Sedimentary rock | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-23

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Sedimentary_rock


00:02:40 1 Classification based on origin
00:03:14 1.1 Clastic sedimentary rocks
00:04:11 1.1.1 Conglomerates and breccias
00:04:29 1.1.2 Sandstones
00:06:22 1.1.3 Mudrocks
00:07:25 1.2 Biochemical sedimentary rocks
00:08:14 1.3 Chemical sedimentary rocks
00:08:45 1.4 "Other" sedimentary rocks
00:09:08 2 Classification based on composition
00:11:33 3 Deposition and transformation
00:11:43 3.1 Sediment transport and deposition
00:12:43 3.2 Transformation (Diagenesis)
00:15:49 4 Properties
00:15:59 4.1 Color
00:17:48 4.2 Texture
00:20:16 4.3 Mineralogy
00:22:19 4.4 Fossils
00:25:19 4.5 Primary sedimentary structures
00:29:19 4.6 Secondary sedimentary structures
00:33:37 5 Depositional environments
00:39:17 5.1 Sedimentary facies
00:42:10 5.1.1 Gallery of sedimentary facies
00:42:20 6 Sedimentary basins
00:45:43 6.1 Influence of astronomical cycles
00:47:20 7 Sedimentation rates
00:49:03 8 Stratigraphy
00:50:09 9 Provenance
00:50:53 10 See also



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SUMMARY
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Sedimentary rocks are types of rock that are formed by the accumulation or deposition of small particles and subsequent cementation of mineral or organic particles on the floor of oceans or other bodies of water at the Earth's surface. Sedimentation is the collective name for processes that cause these particles to settle in place. The particles that form a sedimentary rock are called sediment, and may be composed of geological detritus (minerals) or biological detritus (organic matter). Before being deposited, the geological detritus was formed by weathering and erosion from the source area, and then transported to the place of deposition by water, wind, ice, mass movement or glaciers, which are called agents of denudation. Biological detritus was formed by bodies and parts (mainly shells) of dead aquatic organisms, as well as their fecal mass, suspended in water and slowly piling up on the floor of water bodies (marine snow). Sedimentation may also occur as dissolved minerals precipitate from water solution.
The sedimentary rock cover of the continents of the Earth's crust is extensive (73% of the Earth's current land surface), but the total contribution of sedimentary rocks is estimated to be only 8% of the total volume of the crust. Sedimentary rocks are only a thin veneer over a crust consisting mainly of igneous and metamorphic rocks. Sedimentary rocks are deposited in layers as strata, forming a structure called bedding. The study of sedimentary rocks and rock strata provides information about the subsurface that is useful for civil engineering, for example in the construction of roads, houses, tunnels, canals or other structures. Sedimentary rocks are also important sources of natural resources like coal, fossil fuels, drinking water or ores.
The study of the sequence of sedimentary rock strata is the main source for an understanding of the Earth's history, including palaeogeography, paleoclimatology and the history of life. The scientific discipline that studies the properties and origin of sedimentary rocks is called sedimentology. Sedimentology is part of both geology and physical geography and overlaps partly with other disciplines in the Earth sciences, such as pedology, geomorphology, geochemistry and structural geology. Sedimentary rocks have also been found on Mars.