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Sedimentary rocks are formed from the weathering and erosion of pre-existing rocks. This process involves the breakdown of rocks into small particles that are then compacted and cemented together to form sedimentary rocks such as sandstone, shale, and limestone.
Rocks that are commonly formed through weathering include sedimentary rocks such as sandstone, limestone, and shale. Weathering breaks down existing rocks into smaller fragments that can then be transported and deposited to create sedimentary rocks. These rocks often exhibit features like layers or cemented grains due to the deposition process.
The breaking up of rocks into sediments is called weathering. Weathering can be physical (mechanical) or chemical in nature, and it is a key process in the formation of sedimentary rocks.
Clastic sedimentary rocks are formed by the weathering, erosion, deposition, compaction and cementation of other rocks. Chemical sedimentary rocks however may be precipitated directly from saturated solutions (examples incldue the evaporitic rocks and certain types of carbonates such as oolitic limestones). Some other sedimentary rocks may be biogenic in origin (such as the linmestones that are formed of coral reefs).
Detrital sedimentary rocks are made from weathered rocks.