It is composed primarily of hornblende (amphibole) and plagioclase, usually with very little quartz. - Metamorphic rocks can form from igneous, sedimentary or other metamorphic rocks. Metamorphic rocks are former igneous, sedimentary or metamorphic rocks that have changed their texture and composition. created for 5th grade science classroom. Even rocks, a seemingly constant substance, can change into a new type of rock. AIM: How are metamorphic rocks formed, classified and used? As metamorphic rocks change under heat and pressure, their ingredients recombine into new minerals that are suited to the conditions. Students will investigate the scientific view of how the earth’s surface is formed c. Classify (group) rocks (metamorphic… Cataclasite. Metamorphic processes. Metamorphic rocks can be formed from sedimentary, igneous and even other metamorphic rocks. Peak metamorphic conditions are about 1.1 gigapascals (GPa), or 37 km depth and about 440°C. Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The transformation from the protolith to charnockite had probably no magma phase, which means that in most cases we are dealing with true metamorphic rocks which have nothing to do with igneous processes. Foliated – These have a planar foliation caused by the preferred orientation (alignment) of minerals and formed under differential stress. "Metamorphism takes place in a variety of geologic settings. The most important geological processes that lead to the creation of sedimentary rocks are erosion, … Amphibolite is a non-foliated metamorphic rock that forms through recrystallization under conditions of high viscosity and directed pressure. 2. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Metamorphic rocks When rocks are baked by heat of molten magma or squeezed by the movements of huge tectonic plates or by the pressure of overlying thick succession of rocks They are altered or changed beyond their recognition i.e. Metamorphism – transformation of one rock type into another Metamorphic rocks – produced from pre-existing sedimentary, igneous and metamorphic rocks The concept of metamorphic facies is a systematic way to look at the mineral assemblages in rocks and determine a potential range of pressure and temperature (P/T) conditions that were present when they formed. Slideshow search results for rocks Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The preexisting rocks may be igneous, sedimentary, or other metamorphic rocks. Path B reaches blueschist facies and is then immediately returned to the surface. There are two major subdivisions of metamorphic rocks. For this reason, metamorphic rocks can take on all types of colors and textures. As per Wikipedia, “”Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means “change in form””.The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (1500 bars), causing profound physical and/or chemical change. • Restate how metamorphic rocks relate to the two other rock groups (sedimentary and igneous). Metamorphism ends before the rock leaves the blueschist facies pressure-temperature field. Types of Metamorphism Classification of metamorphic rocks and textur… The standard scientific notation for pressure is expressed in pascals or megapascals (1 pascal is equivalent to 10 bars). Igneous rocks are formed from magma, but charnockites are found in high-grade metamorphic terranes (granulite facies). An Introduction to Metamorphic Rocks "Metamorphic rocks form from other rocks (protolith) by essentially solid-state changes in mineralogy and/or texture as a result of a change in chemical and/or physical environment. Sedimentary rocks are formed on or near the Earth’s surface, in contrast to metamorphic and igneous rocks, which are formed deep within the Earth. Sedimentary and igneous rocks began as something other than rock. Metamorphic rocks 1. OBJ: Given notes and activity sheet SWBAT explain how metamorphic rocks … Metamorphic Rock Types . OLDER ROCKS MAY BE FORMED INTO A NEW TYPE OF METAMORPHIC ROCK 3. Igneous, Sedimentary, and Metamorphic Rocks Chapter 5 & 6 P Squires 2005-2006 O SlideShare utiliza cookies para otimizar a funcionalidade e o desempenho do site, assim como para apresentar publicidade mais relevante aos nossos usuários. Each of these will be discussed in turn, then we will summarize how metamorphic rocks are classified. Like water cycle, there exist rock cycle (geological cycle) in geology. 