Wednesday, April 12, 2023

The Earth’s Crust

Metamorphic Rock

3. Metamorphic Rock – “Changing Form” Once a rock exists (as igneous or sedimentary), it can be changed into another, different kind of rock by using pressure and heat (and a lot of time)

Metamorphic rock – rock that has changed form into a new type of rock.

The original rock (parent rock) is changed by pressure and heat to form a new metamorphic rock.

Parent Rock Metamorphic Rock

Granite pressure and heat

Examples

Gneiss

Parent Rock Metamorphic Rock

Sandstone pressure and heat Sandstone Quartzite

Parent Rock Metamorphic Rock

Mudstone (Shale)

pressure and heat Mudstone Slate

(Shale)

Parent Rock Metamorphic Rock

Limestone pressure and heat Limestone Marble