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A Brief History of Earth. /Notes/. Image by: soumitra911. NASA, NOAO, ESA and The Hubble Heritage Team (STScI/AURA). NASA. /Hadean/. 4.6 to 3.8 billion years ago. /Hadean/ Surface. Began mostly molten. /Hadean/ Surface. 1 st crust formed after 100 million years.

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slide1

A Brief History of Earth

/Notes/

Image by: soumitra911

slide4

/Hadean/

4.6 to 3.8 billion

years ago

slide5

/Hadean/Surface

Began mostly molten

slide6

/Hadean/Surface

1st crust formed after 100 million years

Image: Bread by Sifu Renka

slide7

/Hadean/Atmosphere

Came from gases erupted by volcanoes

USGS/J.D. Griggs

slide8

/Hadean/Atmosphere

mostly carbon dioxide (CO2)

http://www.flickr.com/photos/zrahen/11733545/

slide9

/Hadean/Major events

Earth formed

(4.6 billion years ago)

NASA/JPL-Caltech/T. Pyle (SSC)

slide10

/Hadean/Major events

Moon formed

(4.5 billion years ago)

NASA

slide12

/Hadean/Major events

Late Heavy Bombardment

Don Davis, NASA

slide13

/Hadean/Major events

4.1 – 3.8 billion years ago

http://commons.wikimedia.org/wiki/File:Moon_Dedal_crater.jpg

slide14

/Archean/

3.8 to 2.5 billion

years ago

slide15

/Archean/Surface

Many more volcanoes

than exist today

http://upload.wikimedia.org/wikipedia/commons/7/7f/Tarvurvur.jpg

Image by: Taro Taylor

slide16

/Archean/Surface

First permanent continents

Image by: Erica Marshall

slide17

/Archean/Atmosphere

Image by: groovehouse

Still very little oxygen

slide18

/Archean/Atmosphere

CO2

methane

Image by: patrick k. lauke

Image by: n8kowald

slide19

/Archean/Major Events

First evidence of life

Image by: AJC1

slide20

/Archean/Major Events

First evidence of life

Image by: cheukiecfu