Classification of metamorphic rocks is based on mineral assemblage, texture, protolith, and bulk chemical composition of the rock. Marble. Hornfels. The shaded areas are metamorphic rock, and the three metamorphic zones represented are garnet, chlorite, and biotite. Quartzite : hard metamorphic broken with high quartz content. We know diamonds form deep in the earth where the earth’s lower crust and its upper mantle meet. Dec 10, 2016 - Explore bbt900's board "METAMORPHIC ROCKS" on Pinterest. The conditions required to form a metamorphic rock are very specific. 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. They occur when sedimentary and igneous rocks become changed, or metamorphosed, by conditions underground. Gneiss. This heat and pressure changes the rock into a denser form, which is the main characteristic of metamorphic rock. Slate is a good roofing material, but people also use it for decorative gardening stones, as a base for snooker tables and it was used as a writing board (or writing slate) in the Victorian classroom. Metamorphic rocks are rocks that have changed from igneous rocks or metamorphic rocks. To name a metamorphic rock, the mineralogy is listed (in decreasing order of abundance) and then the rock is given a suffix relating to its general texture. For this reason, metamorphic rocks can take on all types of colors and textures. List and describe the characteristics of sedimentary, igneous, and metamorphic rock. These rocks are changed when heat or pressure alters the existing rock’s physical or chemical make up. Label the three coloured areas of the map with the appropriate zone names (garnet, chlorite, and biotite). Nonfoliated rocks may show colored bands that reflect minute impurities in the rock, but the dominant minerals show no visible alignment. Examples of these rock types include marble, slate, gneiss, schist. Marble is limestone that has undergone some changes. A metamorphic rock, on the other hand, began as a rock—either a sedimentary, igneous, or even a different sort of metamorphic rock. Then, due to various conditions within the Earth, the existing rock was changed into a new kind of metamorphic rock. Metamorphic rocks can be formed by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates. The preexisting rocks may be igneous, sedimentary, or other metamorphic rocks. The list below divides metamorphic rocks into foliated and nonfoliated varieties. Anthracite. This denser form makes metamorphic rocks more difficult to erode or break down. (Foliated means the parallel arrangement of certain mineral grains that gives the rock a … Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble. Low-grade metamorphism takes place at temperatures between about 200 to 320 o C, and relatively low pressure. Metamorphic rocks can be formed from sedimentary, igneous and even other metamorphic rocks. Metasomatic rocks are considered a subgroup of metamorphic rocks. Metamorphic rock is one of the 3 major classes of rock comprising the Earth's crust, the others being SEDIMENTARY and IGNEOUS ROCKS.Metamorphic rock has been transformed, while in the solid state, by pressure, temperature and deformation. All types of Metamorphic Rocks + have a variety of uses and many unknown and interesting facts. Read this ScienceStruck article to gain extensive information about the main features of these rocks. Piece of slate, metamorphic rock. 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. Source: Joyce M. McBeth (2018) after Karla Panchuk (2018) CC-BY 4.0. More information. Metamorphic rocks are formed by existing igneous or sedimentary rock material that has undergone a chemical or physical change due to heat and pressure. Metamorphic rocks Two lists are provided, an hierarchical list and alphabetical list which gives a table of group names. For example: A rock composed of 60% muscovite and 40% biotite, both occurring as interlocking platy grains - a schistose (schist-like; schists are a group of medium-grade metamorphic rocks) texture - is called a muscovite-biotite schist. Metamorphic rocks can be divided on the basis of their metamorphism – regional, thermal, hydrothermal, and fault zone metamorphism. Sorted by name; initial letter means Igneous, Sedimentary or Metamorphic rocks.. A I Andesite – an intermediate volcanic rock M Anthracite – a form of hard coal B S Banded iron formation – a fine grained chemical sedimentary rock composed of iron oxide minerals S Bauxite – the main ore of aluminium.It is mostly aluminium oxide. Interesting Facts. Texture In metamorphic rocks individual minerals may or may not be bounded by crystal faces. Other common metamorphic rocks are called marble, gneiss, schist. Rock: A solid mass comprising one or more than one mineral as its constituent is termed as the rock. Its composition is equal to that of granite but forms alternating