Like water cycle, there exist rock cycle (geological cycle) in geology. … Also get details about their Definition, Origin, Formation Process, Textures, Colors etc here. More information. Rock: A solid mass comprising one or more than one mineral as its constituent is termed as the rock. List. Classification of metamorphic rocks is based on mineral assemblage, texture, protolith, and bulk chemical composition of the rock. Gneiss. A metamorphic rock is a result of a transformation of a pre-existing rock. Metamorphic rocks can be divided on the basis of their metamorphism – regional, thermal, hydrothermal, and fault zone metamorphism. Figure 1. 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. Eventually, the names in the classifiction will be clickable to a picture/description. Marble is limestone that has undergone some changes. During metamorphic action, the pressure on rock can reach 50 thousand pounds per square inch. Hornfels. 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. The list below divides metamorphic rocks into foliated and nonfoliated varieties. Amphibolite. These agents can act and interact in an almost infinite variety of ways. The platy layers in this large outcrop of metamorphic rock show the effects of pressure on rocks during metamorphism. Metamorphic Rocks: Photos, descriptions and facts about foliated and non-foliated metamorphic rocks. Marble. 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. The four main agents that metamorphose rocks are heat, pressure, fluids, and strain. Metamorphic Rocks List & Flashcards. Mariposite. Source: Joyce M. McBeth (2018) after Karla Panchuk (2018) CC-BY 4.0. Some kinds of metamorphic rocks -- granite gneiss and biotite schist are two examples -- are strongly banded or foliated. Gneiss : composed of quartz, feldspar and mica. Regional metamorphic rocks are found in the mountainous regions, and are developed in accordance to the pressure exerted onto them by the … 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. 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. Dec 10, 2016 - Explore bbt900's board "METAMORPHIC ROCKS" on Pinterest. Metamorphic rocks are the third great class of rocks. Its composition is equal to that of granite but forms alternating layers of clear and dark minerals. See more ideas about metamorphic rocks, metamorphic, rocks and minerals. Interesting Facts. View source . Metamorphic Rock. Metamorphic rocks are formed by existing igneous or sedimentary rock material that has undergone a chemical or physical change due to heat and pressure. List and describe the characteristics of sedimentary, igneous, and metamorphic rock. Marble. Metamorphic rocks start off as igneous, sedimentary, or other metamorphic rocks. Metamorphic rocks can form in different conditions, in different temperatures (up to 200 °C) and pressures (up to 1500 bars). Its basic component is calcium carbonate. Uplift and erosion help bring metamorphic rock to the Earth's surface. Piece of slate, metamorphic rock. These rocks are changed when heat or pressure alters the existing rock’s physical or chemical make up. The term petrology may be used in papers pertaining to the discipline. Get more information about main rocks like Slate, Marble, Schist, Gneiss, Quartzite. Lapis Lazuli. 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. Their study provides us with important data regarding formation of the Earth and the past geological environment. Then, due to various conditions within the Earth, the existing rock was changed into a new kind of metamorphic rock. Chapter 1 / Set (46 cards) Cards; Course; Try it risk-free for 30 days Metamorphic Rocks List & Flashcards Study 46 cards × 1. The preexisting rocks may be igneous, sedimentary, or other metamorphic rocks. Metamorphic rocks are like probes that have gone down into the Earth and come back, bringing an record of the conditions they encountered on their journey in the depths of the Earth. Other common metamorphic rocks are called marble, gneiss, schist. Metamorphic Rocks. 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. The conditions required to form a metamorphic rock are very specific. 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. They occur when sedimentary and igneous rocks become changed, or metamorphosed, by conditions underground. Metamorphic rocks Two lists are provided, an hierarchical list and alphabetical list which gives a table of group names. Cases of incomplete autoposting are marked on both. Many of the images have two views, most showing paired plane- and cross-polarized light images. Label the three coloured areas of the map with the appropriate zone names (garnet, chlorite, and biotite). Examples of these rock types include marble, slate, gneiss, schist. Foliated rocks have platy or elongate minerals aligned in roughly parallel planes or in wavy bands or planes. Each of these will be discussed in turn, then we will summarize how metamorphic rocks are classified. Read this ScienceStruck article to gain extensive information about the main features of these rocks. One ways rocks may change during metamorphism is by rearrangement of their mineral crystals. Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble. Quartzite : hard metamorphic broken with high quartz content. This heat and pressure changes the rock into a denser form, which is the main characteristic of metamorphic rock. Here, we will have a look at some related facts, and also the various types of metamorphic rocks. Texture In metamorphic rocks individual minerals may or may not be bounded by crystal faces. The original rock is subjected to very high heat and pressure, which cause obvious physical and/or chemical changes. Fill in the metamorphic rocks corresponding to each protolith in the following table. 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. 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, … The shaded areas are metamorphic rock, and the three metamorphic zones represented are garnet, chlorite, and biotite. 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. We know diamonds form deep in the earth where the earth’s lower crust and its upper mantle meet. This denser form makes metamorphic rocks more difficult to erode or break down. In the lab, we make diamonds at 3,000 degrees Celsius and pressure that measures 50,000 pounds per square inch. 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