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sedimentary rock, rock formed at or near Earth’s surface by the accumulation and lithification of sediment (detrital rock) or by the precipitation from solution at normal surface temperatures (chemical rock).
Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place.
What Are Sedimentary Rocks? Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks. Clastic sedimentary rocks form from the accumulation and lithification of mechanical weathering debris.
Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms. They form from deposits that accumulate on the Earth's surface. Sedimentary rocks often have distinctive layering or bedding.
Sediments are fragments of rocks, minerals, organic material, and even chemical precipitates that have been weathered and eroded from pre-existing rocks and then deposited in different environments, such as rivers, oceans, deserts, and lakes.
Sedimentary rocks develop in beds or strata that are layers of rocks with a uniform lithology and texture. Common sedimentary rock structures include bedding, ripple marks, fossil tracks and trails, and mud cracks.
Sedimentary rocks are one of the three major types of rocks found on Earth, alongside igneous and metamorphic rocks. They are unique in their formation process, which involves the deposition, compaction, and cementation of sediment.