GEOSCI 100 Lecture Notes - Lecture 10: Metamorphic Rock, Phyllite, Schist
21 Mar 2018
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*sedimentary rocks tell us about ancient climates and climate. Change: evidence of cold climates: glacial till. Lecture slideshow slide #5: evidence of very arid and warm climates: evaporites. Lecture slideshow slide #6: evidence of warm wet climates: coal, evidence of warm, seasonally dry climates: caliche (calcrete, evidence of moist tropical climates: laterite. A lot of information about our future comes from sedimentary rocks. Exam questions: which rocks preserve a record of ancient climate conditions and climate change, metamorphic rocks, sedimentary rocks, igneous rocks, none of the above, true or false: current surface temperatures are the highest they have been in. *metamorphic rocks - existing rock that is modified (temp, pressure, fluids) Parent rock could be sedimentary, igneous, or another type of metamorphic rock. How do we make metamorphic rocks: pressure, temperature, hot fluids. Texture - determines if its a slate, schist, or gneiss. Mud shale slate phyllite schist .
