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Precambrian 4600 MA
EVENT 11 Nearly half of the valuable mineral deposits in the world occur in the rock of this period. EVENT 10 The presence of stromatolites indicates that shallows seas cover much of Earth during intervals in this period. -
Period: to
rkuo period3
geological timescale -
Cambrian 542 MA
EVENT 22 Trilobites appear. EVENT 23 Shelled brachiopods appear. -
Ordocivian 488 MA
EVENT 30 Colonies of tiny invertibrates call graptolites flourished and vertibrates appear, fish did not have jaw or teeth and their bodies were covered with bony plates. EVENT 8 Appalachian Mountains are created because of the collision of tectonic plates and savannahs form. -
Silurian 444 MA
EVENT 24 Eurypterids (sea scorpions), sea stars and corals become more common. EVENT 33 Vascular land plants and animals such as scorpions begin to evolve on land. -
Devonian 416 MA
EVENT 31 Huge plants begin to develop, early amphibians formed. EVENT 37 Age of fishes, fish that can breath out of the water and spend time on land form. -
Carboniferous (Mississippian period) 359 MA
EVENT 2 Swamps and forests cover the land. EVENT mediterrian sea dries up and refills several time due to techtonics forcesa dn dropping sea levels -
pesylvanian period MA318
evet 4 giant cockaroaches appear event15 coal dposits form -
permian MA299
event 27 many early mammals became extinct,clams and snails flourish.event 38 envioronmental change cause mass extinction of sea invertibrates as the seas retreat. -
jurrassic MA200
event 3 flying reptiles called pterosaurs are in the air now. event21 early reptiles resembeling large lizards appear. -
triassic MA 251
event 16 welcome to the world od the dinosaur enter the squirrel sized dinosaur and the first forest dwelling mammals appear event34 ichthyosaurs are living in the ocean new invertebrates call ammonite develop. -
cretaceous MA 146
event5 first flowering plants appear antagiosperm. event 35impact hypothesis dinosaurs mass extinctions. -
palocene MA 65.5
event12 first primates evolve.event 29 small rodents evolve -
holocene MA1.8
event 28modern human develop agriculture and used tools made of broze iron. event19 the last glacial period ended and sea level rose great lakes formed. -
eoceneMA55.8
event 17 flying squirrel ,whales and bats appear event 26 first modern horses appear. -
oligocene MA33.9
event32 antartic icecaps begin to form. event25 worl wide temperatures drop about 4 degrees celcius 39.2 f -
miocence MA 23.0
event 20 speices that did not evolve to survive extreme cold moved to warmer climate areas or became extict. event 1 there is very little palantlife during this period. -
pliocene MA5.3
event 18 various speces migrated between continents across land bridges. event6 himalayas develop due to uplifting caused by the indian subcontinents and eurasian continents colliding -
pleistocene MA0.0115
events 9 homosapien appeared hunters. event8 appalachian MOuntains are created because of the collision of techtonics plates and savannahs form. -
antropocene MA current date
event7some scientist believe the human kind has caused mass extinctions of plant and animal species, polluted the ocean and altered the atosphere. event14 there is an arguement as to whenthis epoch began,some scintist think it began with industrial age in the early 1800s other think it began with with the atomic age in the1950s.
