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Cambrian
Earliest Marine Life, Triolobites dominant
-hard-bodied animals that fossilized much more readily than their soft-bodied precursors. These included brachiopods, which lived in shells resembling those of clams or cockles, and animals with jointed, external skeletons known as arthropods—the ancestors of insects, spiders, and crustaceans. -
Ordovician
Earliest Fish who doesnt have a jaw
- Earth's climate was warm and wet, with sea levels rising as much as 1,970 feet
-hard-bodied arthropods started eyeing opportunities on land. -
Silurian
First plants
Begain to grow -
Devonian
Armored Fish gets extincit
-planet was changing its appearance
-Age of Fishes, as it spawned a remarkable variety of fish
-cartilaginous fish, so-called because cartilage formed their skeletons, later gave rise to sharks and rays
-the bony fish, were covered in scales and had maneuverable fins and gas-filled swim bladders for controlling their buoyancy. -
Trassic
Tall trees begin to bloom -
Jurassic
Earliest birds,mamals and dinosaurs came to be -
Cretaceous
The last period of the Mesozoic Era, and spanning 80 million years, the longest period of the Phanerozoic Eon.
-Was a period with a relatively warm climate, high eustatic sea levels
-Extinct marine reptiles, ammonites and rudists and rudists while dinosaurs continued to dominate on land. -
Tertiary
-Age of the Mammals
- the beginnning of the Tertiary Period was very warm and moist compared to todays climate
-Palm trees grew as far north as greenland
-In the middle of the tertiary, during the Oligocene Epochm, the climate began to cool.
- The cooling continued and by the pliocene Epoch at the end of the tertiary period, an ice age had begun. -
Quaternary
- temperatures drop, ice sheets spread from the Poles and cover much of North America and Europe, parts of Asia and South America, and all of Antarctica -lants and animals that sought warmth and comfort toward the Equator return to the higher latitudes -modern humans were rapidly spreading around the globe
