NATS 1540 Final: Extinction of Dinosuars - Final Notes, summary of readings and lecture notes
7 Dec 2017
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What you need to know for the final exam: from the coursekit: A cacophony of causes, (know fully the extinction events set out and explained) Comparer to ancient civilization, must be evidence to support hypothesis. Discovered by sir roderick impy murchison 1841, mountains of russia. Rocks from the mountain were clearly older than the carbon rocks from britain/ younger triassic rocks of. Alverez! meteorite impact, increase concentration of iridium at the cretaceous-tertiary boundary at gubbio, italy. Concluded that it was not a change in the rate at which the sediments had been preserved, the increase in iridium was too great! impact of meteorite/ comet ended the reign of the dinosaurs. Struck yucatan peninsula was 10-15 km in diameter, cavity of 100km in diameter, crater of. Event can be separated into 2 layers (rock vaporized by impact): lower layer ejected by impact and upper layer of atmospheric fallout. This dust obscured sun and cooled earth, stopping photosynthesis= extinction.
