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Guide Fossil: Stromatolites Geological Events: Extensive volcanic activity, formation of the lithosphere, hydrosphere, and atmosphere Climate Events: Climate stabilization, first ice ages
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The first forms of life were simple, single-celled organisms called prokaryotes -
They were the first to perform photosynthesis and oxygenate the atmosphere -
Dominated the world -
Guide fossils: Trilobites
Geological events: Mountain formation, variable climates, Permian-Triassic biological crisis
Climate events: Great ice ages, formation of Pangaea -
They became the dominant vertebrates in aquatic ecosystems -
They became the dominant terrestrial vertebrates -
It happened in the Paleozoic era, 85% of marine species disappeared -
Its colonization and massive expansion changed the composition of Earth's atmosphere and global climate -
It happened in the paleozoic era, 75% of marine species disappeared, especially reefs and many primitive fish. -
The first reptiles evolved from amphibian ancestors -
Extinction of the trilobites and extinction of 90% of living beings -
Guide fossils: Ammonites
Geological events: Breakup of Pangaea, greenhouse effect, extinction of the dinosaurs by meteorite
Climate events: Climate regulation -
They evolved directly from a group of theropod dinosaurs -
Around 70–80% of species became extinct -
They were diversifying and expanding very rapidly -
They diversified greatly at the end of the Mesozoic era -
It was caused primarily by the impact of a large asteroid, causing the disappearance of 75% of the planet's species -
Guide fossils: Nummilites
Geological events: Separation of the continents, formation of the current mountain ranges (Alps, Himalayas)
Climate events: Gradual cooling of the planet -
were the first humans -
It gradually consolidated itself through its capacity for adaptation, development, and global migration