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

Abstract
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.