1 Origin of Earth/ Hadean Eon Brad Hubeny The Precambrian Precambrian Cratons and Shields The Big Band & Origin of Universe ~13.7 Billion Years Ago Origin of the Solar System: The Nebular Hypothesis 4.56 Ga BP The Nebular Cloud and Different Initial Compositions
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Origin of Earth/ Hadean Eon
Brad Hubeny
The Precambrian
Precambrian Cratons and Shields The Big Band & Origin of Universe~13.7 Billion Years Ago
Origin of the SolarSystem: The
Nebular Hypothesis
4.56 Ga BP
The Nebular Cloud and DifferentInitial Compositions
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Evolution of Early Earth The Moon • Formed 4.5 Ga• Similar in
Composition toMantle: So What?!?
• Lightly-CrateredMaria younger than3.8 Ga: So What?!?
The Moon’s Origin (4.5 Ga)The Early Earth
Why Oceanic Crust in Hadean? How old is the crust?
Acasta Gneiss, SlaveProvince, NWT
Zircon Crystal:4.2 Ga BP(Iizuka et al., 2006)
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Jack Hills, W. Australia (4.4-4.5Ga!!)
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