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  2. Sedimentary rock - Wikipedia

    en.wikipedia.org/wiki/Sedimentary_rock

    Uluru (Ayers Rock) is a large sandstone formation in Northern Territory, Australia.. Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for "other" sedimentary rocks formed by impacts, volcanism, and other minor processes.

  3. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.

  4. Rock (geology) - Wikipedia

    en.wikipedia.org/wiki/Rock_(geology)

    Sedimentary rocks often contain fossils. Sedimentary rocks form under the influence of gravity and typically are deposited in horizontal or near horizontal layers or strata, and may be referred to as stratified rocks. [16] Sediment and the particles of clastic sedimentary rocks can be further classified by grain size.

  5. Lithology - Wikipedia

    en.wikipedia.org/wiki/Lithology

    The three major rock types are igneous, sedimentary, and metamorphic. Igneous rocks are formed directly from magma, which is a mixture of molten rock, dissolved gases, and solid crystals. Sedimentary rock is formed from mineral or organic particles that collect at the Earth's surface and become lithified. Metamorphic rock forms by ...

  6. Clastic rock - Wikipedia

    en.wikipedia.org/wiki/Clastic_rock

    Rock fragments also occur in the composition of siliciclastic sedimentary rocks and are responsible for about 10–15 percent of the composition of sandstone. They generally make up most of the gravel size particles in conglomerates but contribute only a very small amount to the composition of mudrocks. Though they sometimes are, rock fragments ...

  7. Category:Sedimentary rocks - Wikipedia

    en.wikipedia.org/wiki/Category:Sedimentary_rocks

    Pages in category "Sedimentary rocks" The following 136 pages are in this category, out of 136 total. This list may not reflect recent changes. ...

  8. Sedimentology - Wikipedia

    en.wikipedia.org/wiki/Sedimentology

    Energy: petroleum geology relies on the capacity of sedimentary rocks to generate deposits of petroleum oils. Coal and oil shale are found in sedimentary rocks. A large proportion of the world's uranium energy resources are hosted within sedimentary successions. Groundwater: sedimentary rocks contain a large proportion of the Earth's ...

  9. Facies - Wikipedia

    en.wikipedia.org/wiki/Facies

    The characteristics of the rock unit come from the depositional environment and from the original composition. Sedimentary facies reflect their depositional environment, each facies being a distinct kind of sediment for that area or environment.

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