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pyroclastic flow |
Also found in: Wikipedia, Hutchinson | 0.06 sec. |
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pyroclastic flow [¦pī·rə¦klas·tik ′flō] (geology) Ash flow not involving high-temperature conditions. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Pyroclastic flow deposits from boiling-over eruptions are commonly less depleted in fine material, reflecting the reduced interaction with water during flow movement (McPhie et al. When the hot ash in ground-hugging pyroclastic flows sweeps across glaciers, it can melt prodigious amounts of ice and snow. If Rainier erupts, lava or pyroclastic flow shouldn't reach far beyond the boundaries of Mount Rainier National Park, explains Willie Scott, head scientist at the Cascades Volcano Observatory in Vancouver, Washington. |
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