Siderian
Sign in to saveThe Siderian () is the first geologic period in the Paleoproterozoic Era and Proterozoic Eon. It lasted from to million years ago (Ma), spanning 200 million years, and is followed by the Rhyacian Period. Instead of being based on stratigraphy, these dates are defined chronometrically.
Key facts
- Geologic timespan.name
- Siderian
- Geologic timespan.color
- Siderian
- Geologic timespan.top_bar
- all time
- Geologic timespan.image_outcrop
- Banded iron formation Dales Gorge.jpg
- Geologic timespan.caption_outcrop
- A Siderian banded iron formation in Dales Gorge, Western Australia
- Geologic timespan.alt_outcrop
- A close-up view of a canyon wall. Red streaks stretch horizontally on the wall, and a few shrubs grow from the surrounding sandstone.
- Geologic timespan.image_art
- Snowball Huronian.jpg
- Geologic timespan.caption_art
- Artist's impression of the Earth during the Huronian glaciation, starting from the mid-Siderian
- Geologic timespan.alt_art
- A 3D rendered image of Earth covered with ice and snow.
- Geologic timespan.timeline
- Siderian
- Geologic timespan.proposed_boundaries1
- 2630 – 2420 Ma
- Geologic timespan.proposed_boundaries1_ref
- Kranendonk et al., 2012
- Geologic timespan.proposed_part1
- Neoarchean
- Geologic timespan.proposed_part1_ref
- Kranendonk et al., 2012
- Geologic timespan.proposed_boundaries2
- 3000? – 2450 Ma
- Geologic timespan.proposed_boundaries2_ref
- Shields et al., 2021
- Geologic timespan.proposed_part2
- Neoarchean
- Geologic timespan.proposed_part2_ref
- Shields al., 2021
via Wikipedia infobox
Article
21 sectionsContents
- Etymology and history
- Paleogeography
- Paleotectonics and lithology
- Magmatism
- Breakup of Kenorland
- Climate
- Great Oxidation Event
- Huronian glaciation
- Life
- Marine geochemistry
- Isotopic composition of iron
- Isotopic composition of sulfur
- Isotopic composition of nitrogen
- Composition of strontium and rubidium
- See also
- References
- Notes
- Citations
- Sources
- Further reading
- External links
The Siderian () is the first geologic period in the Paleoproterozoic Era and Proterozoic Eon. It lasted from to million years ago (Ma), spanning 200 million years, and is followed by the Rhyacian Period. Instead of being based on stratigraphy, these dates are defined chronometrically.
Most continential activity in this period was met with the breakup of the supercontinent Kenorland. While this event mainly occurred in the craton Laurentia, volcanic intrusions and dike swarms have appeared in plates pertaining to Northwestern Europe, South Africa, and Australia in connection to the rifting. In the ocean, emissions from hydrothermal vents contributed to the production and crystallization of minerals, along with varying concentrations of sulfur and iron. While this sedimentation circulated in the ocean, the amounts deposited on the ocean floor contributed to the development of banded iron formations, along with a diverse range of ores such as pyrite and magnetite.