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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

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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

mafic

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

mafic

• Albite (plagioclase feldspar • Olivine• Augite --Pyroxene• . Hornblende -amphilbole

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

• A. pyroxene• -slow cooling rate with aphantic large cubes –

styrofoam wall

• B. hornblende• -aphantic –fast-small cubes- plastic cups

• C. dark colored rock• (fine grained) aphantic –fast-small cubes-

plastic cups

• D. light colored• Phaneritic-(large grains) large cubes-stryofoam

wall

Ex 5

• .C. is from ash fall• .A.is from pyroclastic flow

Ex 6 and ex 7 –need kits

Figure 8 bowens reaction series

Ex 9-is palisades hill