Chapter 6: Change in the Solid State: Metamorphic Rocks
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(6.1) Foliation in Metamorphic Rock
This animation shows how squeezing or shearing a rock under metamorphic conditions can result in preferred mineral orientation. Inequant grains distributed through a soft matrix rotate into parallelism as the rock changes shape.
(6.2) What a Geologist Sees: Compositional Banding in Gneiss
A glaciated surface exposing gneiss contains alternating bands of light-colored and dark-colored minerals. A geologist's interpretation of the outcrop emphasizes the banding.
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