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Test notes - Schist next product of shale shinny with mica...

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Metamorphic Rocks: o Transformation of pre-existing rock (protolith) o Does NOT melt rock o Less stable minerals become MORE stable o Only happens beneath the earth’s surface o Factors to create Metamorphic Heat – Can occur by burrying Pressure – Confining Pressure (Lithostatic pressure), equal pressure from all sides; compressed into smaller volume, doesn’t change shape, ions move to non-pressure points, measured in kilobars Directed Pressure; pressure is greater in one direction than another; occurs at plate boundaries; foliation occurs perpendicular to pressure Hot circulating fluids – predominately water mixed with ions; o Rock Types Slate - first product of metamorphism of shale Phyllite - next product of shale (phyllo pastry)
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Unformatted text preview: Schist - next product of shale; shinny with mica flakes Gneiss - next product of shale, felsic igneous rocks Migmatite o Types of Metamorphism Contact Metamorphism: High temp. low pressure; solid rock near magma may be baked by heat Regional Metamorphism: larger area span; occurs at continental collision zones; high temp. and high pressure Subduction zone: creates bluschist metamorphism; low temp. high pressure Hydrothermal Metamorphism: high temp. low pressure; o Rock to remember Conglomerate –> Breccia –> Sandstone –> Siltstone –> Shale o Smaller “Smashed” versions Metaconglomerate Metasandstone...
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