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570 BCE
Cambrian Period 570-500 MYA
This is the first geologic time period of the Paleozoic Era and the period lasted for about 53 million years. -
Period: 544 BCE to 245 BCE
Paleozoic Era
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488 BCE
ordovician period 488-443 MYA
In this period there was a huge variety of marine life and primitive plants began to appear. -
Period: 225 BCE to 66 BCE
Mesozoic Era
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145 BCE
Jurassic period 201-145 MYA
In this period this is the second geological period of the Mesozoic Era and dinosaurs first appeared in this time. -
65 BCE
cretaceous period 145-65 MYA
This period was the longest period of the Mesozoic Era and it followed the Jurassic Period. -
65 BCE
Tertiary period 65-2.5 MYA
This is the age of large mammals like mammoths or the giant sloth. -
Period: 65 BCE to 2 BCE
Cenozoic Era
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60 BCE
Devonian period 419-358 MYA
In this period land living vertebrates appeared during this period which means animals that had a spine. -
60 BCE
Carboniferous period 358-298 MYA
Famous for its large swamps at this period. -
50 BCE
Triassic Period 251-201 MYA
This was the beginning of the earliest mammals. -
46 BCE
Permian period 298-251 MYA
largest mass extinction on earth from the supercontinent pangea splitting. -
24 BCE
Silurian period 443-416 MYA
underwater life thrived during the Silurian period. -
1 BCE
Quaternary period 2.588 MYA-11.7 TYA
In this period there was an ice age and large mammals still existed at this time.