1. Metamorphism & Metamorphic Rocks

2. The rock that forms depends on: How do Metamorphic rocks form?

3. Why Should You Study Metamorphic Rocks? What are the 3 Agents of Metamorphism?

4. Heat ___________ the rate of chemical reactions. Sources of Heat: How does TIME affect transformations?

5. Lithostatic 

6. Differential __________:

8. Types of Metamorphism

9. Regional Metamorphism

10. Contact Metamorphism Alteration occurs because:

11. Aureole  Width determined by:

12. Index Minerals

13. Mylonites  Dynamic / Cataclastic Metamorphism

14. How Are Metamorphic Rocks Classified? Two Groups foliation 

15. Foliated Meta. Rocks Rock Typical Meta. Features Parent Name Minerals Grade of Rock Rock Name Minerals Grade of Rock Rock Slate clays, micas, low fine-grained, shale, chlorite splits uniformly vol. ash chlorite splits uniformly vol. ash Phyllite quartz, micas, low-med fine-gr, glossy shale chlorite “crinkled” chlorite “crinkled” Schist micas, chlorite, med-high distinct foliation shale, talc, garnet visible carbonates, hbl basalt/gabbro Gneiss qtz, feldspar, high light & dark shale, hbl, micas bands sandstone, basalt/gabbro felsic ign. Amphibolite hbl med-high dark, weak fol. basalt/gabbro Migmatite qtz, feldspar, very granite streaks felsic ign. & hbl, mica high in gneiss sed. mixed

16. SLATE (very fine-grained, foliated) formed by ____________, ___________ metamorphism used for

17. PHYLLITE (fine-grained, foliated) glossy sheen coarser-gr. than slate “crinkled” appearance

18. SCHIST (medium-grained, foliated) platy/elongate minerals _________________________ metamorphism Schistose foliation 

19. GNEISS (medium-grained, foliated) ______________ ________________________ metamorphism Light bands  granular minerals. (______________________) Dark bands  platy/elongate min. (______________________)

20. AMPHIBOLITE  (med-gr, foliated) hornblende & plagioclase (___________________ regional meta.) MIGMATITES (mixed rocks) _________________________ metamorphism High-grade meta. rx intermix w/ streaks of granite. Georgian Bay, Ontario, Canada

21. Nonfoliated Metamorphic Rocks

22. Nonfoliated Meta. Rocks Rock Typical Meta. Features Parent Name Minerals Grade of Rock Rock Marble calcite, low-high interlocking limestone, dolomite grains dolostone Quartzite quartz med-high interlocking quartz grains, hard sandstone Greenstone chlorite, epidote, low-high fine-grained mafic ign. hornblende green color Hornfels micas, garnet, low-med fine-grained, mudrocks quartz hard, dense Anthracite carbon high black, lustrous, coal subconchoidal fracture

23. Marble ________________________________ metamorphism Parent Rock = How is Marble used? metamorphism C

24. QUARTZITE _____________________________________ metamorphism Parent Rock = ________________________ Hard & compact w/ uniform strength [breaks across grains rather than around them] used in __________________________________________ metamorphism

25. Greenstone  ( ____________________ meta ) Parent rock = ________________________ (green color from chlorite, epidote, & hornblende) Hornfels  ( __________________________ meta ) Parent rock = __________________________ equidimensional grains Anthracite  Parent rock = ___________________________

26. Isograd  What Are Metamorphic Zones?

27. Does Metamorphism Relate to Plate Tectonics? Low-temp/high-press  _______ part of subducting plate High-temp./high-press  _______ part of subducting plate High-temp/low-press  _________ meta. follows

28. Natural Resources Minerals used: talc  graphite  garnet  kyanite  asbestos  {Chrysotile  silky fibers 95% of all asbestos used in the U.S.} {Crocidolite  long, straight fibers This variety presents a health risk. EPA policies treat all asbestos the same.} Chrysotile

29. Ore Deposits Ore Mineral Formula Uses Copper Bornite Cu 5 FeS 4 transportation, communications Iron Hematite Fe 2 O 3 steel manufacturing Magnetite Fe 3 O 4 Lead Galena PbS batteries, pipes, solder Tin Cassiterite SnO 2 plating, solder, alloys Tungsten Scheelite CaWO 4 metal hardening, Wolframite (Fe,Mn)WO 4 carbide manufacturing Zinc Sphalerite (Zn,Fe)S batteries, brass making, galvanizing iron (hydrothermal contact meta.)