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Psammite (Greek: psammitēs "(made) from sand", from psammos "sand") [1] is a general term for sandstone. It is equivalent to the Latin-derived term arenite [ 2 ] [ 3 ] and is commonly used in various publications to describe a metamorphosed sedimentary rock with a dominantly sandstone protolith . [ 4 ]
A pelite (from Ancient Greek πηλός (pēlós) 'clay, earth') [3] 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 ...
The Lower Psammite is divided into the lower Altnaharra Psammite Formation, with the Glen Achall Semipelite Member at the top, and the upper Glascarnoch Psammite Formation. The Vaich Pelite Formation is the equivalent of the Morar Schists and the Crom Psammite Formation is matched to the Upper Psammite.
This group , which consists dominantly of psammite with local developments of quartzite, lies above the Glenfinnan Group in what is interpreted to be a normal stratigraphic contact. The upper boundary of this group is not seen, with Old Red Sandstone typically found unconformably above it. In contrast to the Glennfinnnan Group, there are well ...
Arenite (from the Latin arena, "sand") [1] is a sedimentary clastic rock with sand grain size between 0.0625 mm (0.00245 in) and 2 mm (0.08 in) and containing less than 15% matrix. [2] The related adjective is arenaceous. The equivalent Greek-derived term is psammite, though this is more commonly used for metamorphosed sediments.
The geology of Norway encompasses the history of Earth that can be interpreted by rock types found in Norway, and the associated sedimentological history of soils and rock types. The Norwegian mountains were formed around 400 million years ago (Ma) during the Caledonian orogeny .
In geology, metasedimentary rock is a type of metamorphic rock. Such a rock was first formed through the deposition and solidification of sediment. Then, the rock was buried underneath subsequent rock and was subjected to high pressures and temperatures, causing the rock to recrystallize. The overall composition of a metasedimentary rock can be ...
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...