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Topic/Objective:_______________ Full Name: _______________________________ _____________________________ Class: ___________________ _____________________________ Date: _________________ Tutor Use Only: Period: _____ Essential Question: Metamorphic Rocks Metamorphic means to change Sources of Metamorphic rocks: 1. Igneous 2. Sedimentary 3. Pre-existing Metamorphic rocks These rocks become metamorphic rocks when they are _changed_. Classification: 1. Formation____ conditions (where they form) 2. Texture______ 3. Parent Rock __ (what rock or rock type it came from) Common Metamorphic Rocks: Rock Name Parent Rock Slate Shale or mudstone Mica Shale or mudstone Gneiss Granite Quartzite Sandstone Marble Limestone Causes of Metamorphic rocks: Form when _Heat__________ and _Pressure________ change the rock. Sources of Heat: Increase in _Temperature______ due to _deep burial______ (20-30 degrees Celsius per kilometer below the Earth’s surface). o Caused by __radio active decay_________________ o Type of Metamorphism __regional_______________ Summary: Essential Question: Increase in _temperature________ due to _plate friction_________ (100300 degree Celsius per km below the Earth’s surface) o Caused by _Friction____ o Type of Metamorphism __dynamic/local________ Intrusion by _magma or hot pore fluids__ __________ o Type of Metamorphism __contact/thermal_____________ Sources of Pressure Weight of _overlaying rocks__________ (1 cubic foot of granite weighs 167 pounds) _Convergent boundaries_________________ _Transform boundaries________________ (side by side movement) Effects of Metamorphism on rocks impurities_______ such as _holes___ and _fossils____ are destroyed _pore space___ between grains is lost due to _compression_______ Rock __density_________ increases _Minerals crystals______ are flattened, enlarged and elongated. Types of Metamorphism Regional Metamorphism o Occurs in _large area_______ o Occurs in response to __deep burial______ by large areas of rock. o Occurs with __mountain building_______ (collision boundary) o Can have a range in grade of metamorphic rocks. Dynamic Metamorphism o Occurs between __moving plates________ (very localized and happens quickly) Thermal or Contact Metamorphism o Occurs when rock comes into contact with magma _ or hot pore fluids__ (geysers and hot springs) Summary: