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phreatic |
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phreatic [frē′ad·ik] (geology) Of a volcanic explosion of material such as steam or mud, not being incandescent. 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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| This does not apply to phreatic eruptions (bulk-interaction steam explosivity and contact-surface steam explosivity), as shown by Wohletz (2003), nor is it applicable to magmatic pyroclastic eruptions. The groundwater basins are recharged directly from rainfall on the outcroppi ng geologic formations in the West Bank mountains (forming the phreatic portion), while the greatest part of the storage areas is located in the confined portions. A year later came blasts of steam and ash, or phreatic eruptions. |
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