Rock Topics

Classification of Metamorphic Rocks (Part 3)

Non-Foliatied Texture

• Non-foliated metamorphic rocks appear massive or granular without the characteristic parallel mineral grains in foliated rocks.

• Non-foliated metamorphic rocks are classified based primarily on their composition.

• Marble, quartzite, and soapstone are examples of non-foliated metamorphic rocks. 

Marble and QuartziteLeft: marble (photograph by Stan Johnson); right: quartzite (photograph by Parvinder Sethi)

MapMarble (left) and quartzite (right) are non-foliated metamorphic rocks.  This marble sample is from Albemarle County.  Quartzite is mined in Wythe County.