Eras
Cryogenian
Proterozoic
Citation Formats
General Reference
APA Style
BibTeX
The second period of the Neoproterozoic era, spanning about 720 to 635 million years ago. It is defined by two severe global glaciations, the Sturtian and Marinoan, in which ice sheets may have reached or nearly reached the equator in a so called Snowball Earth or Slushball Earth state that severely disrupted the biosphere.
Facts
Start (Million Years Ago) End (Million Years Ago) Key EventSturtian Glaciation, about 717 to 660 Ma, the first major ice age; Marinoan Glaciation, about 639 to 632.3 Ma, the second, ending near the Cryogenian-Ediacaran boundary. 1 Cross-Tradition Connections
Anticipated By
In Discipline
Part Of
Precursor To
Sources
1. Cryogenian (Wikipedia)
Wikimedia FoundationLead sectionQuote, Lead section
The second of the three periods of the Neoproterozoic era, preceded by the Tonian and followed by the Ediacaran.
1. Cryogenian (Wikipedia)
Wikimedia FoundationGlaciations sectionQuote, Glaciations section
Sturtian Glaciation, about 717 to 660 Ma, the first major ice age; Marinoan Glaciation, about 639 to 632.3 Ma, the second, ending near the Cryogenian-Ediacaran boundary.
Reader Challenges (0 open reader challenges)
No disputes yet. Spotted an error or a better source? Open the first one.
Sign in to dispute this or suggest a correction.
View At A Past Year
The atlas records no dated fact of its own for this entry, so there is no other year to choose.