GEO 102 Lecture 26 Outline of Last Lecture I Introduction of free oxygen Outline of Current Lecture II The Sequence of Events III Big Picture of Life Current Lecture The Sequence of Events Why do geologists divide time up the way we do o Mostly due to fossils Appearance and extinction o Rarely rock type o Sequence Sea level o Age dates o Geochemistry Big Picture of Life Cenozoic o Age of mammals o Flowering plants rule o Modern seas Mesozoic o Age of reptiles o Paleozoic style seas Paleozoic o Origin of most modern body styles o Life moved from sea to sea o Benthic epi benthic and endo benthic in or on the sea floor and around the sea floor o Pelagic nektic o planktic These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute
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