What was the first era of the earth was the era

Historical epoch million years major events.

Plutozoic Cryptozoic Era 4570 Earth appeared.

The proterozoic 4150 first living --- bacteria appeared on Earth.

Dionysian generation 3950 archaea appeared.

Early rain sea generation 3850 on Earth appeared oceans and other waters.

Archean Archean 3800

Paleoarchan 3600 blue-green algae appeared.

Middle Archean 3200

Neo-Archean 2800 First Ice Age.

Proterozoic Age 2500

Stratum 2300

Orogenic 2050

Paleoproterozoic Consolidation 1800

Caprock 1600

Extension 1400

Mesoproterozoic Narrow Belt 1200

Stretch 1000 Rodinha paleocontinent formation.

Ice Age 850 Snowball event occurred.

Neoproterozoic Ediacaran 630 +5 -30 multicellular organisms appeared.

Phanerozoic Paleozoic Cambrian Cambrian explosion of life.

Ordovician fish occurrence; Marine algae flourish.

Silurian terrestrial naked fern occurs.

Devonian Fish boom Amphibians appear Insects appear Seed plants appear Lycopodium and horsetail appear.

Carboniferous Insect boom Reptile appearance Coal forest Gymnosperm emergence Reptile appearance.

Mesozoic Permian Permian extinction event, 95% of life on Earth was extinct Pangea was formed.

Triassic dinosaurs appeared Oviparous mammals appeared.

Jurassic Marsupial mammals appear Birds appear Gymnosperms flourish Angiosperms appear.

Cretaceous The Boom and Extinction of Dinosaurs The Cretaceous-Tertiary extinction event, the extinction of 45% of life on Earth The emergence of mammals with placentas.

New generation to the present.

Is it geological time?

The first geological age is the Archean.

In fact, much earlier, the earth's civilization is a cycle of ......It doesn't work out at all.

The earliest age of the earth was the Aurora period. The earth was formed 100 million years ago, and life on the earth began to appear 3.8 billion years ago, during which it went through five generations and twelve epochs, Archean, Proterozoic, Paleozoic, Mesozoic, and Cenozoic, and we now belong to the Quaternary of the Cenozoic Era.

In the international geological epoch, it is divided into different levels: universe, generation, era, epoch, period, and time; It is similar to the biological "boundary, phylum, steel, order, family, genus, and species", of which the earliest generation is Archean, and the earliest era is the Proterozoic Sinian. During the Sinian period (100 million years ago), some simple arthropods and coelenterates appeared.

The name of the Aurora is related to ancient China, because the ancient Indians called China cinisthana, which was translated as Aurora in Buddhist scriptures, hence the name Aurora.

Historical epoch million years major events.

Plutozoic Cryptozoic Era 4570 Earth appeared.

The proterozoic 4150 first living --- bacteria appeared on Earth.

Dionysian generation 3950 archaea appeared.

Early rain sea generation 3850 on Earth appeared oceans and other waters.

Archean Archean 3800

Paleoarchan 3600 blue-green algae appeared.

Middle Archean 3200

Neo-Archean 2800 First Ice Age.

Proterozoic Age 2500

Stratum 2300

Orogenic 2050

Paleoproterozoic Consolidation 1800

Caprock 1600

Extension 1400

Mesoproterozoic Narrow Belt 1200

Stretch 1000 Rodinha paleocontinent formation.

Ice Age 850 Snowball event occurred.

Neoproterozoic Ediacaran 630 +5 -30 multicellular organisms appeared.

Phanerozoic Paleozoic Cambrian Cambrian explosion of life.

Ordovician fish occurrence; Marine algae flourish.

Silurian terrestrial naked fern occurs.

Devonian Fish boom Amphibians appear Insects appear Seed plants appear Lycopodium and horsetail appear.

Carboniferous Insect boom Reptile appearance Coal forest Gymnosperm emergence Reptile appearance.

Mesozoic Permian Permian extinction event, 95% of life on Earth was extinct Pangea was formed.

Triassic dinosaurs appeared Oviparous mammals appeared.

Jurassic Marsupial mammals appear Birds appear Gymnosperms flourish Angiosperms appear.

Cretaceous The Boom and Extinction of Dinosaurs The Cretaceous-Tertiary extinction event, the extinction of 45% of life on Earth The emergence of mammals with placentas.

New generation to the present.

This era is the oldest period in the history of geological development, lasting 1.5 billion years, and is the earliest stage in the history of the Earth's evolution with a clear geological record. Due to its age, the geological records preserved in ancient times are very fragmented and scattered. But Archean was also a critical period in the evolution of the earth, and the formation of the earth's lithosphere, hydrosphere, atmosphere, and life all occurred during this important and long period.

Leave the rest. About 3.9 billion years ago, the first permanent crust of the Earth was formed, and the atmosphere and seawater began to form 3.5 billion years ago. In the early days of the Archean era, there was no life on Earth. Life elements, such as carbon, hydrogen, oxygen, nitrogen, etc., first form simple organic molecules under the strong cosmic rays and lightning bombardment, and then develop into complex organic molecules, and then form quasi-life condensations, and then evolve from condensates to primitive life.

2.9 billion years ago, a large number of blue-green algae appeared on the earth to form stromatolites, which indicates that free oxygen and prokaryotes engaged in photosynthesis appeared on the earth during this period. After the astronomical period, the Earth officially became a member of the solar system. After about 2.2 billion years, the development of the earth entered a geological period, that is, the Archean period.

Earth age division: Archean (4600-2500 million years), divided into Archean (4600-3600) Paleo-Archean (3600-3200) Middle Archean (3200-2800) Neo-Archean (2800-2500) Proterozoic (2500-540) divided into Paleoproterozoic (2500-1800) Mesoproterozoic (1800-1000) Neoproterozoic (1000- 540) The end of the Neoproterozoic period was the Sinian (650-540), and the Sinian was only used domestically. The Phanerozoic (540-0) is divided into the Early Paleozoic (540-408) divided into the Cambrian (540-495) and the Cambrian is divided into three epochs:

Early Cambrian, Middle Cambrian, Late Cambrian Ordovician (495-438), Ordovician is divided into three epochs: Early Ordovician, Middle Ordovician, Late Ordovician Silurian (438-408), and the Silurian is divided into three epochs: Early Silurian, Middle Silurian and Late Silurian Epoch.

The Late Paleozoic (408-251) is divided into Devonian (408-355), the Devonian is divided into three epochs: Early Devonian, Middle Devonian, Late Devonian, Carboniferous (355-295), Carboniferous is divided into three epochs: Early Carboniferous, Middle Carboniferous, Late Carboniferous Permian (295-251), and Permian is divided into two epochs:

Early Permian, Late Permian, Mesozoic (251-65).

Divided into the Triassic (251-203), the Triassic is divided into three epochs: Early Triassic, Middle Triassic, and Late Triassic.

Jurassic (203-137), Jurassic is divided into three epochs: Early Jurassic, Middle Jurassic, Late Jurassic, Cretaceous (137-65), Cretaceous is divided into two epochs: Early Cretaceous, Late Cretaceous, Cenozoic (65-0) is divided into Paleogene (65-24) divided into Paleocene (65-58), Eocene (58-37), Oligocene (37-24), Neogene (24-divided into Miocene (24-5), Pliocene (5-Quaternary) (divided into Pleistocene (Holocene)