| 1. | These plains are superposed by explosive vents associated with pyroclastic material.
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| 2. | Since then heavy rains have frequently remobilised pyroclastic material, generating lahars.
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| 3. | On the eastern flank, lava flows are buried beneath pyroclastic material.
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| 4. | Its slopes range 11 16? formed by lava flows and pyroclastic material.
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| 5. | Explosively erupted pyroclastic material is called tephra and includes tuff, agglomerate and ignimbrite.
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| 6. | There are pyroclastic materials in foundry slag and coal mining waste in the watershed.
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| 7. | Some pyroclastic material of the same age as Devils Tower has been identified elsewhere in Wyoming.
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| 8. | Pyroclastic material with particles less than 2 mm in diameter is referred to as volcanic ash.
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| 9. | Several fans of pyroclastic material, cemented by andesitic tuffs, surround the base of Taftan.
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| 10. | Since the 1815 eruption, the lowermost portion contains deposits of interlayered sequences of lava and pyroclastic materials.
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