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zones, followed by shear and annealing of the fragments. Fiamme can also result from patchy alteration and recrystalisation of volcanic rocks, or by patchy
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are lens-shapes, usually millimetres to centimetres in size, seen on surfaces of some volcaniclastic rocks. They can occur in
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or pumice. But this is not the only way they can form: they can also form when pumice lapilli are altered to
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ejecta, often pumice lapilli that have been flattened by compaction and/or
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170: – size, shape and mutual relations of the particles of a rock
69:, describing their shape. The term is descriptive and non-genetic.
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95:. Some fiamme are formed from flattened hot, relatively low
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Fiamme in the
Resting Spring Tuff near Shoshone, California.
193:"Apparent welding textures in altered pumice-rich rocks"
115:; and fiamme are also widely reported in viscous lavas (
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Pages displaying wikidata descriptions as a fallback
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Small lens-shaped inclusions in volcaniclastic rocks
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191:Gifkins, C.G.; Allen, R.L.; McPhie, J. (2005).
197:Journal of Volcanology and Geothermal Research
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39:on left; compressed with fiamme on right.
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123:) where they form by shear-induced
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72:Fiamme are most typical of welded
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217:10.1016/j.jvolgeores.2004.10.012
65:comes from the Italian word for
48:welded pyroclastic fall deposits
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164: – Type of volcanic rock
59:pyroclastic density currents
54:, which are the deposits of
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307:Igneous petrology stubs
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162:Ignimbrite
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302:Petrology
121:rhyolites
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150:See also
146:tuffs).
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205:Bibcode
99:, high
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67:flames
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