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What does PARENT ROCK mean? PARENT ROCK meaning - PARENT ROCK definition - PARENT ROCK explanation. What is the meaning of PARENT ROCK? What is the definition of PARENT ROCK? What does PARENT ROCK stand for? What is PARENT ROCK meaning? What is PARENT ROCK definition?

Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.

Parent rock, also referred to as substratum, refers to the original rock from which something else was formed. It is mainly used in the context of soil formation where 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 shale while sandy soil comes from the weathering of sandstones. The term is also used in the context of metamorphic rocks where again the parent rock or protolith refers to the original rock before metamorphism takes place. Parent rocks can be sedimentary, igneous or metamorphic.