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When this happens the existing rocks temperature rises and also becomes infiltrated with fluid from the magma. It is convenient to distinguish several general types of metamorphism in order to simplify the description of the various metamorphic phenomena. Contact metamorphism normally happens round intrusive igneous rocks, and is the end result of temperature growth associated with the introduction of warm magma into the colder u . The three main types of metamorphism are: Contact (also known as thermal) metamorphism: this is produced by high temperature, low pressure, low strain and variable fluid pressure. Types of Metamorphism Contact Metamorphism- This type of metamorphism occurs locally adjacent to the igneous intrusion; with high temp. Types of metamorphic processes. Many altered rocks of this type were formerly called hornstones, and the term hornfels is often used by geologists to signify those fine grained, compact, non-foliated products of contact metamorphism. Contact Metamorphism Contact metamorphism occurs adjacent to igneous intrusions and results from high temperatures associated with the igneous intrusion. Contact Metamorphism occurs when magma comes in contact with an already existing body of rock. pressures, arising at the contacts in this way, Contact Metamorphism: A type of local, thermal metamorphism caused by the intrusion and extrusion of magmas; takes place in rocks at or near their contact with a body of igneous rock. Hydrothermal metamorphism Because contact metamorphism is not caused by changes in pressure or by differential stress, contact … Origin of metamorphic rocks: types of metamorphism. Caineng Zou, in Unconventional Petroleum Geology, 2013 (2) Contact Metamorphism and Rock Type. rences of contact metamorphism of Type 6 may. 1.Contact Metamorphism. All of these factors vary widely and result in different types of metamorphism depending upon which factor is dominant. When a rock is contact altered by an igneous intrusion it very frequently becomes more indurated, and more coarsely crystalline. Types of metamorphism. The three types of metamorphism are Contact, Regional, and Dynamic metamorphism. Types of Metamorphism. There are two main types of metamorphism: Contact metamorphism—occurs when magma contacts a rock, changing it by extreme heat (Figure 4.14). Rocks. The process where one type of rock changes into metamorphic rock because of chemical processes or changes in temperature and pressure Define contact metamorphism. Recognized here are hydrothermal, dynamic, contact, and regional metamorphism, each of which will be described in turn. Regional metamorphism—occurs when great masses of rock change over a wide area due to pressure exerted on rocks at plate boundaries. apparently be formed under various depth con-ditions, predominantly at about 7-10 km. 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