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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. In order to do this, Archimedes had to estimate the size of the universe according to the contemporary ...
Psammophytes of three different species in the Sahara desert. A psammophyte is a plant that grows in sandy and often unstable soils. Psammophytes are commonly found growing on beaches, deserts, and sand dunes.
In USDA soil taxonomy, a Psamment is defined as an Entisol which consists basically of unconsolidated sand deposits, [1] often found in shifting sand dunes but also in areas of very coarse-textured parent material subject to millions of years of weathering.
Each group comprises psammites and pelites, that's to say sandstones and mudstones which have been subjected to low grade metamorphism. Lavas, tuffs and volcaniclastics also occur through the Southern Highland Group [1] whilst meta-limestone and quartzites are to be found within the Argyll Group. [2]
The hills are formed for the most part from late Precambrian age metamorphosed sandstones and mudstones; quartzites, psammites, pelites and semipelites which together form the Ladder Hills and Kymah Quartzite formations.
The succession is considered to be 7–8 km thick and composed of psammites and semipelites and quartzites. The lowermost (i.e. oldest) strata within the group (overlying the rocks of the Badenoch Group) are meta-limestones and pelites, referred to at one time as the Ord Ban Subgroup but now referred to as the Grantown Formation and placed ...
A psammophile (/ ˈ (p) s æ m oʊ f aɪ l / (P)SAM-oh-fyle) [1] is a plant or animal that prefers or thrives in sandy areas. Plant psammophiles are also known as psammophytes.They thrive in places such as the Arabian Peninsula and the Sahara [2] and also the dunes of coastal regions.