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Diatremes with kimberlitic affinities in north-central montana |
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| Authors: | Hearn B C |
| Abstract: | Diatremes in the Missouri River Breaks demonstrate systematic subsidence-ring structure, contain inclusions derived from far above and far below, and have been produced by gas-rich eruptions of alkalic ultramafic magmas. Similar magmas have produced diatremes in many localities in the world and are known to be closely associated with and probably parental to kimberlites. |
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