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Evolutionary History. Evolution does not occur in a vacuum; it depends on: Geology – distribution of land and water Climate – temperature, precipitation, latitude, ocean currents Chemistry – water, atmosphere, soil Other organisms

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evolutionary history
Evolutionary History
  • Evolution does not occur in a vacuum; it depends on:
    • Geology – distribution of land and water
    • Climate – temperature, precipitation, latitude, ocean currents
    • Chemistry – water, atmosphere, soil
    • Other organisms
      • Predation, parasitism, mutualism, competition, habitat changes
    • Fate
      • Extraterrestrial (and earth-bound) caused extinction events
      • Probabilities of dispersal, gene change, etc.
    • Mechanisms of evolutionary change
geology
Geology
  • “Big” time - Geological time periods
  • Plate tectonics & continental drift
time geological time periods
Time - Geological time periods

Eons

Eras

  • Hierarchical units of geological time
  • Defined by changes in fossils
  • Eras named after the animal fossils
  • Extinctions occur at boundaries

Recent animals

Middle animals

Visible animals

Old animals

540 mybp →

First animals

geological time
Geological time

Know

eras (named after animal life as fossilized)

absolute timing of eras

relative timing within the eras of important events (see our timeline)

you don’t need to remember the periods, but if you want to, learn them

Mnemonics

UC Berkeley Time Machine

65 mybp →

245 mybp →

540 mybp →

plate tectonics continental drift
Mechanism

New crust at mid-ocean ridges

Sea floor spreading, carries continents

Subduction under continents

Christopher Scotese Web Sites

Walk Thru Time – 580 concept frame

Plate tectonics & continental drift
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