ERS120H5 Lecture Notes - Lecture 2: Asthenosphere, Ct Scan, Jack Hills
Document Summary
The earth is 4. 57 billion years old (comes. Oldest dated rocks on earth: 4. 03 b yr. Oldest dated minerals on earth: 4. 35 b yr (from the jack hills in australia) Oldest meteorites: 4. 57 b yr (formed at the same time as the planet; when they fall to the earth, they can be collected and aged) Amalgamated pellets of prosodist from the earliest formation of the solar system. Order of events: big bang theory, the solar system, the sun, oldest meteorites, earth, the moon. There was an explosion from an in nitely small point. Clusters started to form and from them formed galaxies and then solar system was formed. Nebula - forms from hydrogen helium and heavier elements left form the big bang, and previous star cycles. Condenses into a swirling disc, with a central ball surrounded by rings. As solar system spins, it attens into a disc.
