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Unformatted text preview: s, e.g. A ——> A
(examples: quartz to quartzite [SiO2],
calcite to marble [CaCO3]) • Recrystallization of rocks in which new minerals are
formed from old, e.g.
A + B + C — —> D +
E, or ——> F + C Quartz sand grains in sandstone Recrystallized quartz grains in
metamorphic quartzite Types of Recrystallization
• Recrystallization of rocks without the formation
of new minerals, e.g. A ——> A (examples:
quartzite [SiO2], marble [CaCO3]
• Recrystallization of rocks in which new
minerals are formed from old, e.g.
A + B + C ——> D + E,
or A + B——> F Metamorphic Realms
lt sa Low P,
Amphibolite Hi P,
log Ec Low T Glaucophane (blue) schists Basalt and Its Metamorphic Equivalents Amphibolite: Moderate P, T Glaucophane Schist: Hi P, Lo T Eclogite: Very Hi P, Lo T Franciscan blueschist
“knocker” in the Berkeley
Hills; inset shows a smaller
glaucophane schist block
with retrograde actinolite Microscopic view of blueschist from Catalina Island SHALE —> MICA SCHIST Metamorphosed limestone ——> marble FOLIATION
Increasing P, T ----> Foliation is a set of new planar surfaces...
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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