METAMORPHIC ROCKS

Metamorphic Rocks: Formed due to intense heat and pressure deep inside the earth. May have ribbon-like layers or may have shiny crystals. Classified into 2 categories: Foliated Nonfoliated

Foliated Metamorpic Rocks: The mineral grains are arranged in bands or layers Examples: Gneiss Slate

GNEISS SLATE

Nonfoliated Metamorphic Rocks Mineral grains are NOT aligned Examples: Marble Quartzite

MARBLE QUARTZITE

What kind of rock are rocks in which the structure, texture, or composition has been changed? Metamorphic What force or forces can create metamorphic rocks? Heat and Pressure or a combination of both

Pressure cause by large movements with the crust sometimes cause the _________________________ in metamorphic rocks to aligh themselves in parallel bands. Mineral grains During ______________________ rock is heated by nearby magma. Metamorphism

The effect of heat on a rock decreases as the rock’s__________________ from the magma increases and its _________________ decreases. Distance Temperature What do we call metamorphic rocks in which mineral grains are NOT aligned? Non foliated After quarts limestone has recrystallized, the new rock is called_________. Marble