metamorphic rock. definition of metamorphic rocks metamorphic rocks are formed when existing rocks...
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Metamorphic Rock
Definition of Metamorphic Rocks
• Metamorphic rocks are formed when existing rocks are changed into a new rock because of heat, pressure, or chemical change
HeatPressure
Types of Metamorphism
Regional Metamorphism
• Occurs over a wide area.
• The heat and pressure are created at convergent boundaries where plates are colliding
• Usually produces foliated rocks
Contact Metamorphism
• A rock’s mineral and texture changes when the rock comes into contact with a magma chamber
• Change caused mainly by heat
• Creates mainly non-foliated rocks
Contact Metamorphism
Types of Metamorphic Rocks
• Foliated Rocks metamorphic rocks formed under great pressure where the new minerals are aligned into bands
• Non-Foliated Rocks metamorphic rocks
formed under lower heat and pressure where the minerals are not aligned into bands
Foliated Rock Examples
Parent Rock: Shale Daughter Rock: Slate
Foliated Rock Examples
Parent Rock: Granite Daughter Rock: Gneiss
Foliated Rock Examples
Parent Rock: Sandstone Daughter Rock: Schist
Non-Foliated Rock Examples
Parent Rock: Limestone Daughter Rock: Marble
Non-Foliated Rock Examples
Parent Rock: Sandstone Daughter: Quartzite