ANSWER 72 TO 99
UPLOAD TO SLIDE SHARE
• aaaaaaaaaaROCKEXAM aaaaaFELSIC PAGE 58
• THIS PLUS 3 OTHERS
• 1. SLIDE SHARE
• 2. ...
Take a box and the donow and hold
your exam in your hand
• Faith heart and skill (
• Different igneous rocks are formed depending
on the presence of different minerals and how
fast the magma cools. Some ig...
Page 51
• 3.
• A.> i. crust has greater surface area
• ii. > crust cools faster –has no concealed
center – a ball does!
• ...
PAGE 51
• 3.
C. i. > Large cube 1 cm2
8 small cubes – approx 8 cm2-more area
C. ii. > Small cubes cool faster
C. iii. > sm...
Exercise 3 -52
• Phaneritic- course-cooled slowly-should have
crystal-ions migrated slowly and formed
crystals-nucleation ...
Exercise 3- page 52
• A) same rock material
• Regions close together-
• 1st area cooled fast and was not viscous
• 2nd are...
Exercise 3- page 52
• 3-D –shallow INTRUSIVE IGNEOUS ROCKS
• -have-fine course grains
• Than DEEP INTRUSIVE IGENOUS ROCKS
...
Go right to excersice
• Felsic-dense spotty material to the left
• Intermediate
• Mafic –less dense percentages to the righ
Lets all go to the do now-we will come
back to this
• Can use page 58 to complete this and hand
directly in
Felsic
• white mica" (muscovite
• Quart
• K –feldspar
• biotite
FELSIC = fel-feldspar
=sic-silica
• Light weight- low specific gravity
• Biotite, quartz and potassic feldspar
• Ligth col...
1. Microcline(K-Feldspar)
• Microcline(K-Feldspar)
j5--2. Milky quartz sample
j5----yes--4. muscovite-FELSIC
mafic
• Albite (plagioclase feldspar
• Olivine
• Augite --Pyroxene
• . Hornblende -amphilbole
Mafic - “ma”---”fic”
• Comes from ferric-mag-Mg –magnesium
• Ferric-loves iron
• Less silica
• Calcium rich plagioclase
• ...
mafic--. Albite (plagioclase feldspar)
mafic==. Hornblende (amphibole)
mafic==. Augite (pyroxene)
mafic===Olivine
. Mg-rich olivine crystallizes
from magma
TO THE LEFT-PAGE 58
• GRANITE PEGAMATITE
• RYOLITE PEGAMATITE
• PORPHRITIC GRANITE
• PORPHRITIC RYOLITE
– OBSIDIAN
– PUMIC...
PAGE 52
• 4 (B)-3a pyroxene-slow cooling rate wih
aphanetic –large cubesstyrofoam walls
• 4(B)-3b hornblende-aphanitic=fa...
Lava rock and pumice
• Porous igneous rock –bubbles have formed
just as lava solidifies-the shape of the bubbles
have been...
Fragmental textures
• Due to pyroclastic debris
• Pyro –fire
• Clast-broken
• “large blocks or bombs”
• Have crystals form...
Exercise 5
• Which rock formed in ash fall?
• C. volcanic rock fragments in a very fined
grained brown ash
• In pyroclasti...
Exercise 6
• Rapid-Fine grained –aphanitic-grains cannot
be seen without magnification-rapid cooling
general extrusive(abo...
• Rapid- glassy-shiny-looks like glass
• Slowly-pegamatic-course grained pegamatic-
Porphorytic-
More than two rates
• pyroclastic
Table 2 page 57
• Felsic-silca content-64%-75%-K-feldspar,Na-
plagioclast-quartz
• Intermediate-silica content 52%-63% -ca...
Table 2 page 57
• Mafic -silca content-45%-57%-Ca-plagioclase,
olivines and pyroxenes-aluminum –calcium-
iron and magnesiu...
TO THE LEFT-PAGE 58
• GRANITE PEGAMATITE
• RYOLITE PEGAMATITE
• PORPHRITIC GRANITE
• PORPHRITIC RYOLITE
– OBSIDIAN
– PUMIC...
