EOSC 114 Lecture Notes - Lecture 30: Chicxulub Crater, Siberian Traps, Mid-Ocean Ridge
20 Apr 2018
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Clowns only shoot ducks carrying people that just can"t play quietly. List the big 5 mass extinction events and their order thru time. Describe late ordovician and permo-triassic extinction: permo-triassic extinction. Discuss significance and magnitude of the p/t event. Discuss the causes and effects of the event: k/pg case study. Describe the character of extinctions at the k/pg boundary. Discuss the evidence used to support the k/pg impact. Describe location and probable nature of the k/pg impactor. Describe the initial and long-term effects of the impact and their environmental consequences. Consider other potential causes of the k/pg environmental collapse. Permian/triassic (largest extinction event: permits evolution of dinosaurs) What causes mass extinctions: biologically-based - extinctions, but generally not massive. Mosses may have contributed to late ordovician ice age (and subsequent species extinction) Mosses break down rocks which increases co2 absorption, lowering global temperatures.
