What are metamorphic rocks characteristics?

2. Rarely has fossils. 3. May react with acid. 4. May have alternate bands of light and dark minerals. 5. May be composed of only one mineral, ex. marble & quartzite. 6. May have layers of...

Foliation.

Sedimentary (as in sediment) rocks are sometimes grainy, they're made when different layers of pebbles, sand and such, are all compacted together by pressure, so they usually have layers, and...

holes from trapped gasescolored, parallel layersflattened crystalsbending from pressure

Metamorphic rocks may display foliation, which is the layering, banding, or platiness that is associated with the rearrangement of mineral crystals due to directional pressure. Examples of foliated...