PRESENTACIÓN UNIVERSO

the proterozoric

the largest eon ever (2500my-538my)

what the earth was like in the proterozoic era?

The proterozoic epoch is characterized by the fragmentation and formation of supercontinents such as rhodinia.

PROTEROZOIC

PALEOPROTEROZOIC

(2500 MY-1500 MY)

MESOPROTEROZOIC

(1500 MY- 1000 MY)

NEOPROTEROZOIC

(1000 MY- 542 MY)

PALEOPROTEROZOIC

Formation of supercontinents: During this era, supercontinents such as Columbia formed.First cianobacteries Great Oxidation: High level of oxigen at the atmosphere

first cyanobacterias and oxidation

Cyanobacteria, also known as blue-green algae, appeared about 3.5 billion years ago. They were the first organisms to perform oxygenic photosynthesis, producing oxygen and increasing oxygen levels in the atmosphere. This process led to the Great Oxidation about 2.4 billion years ago. Cyanobacteria formed stromatolites, sedimentary structures that are some of the oldest fossils. They have also evolved and diversified, adapting to diverse environments.

first cyanobacterias and oxidation

Cyanobacteria, also known as blue-green algae, appeared about 3.5 billion years ago. They were the first organisms to perform oxygenic photosynthesis, producing oxygen and increasing oxygen levels in the atmosphere. This process led to the Great Oxidation about 2.4 billion years ago. Cyanobacteria formed stromatolites, sedimentary structures that are some of the oldest fossils. They have also evolved and diversified, adapting to diverse environments.

mesoproterozoic

A crucial event in the history of life occurred: the appearance of eukaryotic cells. These cells are more complex than prokaryotic cells, since they contain a defined nucleus and organelles surrounded by membranes. The most accepted theory of their origin is endosymbiosis, where a large prokaryotic cell engulfed a smaller prokaryotic cell, which then became an organelle, such as mitochondria or chloroplasts. This advance allowed for greater diversity and complexity in organisms, laying the foundation for the evolution of multicellular life forms.

neoproterozoic

Glaciations: Major glaciations occurred, such as the Sturtian glaciation and the Marinoan glaciation, which covered much of the Earth in ice. Evolution of life: The first complex multicellular organisms emerged, including the first animals in the Ediacaran period.

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