Metamorphic Rocks Metamorphic rocks have been changed from a pre-existing rock. Caused by extreme heat and/or pressure.
Metamorphic Rocks Sandstone: Quartzite, Metaquartzite Shale:Phyllite Slate Schist Gneiss Limestone:Marble Metamorphism of Sedimentary Rocks.
Identifying Metamorphic Rocks (PPT)
