Early Palaeozoic Icehouse

The Early Palaeozoic Icehouse was a cool period that interrupted the greenhouse temperatures of the Ordovician and Silurian periods, This happened in 360MA and led to culminating in the Hirnantian glaciation and the Ordovician extinction event.[1] The icehouse was formerly thought only to consist of the Hirnantian glaciation itself, but has now been recognized as a longer, more gradual event.[2]

Over an interval of 30 million years, seven glacial maxima were recorded in the sedimentary record:[3]

  1. Guttenberg Regression
  2. Early Rakvere Regression
  3. Early Ashgill Regression
  4. Hirnantian Glaciation
  5. Early Ashgill Regression
  6. Early Aeronian Glaciation
  7. Late Telychian Glaciation

See also

References
  1. Page, A.; Zalasiewicz, J.; Williams, M.; Popov, L. (2007). "Were transgressive black shales a negative feedback modulating glacioeustasy in the Early Palaeozoic Icehouse?". In Williams, Mark; Haywood, A. M.; Gregory, J.; et al. (eds.). Deep-time perspectives on climate change: marrying the signal from computer models and biological proxies. Special Publication of the Geological Society of London. The Micropaleontology Society special publications. ISBN 978-1-86239-240-3.
  2. Munnecke, A.; Calner, M.; Harper, D. A. T.; Servais, T. (2010). "Ordovician and Silurian sea-water chemistry, sea level, and climate: A synopsis". Palaeogeography, Palaeoclimatology, Palaeoecology. 296 (3–4): 389–413. doi:10.1016/j.palaeo.2010.08.001.
  3. Page, A. A., Zalasiewicz, J. A., Williams, M., & Popov, L. E. (2007). Were transgressive black shales a negative feedback modulating glacioeustasy in the Early Palaeozoic Icehouse(Vol. 2, pp. 123-156). pp. 123œ156. Special Publication of the Geological Society of London, The Micropalaeontological Society.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.