Pelite (Greek Pelos, Clay) is a descriptive name for a clastic rock with a grain size of less than 1/16mm (originally sand or silt) Examples include slate and mudstone. Greek (el ελληνική γλώσσα or simply el ελληνικά — "Hellenic" is an Indo-European language, spoken today by 15-22 million people mainly Clastic rocks are composed of fragments or clasts, of pre-existing rock. Slate is a fine-grained foliated homogeneous, Metamorphic rock derived from an original Shale -type Sedimentary rock composed of Clay Mudstone (also called mudrock) is a fine grained Sedimentary rock whose original constituents were Clays or Muds Grain size is up The equivalent Latin-derived term is Lutite. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Lutite is any sedimentary Clastic rock with clay or silt grain size less than 1/16 mm (0 Pelite is more commonly used for a metamorphosed sediment. Metamorphism can be defined as the solid state recrystallisation of pre-existing rocks due to changes in heat and/or pressure and/or introduction of fluids i
Pilite is a rarely used name for an altered olivine that has partially pseudomorphically replaced by an assemblage of carbonate–chlorite–actinolite. Pilite can be identified only in a thin section.
Pettijohn [1] 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. Clay is a naturally occurring material composed primarily of fine-grained Minerals which show plasticity through a variable range of Water content, and "Argillite" may also refer to Argillite Kentucky. An argillite (ˈɑrdʒɨlaɪt is a fine-grained Sedimentary rock composed The Greek terms are more commonly used for metamorphosed rocks, and the Latin for unmetamorphosed:
| Texture | Common | Greek | Latin |
|---|---|---|---|
| Coarse | Gravel(ly) | Psephite (psephitic) | Rudite (rudaceous) |
| Medium | Sand(y) | Psammite (psammitic) | Arenite (arenaceous) |
| Fine | Clay(ey) | Pelite (pelitic) | Lutite (lutaceous) |
References
- ^ Pettijohn F. Psephite ( Greek: Psephos, pebble is a Sedimentary Clastic rock with a grain size exceeding 2 mm (0 Rudite is any sedimentary Clastic rock with a grain size exceeding 2 mm (0 This article is about a type of sedimentary rock For the work by Archimedes, Psammites see The Sand Reckoner. Arenite ( Latin Arena, sand is a sedimentary Clastic rock with sand grain size between 0 Lutite is any sedimentary Clastic rock with clay or silt grain size less than 1/16 mm (0 J. (1975), Sedimentary Rocks, Harper & Row, ISBN 0-96-045191-2
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