PPT-1 Metamorphism and Metamorphic Rocks

GLY 2010 Summer 2016 Lecture 11 2 Metamorphism The mineralogical chemical and structural adjustment of solid rocks to physical and chemical conditions 3 Metamorphic Rock Any rock derived from preexisting rocks by mineralogical chemical andor structural changes essentially in the solid state . Rock Environments. Metamorphic Environments. What Is Metamorphism?. Metamorphism. . Changes rock via temperatures and/or pressures unlike those in which it initially formed. All metamorphic rocks have a . Change is Good. Metamorphic Rocks. Formed from intense heat and pressure!. Sources of Heat. 300-1400 degree Celsius temperatures are needed for Metamorphism.. Sources of heat include:. Magma or lava. LOWER-GRADE REGIONAL METAMORPHICS. Slate, Phyllite, . “Greenstone” and Schist. 2. Metamorphic Rock Definition. A sedimentary, igneous, or previously existing metamorphic rock which has undergone textural, structural, and/or mineralogical changes due to the action of one or more agents of metamorphism. Introduction to Metamorphism. GLY 4310 - Spring, 2016. 2. Metamorphism Definition. “The mineralogical, chemical, and structural adjustment of solid rocks to physical and chemical conditions which differ from the conditions under which the rocks in question originated” (from the Glossary of geology, 2nd edition) . Bell ringer: . Looking at the pictures, what do you think metamorphic rocks are? . What are Metamorphic Rocks? . Metamorphism means “to change form”.. Metamorphic rocks are rocks that form when . Spring 2016. 2. Important Note. Material from this review may appear on the final examination, in the same or somewhat altered . form. Questions are on the body of the slide. Answers are in the notes section – this allows you to quiz yourself before checking the answer. Sedimentary-sandstone. Metamorphic- gneiss. Igneous- diorite. 1. What is a Rock?. Naturally Occurring . (not man made). Solid. Mixture of minerals other organic matter. 2. What makes a rock different from a mineral?. happen because of 1.. heat. . (but not enough to cause melting), . 2. pressure and/or 3.chemical reaction . marble. How do the grain patterns of . granite . (igneous) and . gneiss . (metamorphic) compare?. Color . Texture. Light. Dark. Fine. Coarse . Igneous rocks are classified according to their. . origin. , . texture. , and . mineral composition. .. Origin . D. id it harden inside the earth or on the earth’s surface?. LOWER-GRADE REGIONAL METAMORPHICS. Slate, Phyllite, . “Greenstone” and Schist. 2. Metamorphic Rock Definition. A sedimentary, igneous, or previously existing metamorphic rock which has undergone textural, structural, and/or mineralogical changes due to the action of one or more agents of metamorphism. CONTACT AND DYNAMIC METAMORPHIC ROCKS. Hornfels, Skarns, Talc-Tremolite Schist, and Epidosite. 2. Contact and Dynamic Metamorphism. The rocks in this lab are formed either by contact metamorphism or by dynamic metamorphism associated with movement along a fault. Metamorphic Rocks. “Meta” means change (Greek). “Morph” means form (Greek). A rock that has been changed from its original form (parent rock) by heat, pressure, and fluid activity into a new form (daughter rock).. . Metamorphic Rock. -. . "Meta"= Change . (Grk). -. . "Morph"= form . (Grk). •. . Metamorphic Rock. -. . "Meta"= Change . (Grk). -. . "Morph"= form . (Grk). -. . a rock that has been changed. 6. What is Metamorphism. Metamorphism. (from the Greek words for “changing form”) is the process by which rising temperature and changes in other environmental conditions transform rocks and minerals.