Metamorphic Rocks

Jun 30th, 2015
Studypool Tutor
Price: $10 USD

Tutor description

How would you know? -contain meta minerals; mins that only happen because of memorphing -has memorph texture from grain arrangement -memorph foliation: parallel alignment of platys or presence of alternating layers

Word Count: 1604
Showing Page: 1/5
8. Metamorphic Rocksfirst dude: James Huttonformed when protolith goes through solid-state change in response to modification of environmentHow would you know?-contain meta minerals; mins that only happen because of memorphing-has memorph texture from grain arrangement-memorph foliation: parallel alignment of platys or presence of alternating layersFormation happens from various processes, sometimes they happen together:-recrystallization: changes grain shape/size without changing identity-phase change: change one min to another min with same comp but different structure. Rearrangement of atoms-memorph reaction/neo-crystallization: chemical reactions digest the protolith and make new mins of the memorph rock. Atoms migrate through solid crystals??-pressure solution: wet rock is squeezed more strongly in one direction-plastic deformation: rock is squeezed/sheared at high temp/pressure. Mins become soft and change shape w/o breaking.Memorphing due to heatingmemorphing happens usually from heat, temps 250C 850C. But comp/water can change that, so it could be more like 650C 1200C. Depth at which this occurs depends on how close you are to hot things.Memorphing from pressurepressure: stress from all sidesPack mins together, and you get denser mins! Phase change/neocrys. Average is 12 kbar, or 12000x pressure of earth's surface.Changing Pressure and Temp TogetherDifferent memorph mins will form from the same protolith at different deltas of press

Review from student

Studypool Student
" Excellent work as usual "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1831 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors