From left to right (in order of increasing grade) slate, phyllite, schist, gneiss. (Met-01)
Mylonitic gneiss and asymmetric porphyroclasts. In this example, ,shear was top-to-the-right (SrD-58).
Ductiley deformed pebble conglomerate. Kingston Peak Formation, SE California (SrD-39).
Retrograde metamorphism: chloritic gneiss. Note the normal faults
Talc deposit, formed by contact metamorphism at contact of mafic sill and dolomite. Proterozoic Crystal Spring Formation, Death Valley National Park, California. (Met-21)
Contact metamorphism: calc-silicate skarn (mostly garnet) in marble. (Met-22)
Migmatite gneiss. (Met-17)
Folded Archean gneiss, Teton Range, Wyoming. Photo is approximately 60 cm across. (5D-6313)
Marble hand samples. (30-3459)
Metasedimentary rock of the southern Alps near Aoraki/Mt. Cook, New Zealand. (ID: 140128-73)
Garnet porphyroblasts in quartz mica schist. (110330-1)
En-echelon pegmatite veins (small dikes) in gneiss. (101229-12)
Close-up view of metaconglomerate. Green color comes from the metamorphic mineral, chlorite. Note impinging grains from dissolution creep. (150218-40-2)
This hand sample of gneiss shows crystals that formed in the same orientation, as a result of recrystallization while under directed pressure. (Image ID# met-09)