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formation of the ready-sphere, hydrosphere and atmosphere, known as a geological event given in the precambrian in the hadic aeon ,also there is great volcanic activity -
The precambrian is the first stage in the history of the earth, being the longest stage and it occurs in three eons: Hadic, Archaic and Proterozoic.
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Thanks to the great volcanic activity there is a chemical evolution forming the first forms of life (unicellular organisms) known as a biological event. -
Thanks to this great volcanic activity, there is also the origin of the oceans and with the most forms of life they inhabit life every time. -
This apparition occurs between the Archaic eon and the Proterozoic Eon -
Rodinia formed at c. 1.23 Ga by accretion and collision of fragments produced by breakup of an older supercontinent. -
Rodinia was fractured due to magmatic movements in the earth's crust, accompanied by strong volcanic activity. -
Although the exact causes for ice ages, and the glacial cycles within them, have not been proven, they are most likely the result of a complicated dynamic interaction between such things as solar output, distance of the Earth from the sun, position and height of the continents, ocean circulation -
Pannotia was formed when Laurentia was located adjacent to the two main South American continents: Amazonia and Río de la Plata, after the supercontinent Rodinia broke up. -
Due to this change in the atmosphere lacking in oxygen, as it was in the precambrian, it became an oxygenating atmosphere, allowing the appearance of new invertebrate species, such as sponges, trilobites, jellyfish, etc., all this during the Cambrian period. -
The Paleozoic is the first era of the Oen Phanerozoic and spans from 540 million years to 245 million years ago. It is subdivided into six periods that are grouped into three sets. They form what are known as ages (ages of invertebrates, ages of fish and ages of amphibians). The periods are as follows: Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.
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The breakdown of Pannotia was accompanied by rising sea levels, dramatic changes in climate and ocean water chemistry, and rapid diversification. This occurred during the Ordovician period. -
Some of these species were the Ostracoderm fish, the anelids and the mollusk of the genus Neopilina. This also occurs in the Ordovician period. -
It occurred at the end of the Ordovician Period about 450 million years ago, being the most intense glaciation on record since multicellular organisms appeared, and which was responsible for the extinction of more than 80% of the species. -
This exition was due to the great ice age of the Ordovician -
Non-flowering plants (gynosperms) such as the fern, this occurs in the so-called Silurian period -
In Europe and North America. -
Some of these species were the primitive shark and the coelacanth,
and this occurs in the Devonian. -
This extinction occurs in the Carboniferous period, a little before the so-called Carboniferous glaciation. -
The so-called age of amphibians originates at the end of the Devonian period and the beginning of the caboniferous, It passes from the ocean to the terrestrial . -
This occurs at the end of the Carboniferous period -
At the end of the Carboniferous period. -
This due to the great volcanic activity at the end of the Permian period and the end of the Paleozoic era. -
The Mesozoic is the second era of the Phanerozoic eon and spans from 245 million years to 66 million years ago. It is subdivided into three periods, which are grouped together forming what is known as the Age of the reptiles. These periods are the Triassic, Jurassic, and Cretaceous.
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The first mammals arose from the cynodonts, a group of reptiles. The current groups had their origin in this era.
some of those dinosaurs were Pterosaurus, Ichthyosaurus and as the first mammal the cynodont.All this happened in the Triassic period. -
At the end of the Paleozoic all the plates with continental crust were grouped in the great continent Pangea, emerged and partly bordered by waters of shallow seas and surrounded by a plate of oceanic crust, on which the Panthalassa ocean was located. The grouping of all the continents in a single block or plate is especially unstable, hence, very quickly a major fracture tectonics began that ended with the fragmentation of Pangea. -
In the Jurassic period, these plants dominated with species such as: Ginkgo or Albeto leaves. -
At the end of the Jurassic period, certain species of birds and lizards appear, such as the Archaeoptreryx (bird) and the Tuatara (lizard). -
The first angiosperm plants appear and with them the 4th mass extinction of species.This occurs during the cretasic period -
Dinosaurs dominated almost at the end of this era, excatamnete in the cretasic period, some of these species were the tricerapts, the stegosaurus and the tyrannosaurus. -
This possible impact of a meteorite against the earth could cause the mass extinction of almost all species, and in this way closes this Mesozoic era. -
The Cenozoic is the third age of the Phanerozoic eon and covers from 66 million years ago to the present, it is considered the age of mammals, it is subdivided into three periods: the Paleogene, the Neogene and the Quaternary which is the current period.
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The evolution of birds and mammifers also continues, these underwent a great development forming during this time of the Paleogene and the following, the current species. -
Africa and India move north and the mountain ranges of southern Europe (Pyrenees, Balkans), and Asia (Himalayas, Caucasus) emerge -
Appeared at the end of the Paleogene period. -
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They appear in the neogene, homo habilis evolves to homo erectus, then this evolves to neanderthanlensis. -
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These species originated shortly before the ice age such as the saber-toothed tiger and the mammoth. -
At this time, homo Neanderthalensis is extirpated and a new evolved species emerges from a common ancestor. this species is homo sapiens and appears in the quaternary period