BIOC50H3 Lecture Notes - Lecture 2: Absolute Dating, Cyanobacteria, Lead
23 Oct 2015
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Document Summary
Strata layers of rock/soil with internally consistent characteristics that distinguish them from other layers; strata tells us what was happening to the earth at the time. There is a period formation table that should be memorized the time periods correlate with the strata (ex: mesozoic = era, jurassic = period, 200 = mya) Usually a mass extinction event separates each period. The geological column will only have a subset of what happened in the time period we are analyzing. Ex: grand canyon different parts of the grand canyon will have different strata in order. It will always go up based on the period. Fossils formed from dead organisms very rapid; typically have to be buried rapidly and in areas without o2 amber is a type of form for a fossil to be made. Some fossils can be mineralized or made using collagen and salt; able to be used for protein sequencing.
