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Unformatted text preview: med during high temperature and relatively high
composition of a basalt, butnext.
pressure metamorphism. A microscopic view is
foliation Amphibolitic gneiss thin sect
(metabasalt ( polarized light) foliation GRANITE (LEFT)
(BELOW) foliation Quartz and mica
schist (below) —
originally a sandstone
with clay (to left);
polarized light) foliated granoblastic (non-foliated)
Porphyroblasts = large met. crystals in a finer-grained matrix Metamorphic rocks and their
protoliths garnet porphyroblasts Quartzite -- no
WHY? QUARTZITE — RECRYSTALLIZED
QUARTZ SANDSTONE. A MICROSCOPIC VIEW, POLARIZED LIGHT Erosion Metamorphic rocks w/ granitic dikes Migmatitic gneiss, San Gabriel Mtns, California —
these gneisses have begun to melt (—> magma)...
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This note was uploaded on 05/11/2013 for the course GEOL 105Lg taught by Professor Davis,platt during the Fall '07 term at USC.
- Fall '07