyroclastic rocks are often the result of volcanic debris, such as bombs and tephra, and other volcanic ejecta.
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| 15. | These volcanic pipes are genetically associated with the rhyolitic, pyroclastic rocks that cover the whole southern part of Antiparos.
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| 16. | In addition felsic pyroclastic rocks are very common in places and one sandstone-conglomerate lava flow can be found.
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| 17. | It is a stratovolcano, composed of many layers of lava alternating with hardened volcanic ash and other pyroclastic rocks.
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| 18. | Pyroclastic rocks may be a range of clast sizes, from the largest agglomerates, to very fine ashes and tuffs.
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| 19. | The main volcanics at Hoodoo Mountain are phonolite and comendic trachyte lavas and hyaloclastites, although some pyroclastic rocks also exist.
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| 20. | The pyroclastic rock and the base surge deposits form an ash volcanic cone, while the ash covers a large surrounding area.
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