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• Answers to tell class on Monday j5 ese 11 new

• And

• Characteristics of sedimentary rocks-new tracyweber

• 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 cm2

8 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-stryofoamwall

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