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The Cambrian period was the first Big Boom of Life. Marine Organisms started nourishing. ALL life was in the ocean. The Earth was covered by the ocean,
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Fish evolved in oceans, life was not diverse on land. Mollusks, Invertebrates, and anthropods dominated oceans.
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60% of marine species were wiped out. Life began to appear on land in small forms.
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Plants formed all over the land. By the end of this period the first see bearing plant appeared.
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Terrestrial life flourished during this time, Dominant land vertibrates would eventually evolve into reptiles, Coal beds were formed all around the world.
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Diversity amongst the amniots in the mammals, turtles, lepidosaurs, an archosaurs. PANGEA. Lots of desert.
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First true mammals, Therapsis evolved during this period. Global climate was very hot and dry. Ended with a mass extinction of all dinosaurs.
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Known as the age of reptiles in some eyes. Continental climate went from dry to humid, many deserts were replaced by lush rainforests. 2 different extinction events occured during this time.
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Populated with now extinct marine reptiles. Dinosaurs dominated on land. This period ended with a mass extinction of large marine reptiles.
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Began with the extinction of dinosaurs. South America was connected to North America towards end of this period. Resulted in climate changes,
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Ice Age! Growth and decay of continental ice sheets. Humans began existing. Glaciers turned Black Sea and Baltic Sea into fresh water.
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