A. Schistosity formed by muscovite and biotite. A thorough presentation on characteristics and description of all main types of metamorphic rocks. The three main types, or classes, of rocks include sedimentary, metamorphic and igneous. gneiss. Parts Of Rocks. The fabric can be either a planar fabric, called “foliation”, or a linear fabric, called “lineation”. Figure 9 – 4. Grain orientations 4. metaconglomerate. Heat and pressure help change an igneous or sedimentary rock into a new kind of rock (think about how a caterpillar becomes a butterfly) The Rock Cycle. Igneous Rocks. Rocks can be sorted into groups by looking at their parts. By this definition schist is a broad term, and slates and phyllites are also types of schists. Rocks from Volcanic Sources. Grain shapes 2. Most of the most common rocks in the crust are silicates. The Rock Cycle. Foliated Metamorphic Rocks. In common usage, schists are restricted to those metamorphic rocks in which the foliated minerals are coarse enough to see easily in hand specimen. forces at areas known as . Metamorphic rocks are formed from existing sedimentary rocks that are changed because of heat or pressure Earth movements may cause rocks to be deeply buried or ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7f7e02-NWExY rock cycle. Typically metamorphic rocks develop some kind of metamorphic fabric during the metamorphic event(s). tectonic. metamorphic. • Recognize the different types of … Regional and contact metamorphism. Grain sizes 3. Metamorphic Rock. subduction. Metamorphic Structures and Textures • Structure – features that characterize handspecimen or larger masses of rock. ... Metamorphic Rocks. zones. • Restate how metamorphic rocks relate to the two other rock groups (sedimentary and igneous). Rocks have many different parts . conglomerate. Some rock parts are: Metamorphic Rocks Presentation - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Metamorphic rock fabrics. Silicate structure. -TEXTURE=sizes, shapes and positions of grains in the rocks TYPES OF ROCKS THE COMPOSITION OF ROCKS IS DETERMINED -BY THE KIND OF MINERALS & -THE AMOUNT MINERALS THAT MAKE IT UP TYPES OF ROCKS 3 TYPES OF ROCKS IGNEOUS SEDIMENTARY METAMORPHIC FORMED WHEN MAGMA or LAVA COOLS AND HARDENS (SOLIDIFIES) 2 TYPES INTRUSIVE … 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. Once in Earth's interior, extreme pressures and temperatures melt the rock back into magma to begin the . 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