Geo. 101 – 1st Edition Lecture 15 Outline of Last Lecture I. MetamorphismII. Metamorphic RockOutline of Current Lecture I. Types of MetamorphismII. Geological Time [Intro]Current LectureTypes of Metamorphism:- Contact Metamorphism: Heat from rising igneous intrusion metamorphose pre-existing rocks.o Low-High Temperatureso Low Pressures- Regional Metamorphism: Metamorphism caused by deep burial or tectonic forces that increase temperature and pressure over broad regions.o Low-High Temperatureso Low-High Pressures- Hydrothermal Metamorphism: Hot water percolates through spaces in rocks.o High Temperatureso Low Pressures- Burial Metamorphism: Rocks are metamorphosed by the weight of overlying rocks.o Low Temperatureso Low Pressures- Shock Metamorphism: Meteorite Impacto Extremely High Temperatures Look for Stichovite (shock quartz) - Polymorph of quartz often fractured due to impact.- Deformation (Fault) Metamorphism: Rocks along fault planes are crushed/pulverized.o Very Low Temperatureso High Pressure THINK: Along the San Andreas FaultMetamorphism and the Plate Tectonic ConnectionThese 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.- Convergent: Regional, Contact, Deformation- Divergent: Hydrothermal- Transform: Deformation- Hot Spots: Contact, some Hydrothermal- Plate Interiors – Burial- *The only one not connected to a plate tectonic is SHOCK.Geologic Time:- Telling time geologically:o Earth’s history is concealed in rockso One of the goals of geology is to unravel Earth’s history- Earth’s geologic clock:o Absolute Dating: determining event’s actual timeo Relative Dating: putting rocks/events in proper order Trying to put rocks in correct order of age without really knowing how oldthey
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