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Period: to
Iurena 6
geological timescale -
Cambrian
Trilobites appear and shelled brachiopods appear. -
silurian
Eurypterids meaning sea scorpions, sea stars and coral become more common -
devonian
Huge plants begin to develop, early amphibians form. -
Permian
Appalachian Mountains are created because of the collision of tectonic plates and savannah forms. -
cretaceous
first flowering plants appear- angiosperm. Impact hypothesis- dinosaur mass extinction. -
Tertiary Pliocene
various species migrated between continents across land bridges. First modern horses appear. -
Tertiary Eocene
Flying squirrels,whales, and bats appear. -
jurassic
flying reptiles are in the air called pterosaurs. -
triassic
squirrel sized dinosaur and the first forest dwelling mammals appear. This is called ichthyosaurs -
Carboniferous mississippian period
Swamps and forest cover the land, Early reptiles resembling large lizards appear -
Ordovician
Very little plant life during this period. Fish did not have jaws nor teeth and their bodies were covered with bony plates. -
Carbonferous pennsylvanian period
Giant cockroaches appear, Coal deposits form. -
Tertiary Paleoncene
Fist primates evolve. Small rodents evolve. -
Tertiary Oligocene
Himalayas develop due to uplifting caused by the indian subcontinent and eurasian continents colliding -
Quaternary Pleistoncene
Homosapien appeared and are hunters. Species that did not evolve to survive extreme cold moved to warmer climate areas or became extinct. -
Tertiary Miocene
Antarctic icecaps begins to form. Mediterranean Sea dries up and refills several times due to tectonic forcesa dn dropping sea levels -
Quaternary Holocene
The last glacial period ended and sea levels rose, Great lakes formed. Modern human developed agriculture and used tools made of bronze and iron -
Quaternary Anthropocene
Some students believe that human kind has caused mass extinctions of plant and animal species,pollutes the oceans, and altered the atmosphere. There is an argument as to when this epoch began, some scientist think it began with the industrial age in the early 1800's others think it began with the atomic age in the 1950s
