9.1.1 Hadean Eon

Precambrian

It is set before the Phanerozoic eon, and composed of the Hadean, Archean, and Proterozoic eons

21 hours or approximately 88.3%

If you compress the GTS in 24 hours, how long is the Precambrian

Hadean Eon

It is the first and oldest of the 4 known eons in Earth’s history

4.5Ga to 3.85Ga

When did the Hadean Eon occur?

Giga annum or 1 billion years

Meaning of Ga

Big Crunch Theory; Big Bang Theory

The 2 theories of Universe formation

Red Shift

It is an example of Doppler Effect where it is moving away from the point of origin

Blue Shift

It is an example of Doppler Effect where it is nearing towards the point of origin

76% Hydrogen, 24% Helium

What was the chemical makeup of the Universe then

70% Hydrogen, 28% Helium, 2% others

What was the chemical makeup of the Universe now

Fission Theory; Capture Theory; Condensation Theory; Theia Hypothesis

The 4 theories of Moon formation

Big Bang Theory

What happened during 13.7 Ga

13.7 Ga

When did the Big Bang Theory happen

4.546 Ga

When did the Earth form

Formation of the Earth

What happened during 4.546 Ga

5.51 g/cc

Earth’s density

4.5 Ga

When did the moon form

Formation of the Moon

What happened during 4.50 Ga

Great/Large Impact Hypothesis

It is also known as the Theia Hypothesis

Theia Hypothesis

It is also known as the Great/Large Impact Hypothesis where a collision of a Mars-sized asteroid with Gaia/Geia, ejecting materials around Earth’s orbit coalescing to form the moon

Molten Earth

What is Gaia/Geia

3.3 g/cc

Density of Moon

Maria

It is the dark basaltic surface of the Moon

Terrae

The light anorthositic surface of the Moon

70km

How thick is the Moon’s crust

1000km

How thick is the Moon’s lithosphere

4.4 Ga

How old is the oldest mineral found

Zircon

What is the oldest mineral

Jack Hills, Yilgarn Craton, Western Australia

Where did the oldest mineral was found

Metasedimentary Quartzite

What is the host rock of the oldest mineral found

Formation of carbonate minerals, and depletion of atmospheric carbon dioxide

What happened during 4.4 Ga aside from the formation of the known oldest mineral

4.03 Ga

How old is the oldest rock found

Acasta Gneiss

What is the oldest rock found

Tonalitic Granitic Gneiss

What is Acasta Gneiss

Northwest Canada (Great Slave Lake/Slave Province)

Where did the oldest rock was found

4.03 Ga

How old is the oldest continental crust

4 Ga to 3.8 Ga

When did the first water formed

Formation of first water

What happened during 4.0 Ga to 3.8 Ga

They were brought to Earth by Carbonaceous Chondrite, also known as Late Heavy Bombardment

How did the first water were formed

Late Heavy Bombardment

It also formed the craters on the moon