layers of clear and dark minerals. Rock cycle means the process by which rocks are formed, degraded and reformed by the internal geological processes like plutonism, volcanism, uplift etc and/or by external geological process like erosion, weathering, … Amphibolite. Regional metamorphic rocks are found in the mountainous regions, and are developed in accordance to the pressure exerted onto them by the … It is a hard crystalline rock and has many uses. During metamorphic action, the pressure on rock can reach 50 thousand pounds per square inch. A metamorphic rock is a result of a transformation of a pre-existing rock. Metamorphic Rocks: Photos, descriptions and facts about foliated and non-foliated metamorphic rocks. Marble. Like water cycle, there exist rock cycle (geological cycle) in geology. List. 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. Also get details about their Definition, Origin, Formation Process, Textures, Colors etc here. … Novaculite. Remember that all of the igneous minerals can also occur in metamorphic rocks. Marble : compact metamorphic rock that evolved from limestone rocks subjected to high temperature and pressure. The platy layers in this large outcrop of metamorphic rock show the effects of pressure on rocks during metamorphism. Here, we will have a look at some related facts, and also the various types of metamorphic rocks. Cases of incomplete autoposting are marked on both. Mariposite. These agents can act and interact in an almost infinite variety of ways. Metamorphic grade is a general term for describing the relative temperature and pressure conditions under which metamorphic rocks form. Many of the images have two views, most showing paired plane- and cross-polarized light images. Lapis Lazuli. 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. One of the oldest types of rocks on our planet, metamorphic rocks are mainly formed due to changes in the parameters of temperature and pressure, which act on the parent material. The original rock is subjected to very high heat and pressure, which cause obvious physical and/or chemical changes. See more ideas about metamorphic rocks, metamorphic, rocks and minerals. Those shown here are either rare or absent in igneous rocks, the minerals look somewhat different because of their metamorphic petrogenesis, or if I just like them. Below the table is a classification showing the relationships among the metamorphic rocks. 7.2 Classification of Metamorphic Rocks There are two main types of metamorphic rocks: those that are foliated because they have formed in an environment with either directed pressure or shear stress, and those that are not foliated because they have formed in an environment without directed pressure or relatively near the surface with very little pressure at all. Metamorphic Rock. In the lab, we make diamonds at 3,000 degrees Celsius and pressure that measures 50,000 pounds per square inch. Metamorphic rocks start off as igneous, sedimentary, or other metamorphic rocks. Their study provides us with important data regarding formation of the Earth and the past geological environment. Metamorphic Rocks. Some kinds of metamorphic rocks -- granite gneiss and biotite schist are two examples -- are strongly banded or foliated. One ways rocks may change during metamorphism is by rearrangement of their mineral crystals. Extra review questions that may be covered in lecture (depending on your professor) that are … Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as ‘clastic’ sedimentary rocks); by the accumulation and the consolidation of sediments; by the deposition of the results of biogenic activity; and by precipitation from solution. Gneiss : composed of quartz, feldspar and mica. Each of these will be discussed in turn, then we will summarize how metamorphic rocks are classified. Chapter 1 / Set (46 cards) Cards; Course; Try it risk-free for 30 days Metamorphic Rocks List & Flashcards Study 46 cards × 1. 7.2 Classification of Metamorphic Rocks There are two main types of metamorphic rocks: those that are foliated because they have formed in an environment with either directed pressure or shear stress, and those that are not foliated because they have formed in an environment without directed pressure or relatively near the surface with very little pressure at all. Its basic component is calcium carbonate. Fill in the metamorphic rocks corresponding to each protolith in the following table. View source . Metamorphic rocks can form in different conditions, in different temperatures (up to 200 °C) and pressures (up to 1500 bars). Metamorphic Rocks List & Flashcards. Get more information about main rocks like Slate, Marble, Schist, Gneiss, Quartzite. Eventually, the names in the classifiction will be clickable to a picture/description. 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