Exercise 7
• Use the igneouse rock set –(your exam kit)
• Can just read through exam
Origin and evolution of magmas
• Decompression melting
• Flux melting
• Heat transfer melting
Exercise 8
• Bowen’s reaction series
• Insight’s from melting experiments
• (a) plagioclase feldspar-minerals crystalize b...
• 8-B-this is unlikely-mineral with high melting
points are ultra mafic and to the left-
discontinuous
• Low melting point...
• 8c- from lowest
• Felsic-800oC-
• Intermediate-1050oC
• -mafic-1400oC
• -ultramafic-above -1400oC
• Partial melting
• Magmatic differentiation
• Assimilation
• Magma mixing
• 12 or 15
• 684 or 900
Aaaaaaaaaaaaaa rock exa maaaafelsic page 58  new
Aaaaaaaaaaaaaa rock exa maaaafelsic page 58  new
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Aaaaaaaaaaaaaa rock exa maaaafelsic page 58 new

  1. 1. ANSWER 72 TO 99 UPLOAD TO SLIDE SHARE • aaaaaaaaaaROCKEXAM aaaaaFELSIC PAGE 58 • THIS PLUS 3 OTHERS • 1. SLIDE SHARE • 2. GRADE LABS-9 OF THEM • 3. PDF CHAPTER 4-EMAIL KIDS -2 (TWO) AT A TIME-J5 • 4. FINISH SEDIMENTARY-YOUR DONE • 5.READ METAMORPHIC-GET PAID AT 5 AM
  2. 2. Take a box and the donow and hold your exam in your hand • Faith heart and skill (
  3. 3. • Different igneous rocks are formed depending on the presence of different minerals and how fast the magma cools. Some igneous rocks include pumice, obsidian, and basalt. The rapid separation of the gases from lava produces pumice, a rock with large air spaces in it, similar to a sponge. The rapid cooling of lava produces obsidian and fine-grained rocks such as basalt.
  4. 4. Page 51 • 3. • A.> i. crust has greater surface area • ii. > crust cools faster –has no concealed center – a ball does! • B. i. > plastic cools faster – does not hold heat like styrofoam • ROCK IS BETTER INSULATOR
  5. 5. PAGE 51 • 3. C. i. > Large cube 1 cm2 8 small cubes – approx 8 cm2-more area C. ii. > Small cubes cool faster C. iii. > small mass losses heat faster
  6. 6. Exercise 3 -52 • Phaneritic- course-cooled slowly-should have crystal-ions migrated slowly and formed crystals-nucleation possible • Aphaneritic-fine ( cools fast! Less time for Na+ to migrate-no crystal formation
  7. 7. Exercise 3- page 52 • A) same rock material • Regions close together- • 1st area cooled fast and was not viscous • 2nd area –cooled slow –and was very viscous
  8. 8. Exercise 3- page 52 • 3-D –shallow INTRUSIVE IGNEOUS ROCKS • -have-fine course grains • Than DEEP INTRUSIVE IGENOUS ROCKS • SHALLOW-INTRUSIVE-finer!!! • Deep-intrusive-not finer or course –from thick lava
  9. 9. Go right to excersice • Felsic-dense spotty material to the left • Intermediate • Mafic –less dense percentages to the righ
  10. 10. Lets all go to the do now-we will come back to this • Can use page 58 to complete this and hand directly in
  11. 11. Felsic • white mica" (muscovite • Quart • K –feldspar • biotite
  12. 12. FELSIC = fel-feldspar =sic-silica • Light weight- low specific gravity • Biotite, quartz and potassic feldspar • Ligth colored
  13. 13. 1. Microcline(K-Feldspar) • Microcline(K-Feldspar)
  14. 14. j5--2. Milky quartz sample
  15. 15. j5----yes--4. muscovite-FELSIC
  16. 16. mafic • Albite (plagioclase feldspar • Olivine • Augite --Pyroxene • . Hornblende -amphilbole
