Huronian glaciation

The paläoproterozoische icing is an ice age that began about 2.3 billion years ago during the transition between Archean and Proterozoic and lasted about 300 million years. It is also called archaic Ice Age Ice Age or Huron. Layer sequences found in the area of Lake Huron allow a reconstruction of former glacier movements. This so-called Gowganda Formation consists of finely laminated mudstones; there are Bändertone that were deposited in stagnant waters off the glaciers. Some of them contain dropstones. Layers of mudstone alternate with fossil Blocklehmen ( tillites ) and so reflect the periodic advance of the glacier into the water body resists.

The paläoproterozoische icing was most likely a global event. Evidence for this ice age are found for example in southern Canada, Wyoming, Finland, India and South Africa.

Possible cause of this icing is the large oxygen catastrophe or a long-running global phase low volcanic activity.

Swell

• The icing paläoproterozoische website of FU Berlin

• Evans, D. A.; Beukes, N. J.; Kirschvink, JL: Low- latitude glaciation in the Palaeoproterozoic era. In: Nature. 386, No. 6622, March 1997, pp. 262-6. Bibcode: 1997Natur.386 .. 262E. doi: 10.1038/386262a0.

• Robert E. Kopp, Joseph L. Kirschvink, Isaac A. Hilburn, Cody Z. Nash: The Paleoproterozoic snowball Earth: A climate disaster triggered by the evolution of oxygenic photosynthesis. In: Proc. Natl. Acad. Sci. U.S.A.. 102, No. 32, 2005, pp. 11131-6. Bibcode: 2005PNAS .. 10211131K. doi: 10.1073/pnas.0504878102. PMID 16061801 PMC: . 1183582 (Free full text ).

• Cold anomaly
• Period of time