4. Metamorphism and metamorphic rocks • Rocks created by heat, pressure and/or chemically reactive fluids • Metamorphic rocks are produced from • Igneous rocks • … O SlideShare utiliza cookies para otimizar a funcionalidade e o desempenho do site, assim como para apresentar publicidade mais relevante aos nossos usuários. of Geology @ USI Other titles We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. If you continue browsing the site, you agree to the use of cookies on this website. Change is a result of pressure (directed stress) and heat •Solid state reaction •No net change in chemistry (ideally – role of groundwater) •Recrystallization of new minerals from old … The composition of the rocks as well as the temperature and amount of pressure placed on them all play a role in the type of metamorphic rock formed. Any type of rock—igneous, sedimentary, or metamorphic—can become a metamorphic rock. A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures. The need for stability may cause the structure of minerals to rearra… S6E5. Metamorphic rocks are rocks that have changed from igneous rocks or metamorphic rocks. The assemblage is typical of what is formed in conditions corresponding to an area on the two dimensional graph of temperature vs. pressure (See diagram in Figure 1). Rocks that undergo a change to form a new rock are referred to as metamorphic rocks. Metamorphic Rocks FORMED BY HEAT AND PRESSURE 2. Metamorphic rock - Metamorphic rock - Pressure: The pressure experienced by a rock during metamorphism is due primarily to the weight of the overlying rocks (i.e., lithostatic pressure) and is generally reported in units of bars or kilobars. Peak metamorphic conditions are about 0.7 GPa (21 km depth) and 640°C. Metamorphic rock, any rock that results from the alteration of preexisting rocks in response to changing conditions, such as variations in temperature, pressure, and mechanical stress, and the addition or subtraction of chemical components. Classification of metamorphic rocks is based on mineral assemblage, texture, protolith, and bulk chemical composition of the rock. Texture In metamorphic rocks individual minerals may or may not be bounded by crystal faces. They are not made from molten rock – rocks that do melt form igneous rocks instead. Igneous, Sedimentary, and Metamorphic Rocks Chapter 5 & 6 P Squires 2005-2006 Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A general outline of metamorphic settings is shown below. This combination is generated only deep in the crust by tectonic forces that operate on a grand scale, so granofels is a product of regional, rather than contact, metamorphism. Notes on rocks from class. The original rock is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change.The protolith may be a sedimentary, igneous, or existing metamorphic rock. limits and type of metamorphic agents. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, … We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. It typically contains ab… change in Chemical composition, texture and structure Metamorphic rocks Metamorphic rocks process of formation 2014 1. Definition, metamorphism. OBJ: Given notes and activity sheet SWBAT explain how metamorphic rocks are formed, classified and used with 70% accuracy DN: HW Check- WEDS Activity Sheet (distribute Answer Key); Watch video - AIM: How are metamorphic rocks formed, classified and used? In the rock cycle, there are three different types of rocks: sedimentary, igneous, and metamorphic. PowerPoint Presentation - Metamorphic Rocks Author: James M. Durbin Last modified by: James M. Durbin Created Date: 7/23/2001 2:18:43 PM Document presentation format: On-screen Show Company: Dept. • Recognize the different types of … All that is needed is enough heat and/or pressure to alter the existing rock’s physical or chemical makeup without melting the rock entirely. Metamorphic rocks 1. from desk of Y S G Govind Babu 2. • Describe how metamorphic rocks are produced by the action of heat, pressure, and fluids on preexisting parent rocks over the course of time. EARTHQUAKES AND VOLCANIC ACTIVITY CAUSE HEAT AND PRESSURE TO ACT ON ROCKS. If you continue browsing the site, you agree to the use of cookies on this website. The charnockite suite or series is a particularly widespread form of granofels.Granofels are one of the few non-foliated rocks to form under relatively high temperatures and pressures. You can change your ad preferences anytime. Learning Goal: Understand how metamorphic rocks are formed and classified. Rocks change during metamorphism because the minerals need to be stable under the new temperature and pressure conditions. Charnockite series. Metamorphic rocks and processes • Metamorphism comes from the Greek words “Meta” - change “Morphe” - form • Metamorphic rocks form by solid-state (no melting) transformation of preexisting rock by processes that take place beneath Earth’s surface. 5. Metamorphic rocks are formed from other rocks that are changed because of heat or pressure. 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