Accretionary lapilli in altered tuffs associated with coal beds.

Journal of Sedimentary Petrology
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Accretionary lapilli (concentrically-zoned structures with featureless cores and layered rims, composed of volcanic materials) have been previously recognized in recent volcanic eruptions, and in rocks from obvious volcanic environments. The present paper extends the known occurrences to rocks of less obvious volcanic origin; in some cases the lapilli are the primary evidence for their volcanic origin. They are reported from tonsteins (clay beds associated with coals and generally interpreted as altered tuffs), and clays not associated with coals or previously interpreted as volcanic in origin, (flint in Missouri and Kentucky). -W.P.F.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Accretionary lapilli in altered tuffs associated with coal beds.
Series title Journal of Sedimentary Petrology
Volume 54
Issue 1
Year Published 1984
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Sedimentary Petrology
First page 317
Last page 325
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