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Journal of the Geological Society; 1990; v. 147; issue.6; p. 919-922;
DOI: 10.1144/gsjgs.147.6.0919
© 1990 Geological Society of London

SHORT PAPER

Fiamme formed by diagenesis and burial-compaction in soils and subaqeuous sediments

M. J. BRANNEY1 & R. S. J. SPARKS2

1 Department of Earth Sciences, University of Liverpool, PO Box 147, Liverpool L69 3BX, UK
2 Department of Geology, Wills Memorial Building, University of Bristol, Bristol BS81RJ, UK

Pumice clasts can be diagenetically altered at low temperature and flattened by compaction to form fiamme. Examples are described from trachytic pumice fall layers alternating with palaeosoils on Sao Miguel in the Azores and from Ordovician lacustrine volcaniclastic sedimentary rocks from the English Lake District.