pélite - translation to french
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pélite - translation to french

PELITIC SEDIMENTARY ROCK FAMILY; OLD TERMINOLOGY, CLAYEY SEDIMENTARY ROCK
Pelitic; Semipelite; Metapelite; Pelites; Metapelites; Meta-pelite; Meta-pelites

pélite      
n. pelite

Definition

pelite
['pi:l??t]
¦ noun Geology a sediment or sedimentary rock composed of very fine clay or mud particles.
Origin
C19: from Gk pelos 'clay, mud' + -ite1.

Wikipedia

Pelite

A pelite (Greek: pelos, "clay") or metapelite is a metamorphosed fine-grained sedimentary rock, i.e. mudstone or siltstone. The term was earlier used by geologists to describe a clay-rich, fine-grained clastic sediment or sedimentary rock, i.e. mud or a mudstone, the metamorphosed version of which would technically have been a metapelite. It was equivalent to the now little-used Latin-derived term lutite. A semipelite is defined in part as having similar chemical composition but being of a crystalloblastic nature.

Pettijohn (1975) gives the following descriptive terms based on grain size, avoiding the use of terms such as clay or argillaceous which carry an implication of chemical composition. The Ancient Greek terms are more commonly used for metamorphosed rocks, and the Latin for unmetamorphosed: