Diatremes with Kimberlitic Affinities in North-Central Montana

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Science  09 Feb 1968:
Vol. 159, Issue 3815, pp. 622-625
DOI: 10.1126/science.159.3815.622


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.