Metamorphic rocks began as another type of rock but have been significantly altered from their original igneous, sedimentary, or earlier metamorphic state. When rocks are subjected to high heat, high pressure, hot mineral-rich fluids, or, more commonly, some combination of these factors, metamorphic rocks form.
Metamorphic rock includes marble and slate.
Over time, extreme pressure and heat combine to form metamorphic rock.
Metamorphic rocks get their name because they always start out as another type of rock.
When slate forms, some of the original rock’s clay is replaced by the mineral mica.
Metamorphic rock can form from igneous and sedimentary rock, as well as other types of metamorphic rock.
Magma alters broken down pieces of rock near the Earth’s surface during contact metamorphism.
Magma chambers alter rocks buried deep within the Earth during regional metamorphism.
Foliated rocks are metamorphic rocks with parallel bands of grain.
Non-foliated rocks are metamorphic rocks that lack grain arrangement or bands.
Marble is a metamorphic rock that formed from limestone.
Schist is a metamorphic rock that can form from slate, another type of metamorphic rock.
Metamorphic literally means “changed form.”
Slate is a metamorphic rock formed by shale, clay, or mudstone.
The Taj Mahal in India is entirely made of various types of marble, a metamorphic rock.
Serpentine is a metamorphic rock that evolved from the igneous rock periodite.