GSC 102 Lecture Notes - Lecture 2: Ordovician Radiation, Cambrian Substrate Revolution, Cambrian Explosion
10 May 2017
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Universe: over time, gravity should be causing the expansion of the universe to slow down, however, the expansion actually appears to be accelerating. This acceleration is explained by dark energy: atoms and the milky way, as the universe expands and cools, they combine to form the simplest atoms, hydrogen and helium, variations in the cosmic background microwave show that the early. Proterozoic and the formation of earth"s third atmosphere: the proterozoic, laurentia forms around 1. 8 billion years ago, continental crust that has remained relatively stable for the past. 600 million years: becomes north america, 1. 6-1 billion years ago grenville orogeny is some of the first evidence for a supercontinent rodinia, john tuzo wilson (canadian) hypothesized the wilson cycle that the. Ediacaran: start making mineralized hard parts, but not the kinds that humans are made of. The ordovician and silurian: adam sedgwick thought welsh rocks were cambrian, while roderick. Murchison thought they were silurian both disproven by charles.
