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Guide Fossil: Stromatolites Geological events: There was a lot of volcanic activity, because of this, the lithosphere, the hydrosphere, and the atmosphere were form Climate events: Formation of the primitive atmosphere, the appearance of the first liquid oceans, and episodes of extreme global glaciations
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It happen in the ocean 3.8 billions of years -
Oxygen changes the atmosphere and allows for new, more complex forms of life. -
Some bacterias started to produce oxygen -
appearance of cells with core and a complex form -
Dominate the world -
Guide fossil: Trilobites Geological events: Intense tectonic, climatic, and biological activity, which laid the foundations for the evolution of terrestrial life and the configuration of modern continents. Climate events:It began warm, then experienced glaciations, later humid environments that generated coal, and ended with an arid climate in the Permian.
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85% of marine species were lost due to glaciation -
It occurred mainly during the Carboniferous period, between 360 and 300 million years ago -
75% of the species disappeared due to changes in sea level and anoxia -
Reptiles appeared on Earth approximately 320 million years ago, during the Carboniferous period. -
the largest in history, losing more than 90% of species -
Guide fossil: ammonites Geological events: Fragmentation of Pangaea, the opening of the Atlantic Ocean, intense volcanic activity, prolonged marine transgressions, and the mass extinction of the Cretaceous that marked the end of the era. Climate events: Warm and humid climate across much of the planet, without major glaciations, with seas invading the continents and an ending marked by abrupt changes associated with the meteorite impact and massive volcanism.
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a lot of reptiles and giants were lost because of vulcanos and a change in the wheater
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It was in the Mesozoic more than 145 millions of years -
the most famous extinction, the dinosaurs became extinct due to a meteorite impact -
Mammals evolved into many forms: whales, bats, primates, elephants, and humans -
Guide fossil: Nummulites Geological events: Formation of major mountain ranges such as the Himalayas and the Andes, the closure of the Tethys Sea, the union of North and South America, and the current configuration of the continents and oceans Climate events: Globally warm and stable climate, without major glaciations, with seas invading the continents and an ending marked by abrupt changes
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The hominids appear 7 millions years ago but the homo-sapiens appear 300 thousand years ago