Metamorphic Rocks

how it forms

• Every metamorphic rock is a rock that's been changed in form
• Heat and pressure beneath earth makes metamorphic rocks
• A rocks texture, crystals, and mineral content changes.
• some types of these rocks are used for buildings or sculptures.

types of metamorphic rocks

• size and shape changes the mineral crystals in the rock
• Geologists classify these rocks according to the grain arrangement 

foliated & nonfoliated rocks

• foliated -- a metamorphic rock that have parallel layers of grains
• nonfoliated -- grains that are arranged randomly

building

• metamorphic rocks are important materials
• they are good for building anything 
• also it is good for building sculptures
• you can use slate to make flooring roofs and chalk boards

igneous rocks

• where oceanic plates move apart/magma moves upward igneous forms
• when magma rises from a volcano igneous rock can form
• when a collision of continental plates happens magma forms