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pyroclastic flow |
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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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Fiske and Matsuda (1964) were the first to propose that submarine pyroclastic flows can occur in submarine environments. When the hot ash in ground-hugging pyroclastic flows sweeps across glaciers, it can melt prodigious amounts of ice and snow. Dome eruptions, in which a mass of magma builds up over the volcano's vent, generating myriad pyroclastic flows and ash plumes, also increase the hazard because they produce more fine ash and more fine crystalline silica. |
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