Geol 1040 1st Edition Lecture 17Outline of Last Lecture XI. Examples of Sedimentarya. Coalb. ChertXII. Sedimentary structuresa. Provided info useful in the interpretation of Earth’s History b. Types of sedimentary structuresc. Cross blendingd. Ripple Markse. Mud Cracksf. FossilsXIII. Sedimentary Resourcesa. What they offer societyOutline of Current Lecture XIV.Agents of metamorphisma. Heatb. Pressurec. FluidsXV. Heat Sourcesa. Magmab. Geothermal GradientXVI. Pressure Sourcea. Confining pressureb. Differential pressure (or stress)XVII. Fluids Sourcea. Volatilesb. Subduction zonesc. Fractures/ Fault linesCurrent LectureXIV.Agents of metamorphisma. Heati. As heat rises metamorphism occursii. Deeper into the Earth, usually the warmer it isb. PressureThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.i. As pressure increases, metamorphism occursii. Deeper in the Earth, more pressure there isc. Fluidsi. Adding volatiles lower’s melting temperature and accelerates metamorphism or allows it to happen when it usually wouldn’tXV. Heat Sourcesa. Magmai. Allows contact metamorphismb. Geothermal Gradientii. Primitive radioactive heatiii. Radioactive material that originates from the Earth’s formationiv. Slowly wearing offXVI. Pressure Sourcea. Confining pressurei. Pressure equally around rockb. Differential pressure (or stress)ii. Force on rock is different in different areasiii. Pressure is not equal on all sides1. Causes foliationa. Minerals align and grow where there is less pressureXVII. Fluids Sourcea. Volatilesi. Water, CO2b. Subduction zonesii. As the ocean floor is subducted under the continental plate, it brings down elements deeper into the Earth with itiii. These elements have lower melting temperaturesc. Fractures/ Fault linesiv. Allow waters to go into the Earth as
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