GGR101H1 Lecture Notes - Lecture 4: Late Glacial, Great Oxygenation Event, Cambrian Explosion
28 Feb 2016
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Lec 4 => topic: the environmental prequel: from our earliest ancestors to the late glacial maximum lecture outline: cover global climate and evolutionary dynamics on our planet from ~1 mya to ~25 kya. Part 1: geochronology + our early ancestors: overview of geochronology or geological history history of our planet divided into groupings. Periods (lower: history of our planet divided into major groupings of time. Precambrian period from the formation of our planet to the first hard-bodied organisms accounts ~90% of earth"s geological history: earliest supereon: precambrian. Made up of the following eons hadean (oldest) ** stable crust by 4. 4 bya based on zircons the precambrian not well understood little remains of the precambrian world. Precambrian rocks preserved well in australia ancient + modern theories of the origins of life on planet earth. 4th century athens: believed in spontaneous generation early + medieval christianity. 1st 17th century middle east + europe: spontaneous generation - maintained.
