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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 ]
The Sand Reckoner (Greek: Ψαμμίτης, Psammites) is a work by Archimedes, an Ancient Greek mathematician of the 3rd century BC, in which he set out to determine an upper bound for the number of grains of sand that fit into the universe.
The Altnaharra Psammite is interpreted to have been deposited as a prograding braid plain, with fluvial deposition being replaced by shoreline deposits that were tidally influenced, before a deeper marine environment developed during the deposition of the Vaich Pelite Formation. This is interpreted to be a single progradation-retrogradation cycle.
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 ...
Arenite. 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]
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 ...
The Southern Highland Group is a sequence of metamorphosed Neoproterozoic sedimentary rocks that outcrop across the Central Highlands of Scotland, east of the Great Glen.It forms the uppermost/youngest part of the Dalradian Supergroup and is divided into two formations.
The lithology of this subgroup varies across Scotland but is dominantly limestone though this is replaced in the east by psammite and quartzite. Lavas and pelites are seen around Tayvallich in Knapdale, after which area the subgroup is named, where it consists of the Tayvallich Slate and Limestone Formation and the overlying Tayvallich Volcanic ...