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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 used to identify the original sedimentary rock, even where they have been subject to high-grade metamorphism and intense deformation.[1]

Types of metasedimentary rocks

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Sedimentary rock Metamorphic equivalent
Pure Limestone Marble[2]
Impure (Silica or clay-rich) Limestone Calc–silicate rock[2]
Mudstone Pelite
Siltstone Semi-pelite
Sandstone Psammite, Quartzite[2]
Conglomerate Metaconglomerate
Shale Slate

See also

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References

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  1. ^ Vernon, R.H. & Clarke, G.L. 2008. Principles of metamorphic petrology, Cambridge University Press, 460pp.
  2. ^ a b c Arndt, Nicholas (2011). "Metasediments". Encyclopedia of Astrobiology. Springer, Berlin, Heidelberg. pp. 1021–1022. doi:10.1007/978-3-642-11274-4_973. ISBN 978-3-642-11271-3.


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Lewisian complex

these metasediments to be of Paleoproterozoic age, similar to the rocks of the Loch Maree Group. The relationship between these metasediments and Scourian

Hadean

electron micrograph of detrital zircons from the Hadean (4.404 ± 0.008 Ga) metasediments of the Jack Hills, Narryer Gneiss terrane, Western Australia

Guiana Shield

coincides with Guiana Island. The rocks of the Guiana Shield consist of metasediments and metavolcanics (greenstones) overlain by sub-horizontal layers of

Phyllite

of its commercial uses. Phyllite is commonly found in the Dalradian metasediments of northwest Arran. In north Cornwall, there are Tredorn phyllites and

Puigmal

ridge over 2500m high for 16 km. The west half is composed of friable metasediments (schists) which break down to form smooth slopes, and so give easy walking

Salton Buttes

Xenoliths found in the volcanic rocks include granite, granophyre, metasediments, and tholeiite, often heavily altered by interactions with the volcanic

Copperbelt

shales, to the youngest, upper most Kundelungu Group including glacial metasediments and a cap carbonate. The Katanga Supergroup correlates with rocks of

Moinian

Moine, formerly the Moine Supergroup, is a sequence of Neoproterozoic metasediments that outcrop in the Northwest Highlands of Scotland between the Moine