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Hadean/Pre-Archean Eon 4.6 BYA
There was no atmosphere yet so you could not breath, earth right then would have been forming its plates. Earth was still cooling off. -
Archeon Eon 3.8 bya
1st. The earliest forms of life were forming and called stromatolites
2nd. you still couldn't breath. -
The Proterozoic Eon 2.5 bya
stromatolites diverity increases then population declines
herbivores begin to increase.
herbivores increase because they feed on the stromalites. -
Phanerozoic 542 mya
niches were available now
plants were now able to create photosynethis thus creating oxygen for further life -
Paleozoic era 570 mya
the paleozoic era was when the most important forms of life were formed. Multicelled animals undergoes an explosion of diversity.
At the end a mass extinction wipes out 90% of marine animals. -
Cambrian 570 mya
many of the major species were in this period like hard shelled or plated marine animals. -
Ordovician 500 mya
red and green algea, primitive fish,cephalopods, and other marine inveretabrates are indigeonous. -
Silurian 400-430 mya
thsi period experienced the stabilization of earths climate.
a huge diversity of fish occurs including jawless fish. The first fresh water fish began to occur. -
Devonian 395 mya
The first vascular plants occured in this period leading up to todays vascular plants. The first tetrapods or land living vertabres were one of the 2 major groups to clonize the land. Anthropods were also one of the major groups to colonize land. Marine animals diversified into plants like crinoids. -
Carboniferous 345 mya
This period was the time when the largest amount of coal deposites were formed into todays modern world. Another great innavation occured in that time, THE EGG. This allowed tetrapods to not fear of desiccation. -
Permian 280 mya
This was the end for two things, the paleozoic and life then itself.
This affected all of the organizms both marine and terrastrial. -
Mesozoic era 225 mya
This era was when flora and fauna changed dramaticly. The dinosaurs and the birds also became more and more diverse. -
Triassic 225 mya
It started approximetly 225 million years ago it was the time that the world continent pangaea existed which altered global climate and ocean circulation. Triassic also follows to the largest extinction event in history. The orginisms of the Triassic were listed in 3 groups the hold overs the new groups that existed briefly and new groups like the dinosaures that went and counquered the mesazoic era. -
Jurassic period 190-195 mya
large reptilian herbivores fed on lush ferns and palm like cycades small but carnivorous dinosaurs hunted the plant eaters.
The jurassic period was named for the Jura mountains. -
Cretaceous period 136 mya
many insect groups or species,modern mammals, birds, and the first flowering plants were thriving in this period
the breakup of pangea increased diversity in animals living in the north and south continents.
no mass extinction or burst in diversity occured -
Cenizoic era 65 mya
The Cenezoic era took place 65 million years ago they sometimes call it age of the mammals because the largest land animals have been mammals at that time. The Cenezoic era split into 3 periods the Paleogene the Neogene and the Quaternary. -
Tertiary period 65 mya
The tertiary period started 65 million years ago it was the major start of the mammals and was the start of the cooling of the global tempratures. It also lead to the current configuration of the continents. -
Paleocene era 65 mya
Started approximetly 65 million years ago after most reptiles/ dinosaures where wiped off the face of the earth. And they were all mostly filled in with little mammals,and large flightless birds which mostly became predators. -
Eocene era 59 mya
it started approximately 59 million years ago. it has extremely hot and humid climate with green house conditions. Fossils would be mammals, primates, elephants, whales, and birds. -
Oligocene era 38 mya
It started approximately 38 million years ago mammals continue to flourish and grow larger apes start to appear and the first elephants with trunks start to appear. And also climate is warm but starts to cool. -
Miocene era 26 mya
Started approximately 26 million years ago. The Mediteranian sea dries up and almost all modern mammal and bird families start to appear and are present. Modern carnivores start appearing and humenoid apes flourish and start to diversify. -
Pliocene era 12 mya
Started approximately 12 million years ago. Big Gibraltar waterfall fills up the Mediterranean sea the climate stays cool and it is dry and seasonal. Fossils found would be modern plants and animals, grasslands and the first hominids appear. -
quaternary
This period was divided into 2 pleistocene and the holocene. Glaciations were formed in this small period, this period also included the earliest people in which they eventually evolved. -
Pliestocene era 3 mya
It started approximately 3 million years ago. The climate there was cold and dry world wide. Neandrathals dissapear and modern humans appear and large mammals thrive. -
Holocene epoche 10000 years ago
The holocene epoch was the closest to our modern era. The first people were now indigenous on our planet. The glaciation process was soon followed after this.
