Neoproterozoic

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Aeonothem Arathem system Age
( mya )
later later later
P
r
o
t
e
r
o
z
o
i
k
u
m

Duration:

1959
Ma 		Neoproterozoic
Jungproterozoikum
Duration: 459 Ma 		Ediacarium 541
⬍
635
Cryogenium 635
⬍
720
Tonium 720
⬍
1000
Mesoproterozoic
Mittelproterozoikum
Duration: 600 Ma 		Stenium 1000
⬍
1200
Ectasium 1200
⬍
1400
Calymmium 1400
⬍
1600
Paleoproterozoic
Altproterozoikum
Duration: 900 Ma 		Statherium 1600
⬍
1800
Orosirium 1800
⬍
2050
Rhyacium 2050
⬍
2300
Siderium 2300
⬍
2500
earlier earlier earlier

The Neoproterozoic ( = Young Proterozoic ) is the youngest section of the Proterozoic . At the end of this era , the Precambrian (“primeval earth times”) also ended. The Neoproterozoic begins about 1000 million years ago and ends about 541 million years ago.

biology

During this time multicellular life arose on earth. Microorganisms first appeared on earth around 3,800 million years ago. See also geological timescale .

After the Mesoproterozoic already unicellular organisms with cell nucleus ( eukaryotes were present), multicellular emerged during the Neoproterozoic plants and invertebrate animals in many different tribes and formed the basis for the transition to the Phanerozoic , starting with the Cambrian , the first period of the Palaeozoic ( Paleozoic ) . During the Neoproterozoic, the continents near the equator at that time were repeatedly iced, which are interpreted as ice ages with presumably global icing (" snowball earth ").

Subdivision of the Neoproterozoic

Detailed view of the quartzite bank above the Lewisian Gneiss at the outcrop of the Assyntic Discordance (Northern Scotland) - example of a Neoproterozoic sedimentary rock

The subdivision of the Neoproterozoic and adjacent periods:

See also

Individual evidence

  1. ↑ a b c J G Ogg, Gabi Ogg and FM Gradstein: A Concise Geologic Timescale . Elsevier, 2016, ISBN 978-0-444-59468-6 , pp. 23-26, 29-36 .