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volcanic neck |
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volcanic neck [väl′kan·ik ′nek] (geology) A residual remnant of the pipe or throat of a volcano that was filled with solidified lava after its final eruption. 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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| Aside from Cargill's vast phosphate deposit near Kapuskasing (which is refined into fertilizer), Cosec knows of no other producers in the Sudbury basin for the simple reason these rocks are hard to find in volcanic necks, as are diamonds. These diamond occurrences are spatially associated with discrete magnetic and/or radiometric (potassic) anomalies interpreted to be related to intrusive volcanic neck or diatreme structures. |
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