METASEDIMENTARY Meaning and
Definition
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Metasedimentary is an adjective used to describe a type of rock formation that has undergone metamorphism, which is a process where pre-existing rocks are transformed through high pressure, temperature, and chemical reactions. Metasedimentary rocks are derived from sedimentary rocks that have been altered by the intense conditions of the Earth's interior.
These rocks are typically found in regions where tectonic activity, such as mountain-building or plate collisions, has occurred. During metamorphism, the original sedimentary rock undergoes changes in its mineral composition and structure, resulting in a new rock with distinct physical and chemical properties. Metasedimentary rocks often retain some characteristics of their sedimentary origins, such as layering or the presence of fossils, but are transformed into a more crystalline and metamorphic nature.
The formation of metasedimentary rocks can occur through various processes, including regional metamorphism, which affects large volumes of rock over long periods, or contact metamorphism, which occurs when rocks come into direct contact with a magma intrusion. Metasedimentary rocks can exhibit a wide range of textures and compositions, depending on the original sedimentary rock type and the conditions under which it was metamorphosed.
Overall, the term "metasedimentary" refers to the transformation of sedimentary rocks into metamorphic rocks through the process of metamorphism, resulting in a unique rock type with altered properties compared to its original sedimentary state.
Etymology of METASEDIMENTARY
The word "metasedimentary" is derived from two main components: "meta-" and "sedimentary".
1. "Meta-" is a prefix derived from Greek, meaning "change" or "transformation". It is commonly used in scientific terminology to indicate a change in state or transformation of a certain material or substance. In the context of geology, "meta-" denotes the process of metamorphism, which refers to the solid-state changes in rocks due to high pressure, temperature, or other geological processes.
2. "Sedimentary" comes from the Latin word "sedimentum", which means "settling" or "sediment". Sedimentary rocks are formed through the accumulation, compaction, and cementation of various materials such as minerals, shells, plants, and other organic matter. They are typically created over long periods by weathering and erosion of pre-existing rocks, followed by deposition and lithification.
