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Guide fossils: Estromatolitos
Geological events:
- Formation of the lithosphere, hydrosphere and atmosphere
- Formation of the supercontinent Rodina
- Formation of Pannotia
- Formation of the oceans
Climate events:
- A great global ice age beings
- Earth "snowball"
- Change from a reducing atmosphere to one rich in oxygen -
The first forms of life were unicellular, that is, made up of a single cell -
Life derived from a chemical evolution appeared -
Guide fossils: Trilobites
Geological events:
- Pannotia fracturing
- Formation of Pangea
- Great volcanic activity
Climate events:
- Ordovic glaciation
Carboniferous glaciation -
Terrestrial plants, invertebrates, fish and amphibians appeared -
First the jawless fish emerged and then the cartilaginous and bony ones emerged -
The first terrestrial plants were gymnosperms, that is, vascular plants that produce seeds. -
They arose from a group of bony fish that possessed a primitive lung -
Many of the current groups emerge, such as lizards, snakes and crocodiles, but dinosaurs stand out as the majority group -
Guide fossils: Ammonites
Geological events:
- Pangea fracturing
- Large meteor impact
Climate events:
- Started with a dry and warm trend during the Triassic -
The first mammals arose from the cynodonts, a group of reptiles -
Are the seed plants whose flowers have whorls -
Birds evolved from a group of carnivorous dinosaurs. An example is Archeopteryx -
Guide fossils: Numulites
Geological events:
- The present continents are formed
Climate events:
- Ice age
- The last great ice age ocurred -
Hominids are characterized by upright posture and bipedal locomotion -
They possess the main characteristics that define modern humans