In the earth sciences, parent rock, also sometimes substratum, is the original rock from which younger rock or soil is formed. In soil formation, the parent rock (or parent material) normally has a large influence on the nature of the resulting soil; for example, clay soil is derived from mudstone while sandy soil comes from the weathering of sandstones. Parent rock can be sedimentary, igneous or metamorphic. In the context of metamorphic rocks, the parent rock (or protolith) is the original rock before metamorphism occurred.
Parents for Rock and Rap, founded in 1987 by Mary Morello in the United States, was an anti-censorship campaign which focuses on campaigning for the importance...
non-parent or non-blood relations. Others may be adopted, raised in foster care, or placed in an orphanage. Parenting skills vary, and a parent or surrogate...
parentrock and be found and dated in younger rock formations. In January 2019, NASA scientists reported the discovery of the oldest known Earth rock...
A single parent is a person who has a child or children but does not have a spouse or live-in partner to assist in the upbringing or support of the child...
used to refer to both the soil type and the mineral group which forms its parent materials. Serpentine soils exhibit distinct chemical and physical properties...
They develop by intensive and prolonged weathering of the underlying parentrock, usually when there are conditions of high temperatures and heavy rainfall...
most recently transported. Parent materials that are predominantly composed of consolidated rock are termed residual parent material. The consolidated...
Bernard Marcel Parent (born April 3, 1945) is a Canadian former professional ice hockey goaltender who played 13 National Hockey League (NHL) seasons with...
January 23, 2024. Chiari, Mike (January 23, 2024). "The Rock Becomes Board Member of WWE's Parent Company TKO, Obtains Trademark to Name". Bleacher Report...
melanosome, forms a more or less unmodified remnant of the metamorphic parentrock paleosome. The light-colored components often give the appearance of...
Lithology – Description of its physical characteristics of a rock unit Parentrock – Original rock substratum Petrifaction – Process of fossilisation Weathering –...
the parentrock is chemically and physically weathered, transported, deposited and precipitated, it is transformed into a soil. Typical soil parent mineral...
well. They fall into two groups: residual soil forming in place from parentrock, and soil forming in deep sedimentary deposits. The residual red soils...
word comes from the Greek phyllon, meaning "leaf". The protolith (or parentrock) for phyllite is shale or pelite; or slate, which in turn came from a...
cotton soil. It is believed that the climatic conditions along with the parentrock material are the important factors for the formation of black soil. This...
rock (the leucosome). The leucosome is interpreted as partial melt of a parentrock that has begun to separate from the remaining solid residue (the melanosome)...
most easily erodible parts of the parentrock. If the parentrock is hard, this can cause quite deep erosion of the rock over many years. As this process...
metamorphism a rock has experienced. Depending on the original composition of and the pressure and temperature experienced by the protolith (parentrock), chemical...
aluminum (Al). They may also be a source of nickel and cobalt when the parentrock is enriched in these elements. Banded iron formations (BIFs) are the...
a few regions of Africa, orthents occur in flat terrain because the parentrock contains absolutely no weatherable minerals except short-lived additions...
element (the parent): oya-ko rocks, or "parent-and-child", a pair of rock formations offshore from Samani, Hokkaido, Japan oyakodon, or "parent-and-child...
2018 Steam hit Chinese Parents". Polygon. Retrieved December 1, 2019. Vega, Sin (July 11, 2019). "Wot I Think: Chinese Parents". Rock, Paper, Shotgun. Retrieved...
degrade a rock slope depend largely on the regional climate (see below), but also on the thermal and topographic stresses governing the parentrock material...
metamorphic conditions that produce slate or phyllite, but with the parentrock (protolith) being conglomerate, rather than clay. The metaconglomerates...
minerals in the rock. This work is a part of petrology and helps to reveal the origin and evolution of the parentrock. A photograph of a rock in thin section...
Earth. The minerals present in a granulite will vary depending on the parentrock of the granulite and the temperature and pressure conditions experienced...
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