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-Guide fossil: stromatolites (cyanobacteria)
-Geological event: The lithosphere, hydrosphere and atmosphere are formed and the earth had an early origin and evolution
-Climate event: The level of salt in the seas increased notably, atmospheres evolved from the primitive atmosphere to the oxygen-rich atmosphere
-Marine environment -
Unicellular life
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multicellular life
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-Guide fossil:Trilobites (arthropods).
-Geological event: Big explosion of life.
-Climate event: Greenhouse effect, great volcanic activity and formation of the super continent Pangeas.
-Marine and land environment -
The most intense burst of evolution ever known and the explosion saw an incredible diversity of live emerge.
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The first fish did not have jaw and over the years they evolved with a jaw, fins, etc.
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These first plants did not have flowers but did have seeds, that is, they reproduced through these
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These amphibians were dominant and had functional lungs and bony, lobed fins that supported the body.
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-Guide fossil: ammonites (cephalopod mollusk).
-Geological event: The Atlantic Ocean originates and the continents begin to separate.
-Climate event: There are no glaciations due to the warm climate
-Land and marine environment -
A small group of amphibians gave rise to reptiles, this supposed a great terrestrial colonization because the reptiles adapted to any habit either by their escapes on their skin, etc.
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Gymnosperm plants gave rise to angiosperm plants, that is with flowers and reproduce through pollen.
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-Guide fossil: nummundites (foraminifera)
-Geological event: completion of continental drift
-Climate event: decrease in temperatures and last glaciations (ice age)
-Land environment -
The first birds appeared from flying dinosaurs
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The first hominids were characterized by their upright posture and bipedal locomotion
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Homo sapiens are characterized mainly by bipedal position, cranial configuration, greater brain capacity, decreased jaw size, and less muscle mass.