Compléter Fill in the Blanks: Foliated and Non-Foliated Metamorphic RocksVersion en ligne Test your knowledge about foliated and non-foliated metamorphic rocks by filling in the blanks in this educational game! par Mark Masloski 1 history marble non foliated Metamorphism gneiss pressure Foliated Metamorphic Foliated and Non - Foliated Metamorphic Rocks rocks are formed from pre - existing rocks through the process of metamorphism . involves the transformation of the original rock into a new rock due to changes in temperature , , and chemical composition . metamorphic rocks have a layered or banded appearance due to the alignment of minerals , while - metamorphic rocks do not have a layered structure . Examples of foliated metamorphic rocks include slate , schist , and , while examples of non - foliated metamorphic rocks include and quartzite . These rocks can provide valuable information about the geological of an area and are often used in construction and sculpture .