Sedimentary Rock

type of stone having a layered structure and created by a buildup of underwater sediment

Sedimentary rock is one of the three main rock groups (the others being igneous and metamorphic rock). Rock formed from sediments covers 75-80% of the Earth's land area, and includes common types such as chalk, limestone, dolomite, sandstone, conglomerate and shale.Sedimentary rocks are classfied by the source of their sediments, and are produced by one or more of:clastic rock formed from fragments broken off from parent rock, byweathering in situ or erosion by water, ice or wind, followed by transportation of sediments, often in suspension, to the place of deposition; biogenic activity; or precipitation from solution.
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Noun
1. rock formed from consolidated clay sediments
(hypernym) rock, stone
(hyponym) argillite

A rock made from the consolidation of solid fragments, as of other rocks or organic remains, or by precipitation of minerals from solution.

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