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• Answers to tell class on Monday j5 ese 11 new• And • Characteristics of sedimentary rocks-new tracy
weber• And• Agends foe first payday open this Sunday and
monday
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
PAGE 51
• 3.C. i. > Large cube 1 cm28 small cubes – approx 8 cm2-more area
C. ii. > Small cubes cool faster
C. iii. > small mass losses heat faster
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
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
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
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
mafic
• Albite (plagioclase feldspar • Olivine• Augite --Pyroxene• . Hornblende -amphilbole
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
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
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
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
Ex 4-interpreting Porphrytic textures
• Based on what you have deduced about cooling, how does a porphrytic texture form?
For page 53-See your sheet now
• Describe the cooling histories of • A. pyroxene• B. hornblende• C. dark colored rock• D. light colored rock
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