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Period: 4600 BCE to 540 BCE
PRECAMBRIAN
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 -
3800 BCE
1st life forms: 4:10
The first forms of life were unicellular, that is, made up of a single cell -
2100 BCE
1st most complex life forms: 9:07
Life derived from a chemical evolution appeared -
Period: 540 BCE to 245 BCE
PALEOZOIC
Guide fossils: Trilobites
Geological events:
- Pannotia fracturing
- Formation of Pangea
- Great volcanic activity
Climate events:
- Ordovic glaciation
Carboniferous glaciation -
505 BCE
Great explosion of life: 9:10
Terrestrial plants, invertebrates, fish and amphibians appeared -
455 BCE
Age of the fish: 21:37
First the jawless fish emerged and then the cartilaginous and bony ones emerged -
420 BCE
First terrestrial plants (gymnosperms): 21:48
The first terrestrial plants were gymnosperms, that is, vascular plants that produce seeds. -
340 BCE
Amphibian age: 22:13
They arose from a group of bony fish that possessed a primitive lung -
245 BCE
Age of the reptiles: 22:43
Many of the current groups emerge, such as lizards, snakes and crocodiles, but dinosaurs stand out as the majority group -
Period: 245 BCE to 66 BCE
MESOZOIC
Guide fossils: Ammonites
Geological events:
- Pangea fracturing
- Large meteor impact
Climate events:
- Started with a dry and warm trend during the Triassic -
240 BCE
1st dinosaurs and mammals: 22:44
The first mammals arose from the cynodonts, a group of reptiles -
200 BCE
1st angiosperms: 23:22
Are the seed plants whose flowers have whorls -
160 BCE
Age of the birds: 23:39
Birds evolved from a group of carnivorous dinosaurs. An example is Archeopteryx -
Period: 66 BCE to 1 BCE
CENOZOIC
Guide fossils: Numulites
Geological events:
- The present continents are formed
Climate events:
- Ice age
- The last great ice age ocurred -
20 BCE
1st hominids: 23:53
Hominids are characterized by upright posture and bipedal locomotion -
2 BCE
1st Homo sapiens: 23:59
They possess the main characteristics that define modern humans