1

Today:Pick up iclicker NOW

1) Go over Exam 2 2) (at 9:50) Unconformity Review: iclickers out Finish: Telling Time Geologically4) (at 10:35) In Class Exercise: Relative Dating

(page 93 class handouts)

Next Class:1) Grand Canyon Talk2) Google Earth Grand Canyon (Time Permitting)

Monday, November 25, 13

2

Which unconformity is depicted at #1?A: Disconformity B: Angular unconformity C: Nonconformity

#1

#2

#3

#4

Monday, November 25, 13

3

Which unconformity is depicted at #2?A: Disconformity B: Angular unconformity C: Nonconformity

#1

#2

#3

#4

Monday, November 25, 13

4

Which unconformity is depicted at #3?A: Disconformity B: Angular unconformity C: Nonconformity

#1

#2

#3

#4

Monday, November 25, 13

5

Which unconformity is depicted at #4?A: Disconformity B: Angular unconformity C: Nonconformity

#1

#2

#3

#4

Monday, November 25, 13

Relative Datingvs.

Absolute Dating

6

(Geochronology)

Monday, November 25, 13

The Geologic Time Scale

54225165.5

4.6 Ga 7

Monday, November 25, 13

Radioactive Decay (alpha decay)

8

Parent Daughter

Monday, November 25, 13

Radioactive Decay (beta decay)

9

Parent Daughter

Monday, November 25, 13

Radioactive Decay (electron capture)

10

Parent Daughter

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11

Radioactive Decay Series

Monday, November 25, 13

12

Which type of radioactive decay produces a proton(atomic number goes up)?

A) Alpha decayB) Beta decayC) Beta captureD) A & BE) B & C

Monday, November 25, 13

13

Which type of radioactive decay maintains atomic mass?

A) Alpha decayB) Beta decayC) Beta captureD) A & BE) B & C

Monday, November 25, 13

14

Half Lives

Coin Flip Exercise

Monday, November 25, 13

Radioactive Decay and the concept of Half lives

K-spar Hornblende Zircon Muscovite

15

Monday, November 25, 13

Radioactive Decay and the concept of Half lives

K-spar Hornblende Zircon Muscovite

15

Igneous Minerals

Monday, November 25, 13

Which Isotope is Best?

16

Monday, November 25, 13

Metamorphisms and

Geochronology

Zircon

17

Monday, November 25, 13

Metamorphisms and

Geochronology

Zircon

18

0.1 mmSHRIMP at Stanford Univ.(Secondary Hi-Resolution ion microprobe

Mass Spectrometer)

Monday, November 25, 13

Sedimentary Rocks and Geochronology

Zircon

19

Monday, November 25, 13

20

Sedimentary Rocks and

Geochronology

Monday, November 25, 13

21

(C14) Radiocarbon Geochronology

Monday, November 25, 13

22

Cosmogenic Radionuclide Geochronology

Monday, November 25, 13

23

Cosmogenic Radionuclide and Optically Stimulated luminescence (OSL) Geochronology

Monday, November 25, 13

24

Cosmogenic Radionuclide and Optically Stimulated luminescence (OSL) Geochronology

Monday, November 25, 13

Climate-controlled Landscape Evolution

Monday, November 25, 13

26

Page 93 Class Handouts

Monday, November 25, 13

27

Monday, November 25, 13

28

E

Monday, November 25, 13

29

E

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30

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31

Monday, November 25, 13