Diatremes with Kimberlitic Affinities in North-Central Montana

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...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1968-02, Vol.159 (3815), p.622-625
Main Author: Hearn, B. Carter
Format: Article
Language:English
Subjects:
Breccia
Geology
Igneous rocks
Magma
Mica
Olivine
Peridotite
Pyroclastic rocks
Rocks
Ultramafic rocks
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Summary: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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.159.3815.622