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Sedimentary rock, rock formed at or near Earth’s surface by the accumulation and lithification of sediment or by the precipitation from solution at normal surface temperatures. Sedimentary rocks are the most common rocks exposed on Earth’s surface but are only a minor constituent of the entire crust.
- Sedimentary Rock Types
Sedimentary rock - Clastic, Chemical, Organic: Conglomerates...
- Classification Systems
Sedimentary rock - Classification, Deposits, Types: In...
- Limestones and Dolomites
Sedimentary rock - Limestones, Dolomites, Calcite:...
- Iron-rich Sedimentary Rocks
Sedimentary rock - Iron-Rich, Clastic, Chemical: Almost all...
- Classification of Sandstones
Sedimentary rock - Clastic, Chemical, Organic: There are...
- Sedimentary Structures
Sedimentary structures are the larger, generally...
- Oil and Natural Gas
Sedimentary rock - Oil, Natural Gas, Formation: Natural gas...
- Evaporites
Sedimentary rock - Evaporites, Deposits, Minerals:...
- Sedimentary Rock Types
A rock can be defined as a solid substance that occurs naturally because of the effects of three basic geological processes: magma solidification; sedimentation of weathered rock debris; and metamorphism. As a result of these processes, three main types of rock occur:
22 Οκτ 2024 · Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form recognizable and mappable volumes. The three major classes of rock are igneous, sedimentary, and metamorphic rock.
Sandstones are siliciclastic sedimentary rocks that consist mainly of sand-size grains (clast diameters from 2 to 1/16 millimetre) either bonded together by interstitial chemical cement or lithified into a cohesive rock by the compaction of the sand-size framework component together with any interstitial primary (detrital) and secondary (authige...
24 Αυγ 2024 · Chemical Sedimentary rocks are precipitated from water that contains a very high concentration of dissolved elements, or ions. We usually classify these chemical rocks based on the precipitated minerals or whether biological processes play a role in the rock’s formation.
11 Απρ 2024 · Following deposition, the sediment is buried, compacted, and cemented together to form solid rock. We call these processes “diagenesis,” and collectively they serve to lithify the sediment into a rock.
They often consist of sand, pebbles, minerals and mud that’s been removed from the land by erosion, carried by rivers or blown by the wind and eventually deposited. Sediments are usually deposited in seas and lakes but they can also accumulate in desert environments.