  17. 17. Mafic - “ma”---”fic” • Comes from ferric-mag-Mg –magnesium • Ferric-loves iron • Less silica • Calcium rich plagioclase • High specific weight • Fine grained • Dark colored
  18. 18. mafic--. Albite (plagioclase feldspar)
  19. 19. mafic==. Hornblende (amphibole)
  20. 20. mafic==. Augite (pyroxene)
  21. 21. mafic===Olivine . Mg-rich olivine crystallizes from magma
  22. 22. TO THE LEFT-PAGE 58 • GRANITE PEGAMATITE • RYOLITE PEGAMATITE • PORPHRITIC GRANITE • PORPHRITIC RYOLITE – OBSIDIAN – PUMICE • RYOLITE TUFT
  23. 23. PAGE 52 • 4 (B)-3a pyroxene-slow cooling rate wih aphanetic –large cubesstyrofoam walls • 4(B)-3b hornblende-aphanitic=fast, small cubes, plastic cups • 4(B)-3c dark colored –fine grained –aphanitic – fast-small cubes-plastic cups • 4(B)-3d-light colored –course grained- • -slow cooling rate wih aphanetic –large cubesstyrofoam walls
  24. 24. Lava rock and pumice • Porous igneous rock –bubbles have formed just as lava solidifies-the shape of the bubbles have been preserved in the lava • This occurs as magma rises to the surface • This is porous vesicular texture
  25. 25. Fragmental textures • Due to pyroclastic debris • Pyro –fire • Clast-broken • “large blocks or bombs” • Have crystals formed before eruption • Have tiny ash-pieces of rock inside
  26. 26. Exercise 5 • Which rock formed in ash fall? • C. volcanic rock fragments in a very fined grained brown ash • In pyroclastic flow? • This would be (a) kalauea in Hawaii • Finer grained-pyroclastic
  27. 27. Exercise 6 • Rapid-Fine grained –aphanitic-grains cannot be seen without magnification-rapid cooling general extrusive(above ) • Rapid-Pourous vesicular-spongy filled with large holes or small holes-rapid cooling followed by release of gas
  28. 28. • Rapid- glassy-shiny-looks like glass • Slowly-pegamatic-course grained pegamatic- Porphorytic-
  29. 29. More than two rates • pyroclastic
  30. 30. Table 2 page 57 • Felsic-silca content-64%-75%-K-feldspar,Na- plagioclast-quartz • Intermediate-silica content 52%-63% -ca-Na plagioclase, amphibole, pyroxene
  31. 31. Table 2 page 57 • Mafic -silca content-45%-57%-Ca-plagioclase, olivines and pyroxenes-aluminum –calcium- iron and magnesium • Ultramafic-silca content-39%-44%-olivines and pyroxenes • Have iron and magnesium
  32. 32. TO THE LEFT-PAGE 58 • GRANITE PEGAMATITE • RYOLITE PEGAMATITE • PORPHRITIC GRANITE • PORPHRITIC RYOLITE – OBSIDIAN – PUMICE • RYOLITE TUFT
  33. 33. Exercise 7 • Use the igneouse rock set –(your exam kit) • Can just read through exam
  34. 34. Origin and evolution of magmas • Decompression melting • Flux melting • Heat transfer melting
  35. 35. Exercise 8 • Bowen’s reaction series • Insight’s from melting experiments • (a) plagioclase feldspar-minerals crystalize by cont and discontinuos process • (b) pyroxene and amphibole-discontinuous reactions
  36. 36. • 8-B-this is unlikely-mineral with high melting points are ultra mafic and to the left- discontinuous • Low melting points –simple melting-biotite and Na-rich-feldspar –felsic igneous rocks • Minerals now crystalize by all three types • Simple-continuous-discontinuous
  37. 37. • 8c- from lowest • Felsic-800oC- • Intermediate-1050oC • -mafic-1400oC • -ultramafic-above -1400oC
  38. 38. • Partial melting • Magmatic differentiation • Assimilation • Magma mixing • 12 or 15 • 684 or 900

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