Paleoproterozoic
Also known as Early Proterozoic, Paleoproterozoic Era, Palaeoproterozoic Era, Palaeoproterozoic
The Paleoproterozoic Era (also spelled Palaeoproterozoic) is the first of the three sub-divisions (eras) of the Proterozoic eon, and also the longest era of the Earth's geological history, spanning from (2.5–1.6 Ga). It is further subdivided into four geologic periods, namely the Siderian, Rhyacian, Orosirian and Statherian.
Key facts
- Geologic timespan.name
- Paleoproterozoic
- Geologic timespan.color
- Paleoproterozoic
- Geologic timespan.top_bar
- all time
- Geologic timespan.image_map
- Paleoproterozoic stromatolites Franceville.jpg
- Geologic timespan.caption_map
- Paleoproterozoic stromatolites
- Geologic timespan.timeline
- Paleoproterozoic
- Geologic timespan.proposed_boundaries1
- 2420–1780 Ma
- Geologic timespan.proposed_boundaries1_ref
- Gradstein et al., 2012
- Geologic timespan.proposed_subdivision1
- Oxygenian Period, 2420–2250 Ma
- Geologic timespan.proposed_subdivision1_coined
- Gradstein et al., 2012
- Geologic timespan.proposed_subdivision2
- Jatulian/Eukaryian Period, 2250–2060 Ma
~5 min read
Article
6 sectionsContents
- Atmosphere
- Life
- Geological events
- See also
- References
- External links
The Paleoproterozoic Era (also spelled Palaeoproterozoic) is the first of the three sub-divisions (eras) of the Proterozoic eon, and also the longest era of the Earth's geological history, spanning from (2.5–1.6 Ga). It is further subdivided into four geologic periods, namely the Siderian, Rhyacian, Orosirian and Statherian.
Paleontological evidence suggests that the Earth's rotational rate ~1.8 billion years ago equated to 20-hour days, implying a total of ~450 days per year. It was during this era that the continents first stabilized.