Figure 13.17
Foliated and nonfoliated metamorphic rocks. (A) These metamorphic rocks near Geiranger, Norway, a type called gneiss, show a conspicuous banded foliation pattern. (B) Marble is a nonfoliated metamorphic rock that is prized by sculptors for its fine grain and ease of carving. Shown here is a detail of Michelangelo’s David, carved from marble.(A. © Dr. Juerg Alean/Science Source; B. © The Bridgeman Art Library/Getty Images)