What type of metamorphism would a rock at location A be subjected to? Which type of metamorphism is most likely produced in this environment? Impact Metamorphism. Regional Regional or Barrovian metamorphism covers large areas of continental crust typically associated with mountain ranges, particularly those associated with convergent tectonic plates or the roots of previously eroded mountains. Regional Metamorphism: A type of metamorphism that affects an extensive region, as opposed to local metamorphism that is effective only in a relatively restricted area. Plutonic Metamorphism 6. Types of Metamorphism: Regional Associated with Mountain buildings Also known as Dynamothermal - produces both foliated and non-foliated metamorphic rocks. The various types of foliated metamorphic rocks, listed in order of the grade or intensity of metamorphism and the type of foliation are slate, phyllite, schist, and gneiss (Figure 7.8). NPS photo by Tim Connors. As already noted, slate is formed from the low-grade metamorphism of shale, and has microscopic clay and mica crystals that have grown perpendicular to the stress. Regional metamorphism is associated with the major events of Earth dynamics, and the vast majority of metamorphic rocks are so produced.They are the rocks involved in the cyclic processes of erosion, sedimentation, burial, metamorphism, and mountain building (), events that are all related to major convective processes in Earth’s mantle. Regional metamorphism—occurs when great masses of rock change over a wide area due to pressure exerted on rocks at plate boundaries. This type of metamorphic was created by regional metamorphism, in which a sedimentary or igneous rock has been deeply buried and subjected to high temperatures and pressures. It is therefore the most widespread and common type of metamorphism. Hydrothermal metamorphism. This involves development of large-scale changes in the structural and chemical constitution of the pre-existing rocks under the combined action of pressure, temperature and fluids. Foliated metamorphic gneiss. Types of Metamorphism: Produces non-foliated, granoblastic rocks: Hornfels (if clastic - shale) Quartzite (if sandstone) Marble (if carbonate) 19. Regional metamorphism. Conditions producing widespread regionally metamorphosed rocks occur during an orogenic event. Foliated Metamorphic Rocks . Type # 1. Regional Metamorphism 4. The three main types of metamorphism are: Regional Metamorphism. Contact Metamorphism. Regional metamorphism is a type of metamorphism where the formation of a metamorphic rock occurs in a wide area. This type of metamorphism occurs with rocks that are buried deep down the Earth’s crust. The image below shows metamorphism related to the emplacement of an igneous pluton. The collision of twocontinental … This type of rocks are called hornstones while the term hornfel describes the product of this metamorphism. This is also referred as REGIONAL METAMORPHISM and may be considered as the most important as well as prevalent type of metamorphic processes. Burial Metamorphism 5. What is Regional Metamorphism. Regional metamorphism includes any metamorphic process that occurs over a large region. Nearly all traces of the original structures (including fossils) and fabric (such as layering and ripple marks) are wiped out as the minerals migrate and recrystallize. Contact or Thermal Metamorphism: This type of metamorphism takes place when the very hot magma moves up through the crystal rocks and brings with it high levels of heat. dynamothermal or regional metamorphism. There are two main types of metamorphism: Contact metamorphism—occurs when magma contacts a rock, changing it by extreme heat (Figure 4.14). 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