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Today Monday Next Wednesday Pre Cambrian Geology

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Presentation on theme: "Today Monday Next Wednesday Pre Cambrian Geology"— Presentation transcript:

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2 Today Monday Next Wednesday Pre Cambrian Geology
DUE: Coastal Geology Project Monday Paleozoic Tectonics LAB Geology of North America DUE: Choice of Fossil for Fossil Poster Next Wednesday Paleozoic Climate & Life Mesozoic Tectonics

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4 Outline of Pre-Cambrian Time

5 Age & Origin of Earth Oldest Rocks & Minerals Archean Tectonics Origin of Atmosphere & Life

6 The Oldest Terrestrial Rocks: Acasta Gneiss 4.0 billion years old!
Source: Sam Bowring/MIT

7 The Oldest Rocks on Earth : Meteorites 4.5 billion years old!
Source:

8 01_13and15.jpg

9 Zoomable Art PC Mac 01_Featured_Art.jpg

10 23_03.jpg

11 Hadean: Hell on Earth? (Fig. 13-4)

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13 Oldest Rocks & Minerals

14 Archean Crust

15 World’s Oldest Rock: Acasta Gneiss 4.0 b.y. (Fig. 12-25)

16 Source: http://www. gly. fsu

17 World’s Oldest Mineral Grain: Zircon form Jack Hills Australia
Source:

18 Australian Craton Source:

19 Jack Hills Metaconglomerate
Source:

20 World’s Oldest Sedimentary Rock: Isua Metasediments 3.8 b.y.
Source:

21 Source: http://www.geology.wisc.edu/zircon/Earliest%20Piece/Earliest.html

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23 Archean Tectonics

24 Why so little Archean Crust?

25 Granulite/gneiss and greenstone belts

26 Granulite Greenstone Belts

27 Archean Pillow Basalts

28 Formation of greenstone belts Arc Model

29 Formation of greenstone belts Arc Model (Fig. 13-5)

30 Pre-Cambrian of North America

31 13_06.jpg

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33 For Monday 5/17 On-line Readings Early and Late Paleozoic Events


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