| Abstract: | 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. |
| Genre: | Article |
| ProdID: | 70013180 |
| Citation Author: | Bohor, B. F.; Triplehorn, D. M. |
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| Citation End Page: | 325 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Sedimentary Petrology |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Accretionary lapilli in altered tuffs associated with coal beds.; 1984; Article; Journal; Journal of Sedimentary Petrology; Bohor, B. F.; Triplehorn, D. M. |
| Citation Start Page: | 317 |
| Citation Volume: | 54 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | Accretionary lapilli in altered tuffs associated with coal beds.; 1984; Article; Journal; Journal of Sedimentary Petrology; Bohor, B. F.; Triplehorn, D. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
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