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Peperite

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About PeperiteHide

Name:
The name refers to the original description of a rock in Limagne, appearing to contain ground pepper. This original peperite ( described as “peperino”) is probably actually a pyroclastic, not a true peperite (Skilling et al, 2002).
The term ‘peperite’ or ‘Pépérite’ is most commonly used to refer to breccias, clastic rocks comprising both igneous and sedimentary components, which were generated by intrusive processes, or along the basal contacts of lava flows or hot volcaniclastic deposits with unconsolidated, typically wet, sediments (Skilling et al, 2002). It usually consists of highly irregular fragments of glassy igneous rock within sediments and/or the opposite. The Le Maître et al. (2002) definition is: "A local term for a tuff or breccia, formed by the intrusion of magma into wet sediments” (not a normal use of the word tuff). In contrast with tuffs and pyroclastic rocks, formed by explosive volcanism, it forms essentially in situ by disintegration of magma intruding and mingling with typically wet sediments. It can grade into hyaloclastite and unaltered sediment. Chilled and bleached margins on volcanic clasts are typical, and clasts can vary from blocky to fluidal. The textures may be due to quenching, hydromagmatic explosions, magma-sediment density contrasts, and mechanical stress as a consequence of inflation or movement of the magma.




Classification of PeperiteHide

Synonyms of PeperiteHide

Other Language Names for PeperiteHide

References for PeperiteHide

Reference List:
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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press
Skillinga, I.P. , White, J.D.L., McPhie, J. (2002) Peperite: a review of magma-sediment mingling. Journal of Volcanology and Geothermal Research 114, 1-17.

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