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Period: 541 BCE to 252 BCE
PALEOZOIC ERA
The Paleozoic Era began 541 million years ago and ended about 252 million years ago. In other words, its duration was approximately 290 million years. It ranges from the appearance of animals with shells or exoskeletons, to the emergence of the first amphibians and reptiles. -
Period: 541 BCE to 485 BCE
CAMBRIAN
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485 BCE
THE CAMBRIAN EXPLOSION
The Cambrian explosion is known as the event that occurred during the Cambrian period in which most of the current animal phyla appeared. That is, when we talk about the Cambrian explosion, we are talking about the origin of the animals that inhabit the Earth today. This process occurred over millions of years, and allowed much more complex forms to evolve from very simple organisms. -
Period: 485 BCE to 444 BCE
ORDOVICIAN
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450 BCE
21 HOURS- ORDOVICIAN
In this period, a day had 21 hours and there were no animals on land due to the lack of oxygen in the atmosphere. Fossils abound, among which trilobites stand out, and oil and gas deposits were formed in some regions. -
Period: 444 BCE to 419 BCE
SIRULIAN
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430 BCE
FIRST PLANTS- SIRULIAN
In the Silurian the first plants appeared -
Period: 416 BCE to 359 BCE
DEVONIAN
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380 BCE
THE FIRST AMPHIBIANS EMERGE-DEVONIAN
The first amphibians emerge. At the end of the period there was the Devonian mass extinction, severely affecting marine life. During the Devonian, oil and gas deposits were formed in some areas. -
Period: 359 BCE to 299 BCE
CARBONIFEROUS
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320 BCE
THE SEA- CARBONIFEROUS
In the early Carboniferous, the global drop in sea level that occurred at the end of the Devonian was reversed, and it rose, creating widespread epicontinental seas. There was also a decrease in polar temperatures in the south, in fact southern Gondwana was glacial throughout the period. -
Period: 299 BCE to 251 BCE
PERMIAN
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270 BCE
THE MASS EXTINCTION- PERMIAN
In the permian there was a mass extinction of up to 96% of the animals, this due to the intense volcanic activity in the basalt volcanic formations of Siberia and the emission of methane from the bottom of the sea -
Period: 251 BCE to 66 BCE
MESOZOIC ERA
The Mesozoic Era is known as the Secondary Era or the age of the dinosaurs. It lasted 186 million years, beginning 250 million years ago and ending 66 million years ago. It is known as the age of the dinosaurs because it was during this period that these gigantic animals populated the earth -
Period: 251 BCE to 201 BCE
TRIASSIC
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230 BCE
BACK TO LIFE- TRIASIC
life slowly recovered in the first half and dinosaurs dominated the world in the second half. The Triassic period saw the evolution of the first true mammals and the first flying vertebrates called pterosaurs. -
Period: 199 BCE to 145 BCE
JURASSIC
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150 BCE
DINOSAURS-JURASSIC
This period is characterized by the hegemony of the great dinosaurs and by the split of Pangea into the Laurasia and Gondwana continents. From the latter Australia was split off (in the Upper Jurassic and early Cretaceous), just as Laurasia split into North America and Eurasia. -
Period: 145 BCE to 66 BCE
CRETACEOUS
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100 BCE
THE NEW EXTINCTION-CRETACEOUS
the great mass extinction event occurred that wiped out not only most of the dinosaurs on Earth, but also 75% of life on the planet. -
Period: 66 BCE to 2
TERTIARY
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Period: 66 BCE to 100
CENOZOIC ERA
The Cenozoic era began about 65 million years ago and is known as the Age of Mammals, as it is the dominant group of vertebrates in terrestrial ecosystems, which replaced the dinosaurs of the Mesozoic. This stage is known for the geographical displacements that occurred over the years. -
40 BCE
MAMMAL- TERTIARY
The old tertiary period included Paleogene and Neogene. End of recent ice age and rise of human civilization. Flowering and subsequent extinction of many large mammals (Pleistocene megafauna). Homo habilis appears and anatomically modern humans develop. -
Period: 2 BCE to 100
QUATERNARY
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10
HOMO SAPIENS-QUATERNARY
It was during the Quaternary when Homo sapiens appeared on Earth. ... In turn, large species, both plant and animal, became extinct, and birds and mammals were the vertebrates that dominated the Earth.