Mahuika crater

Mahuika crater is a submarine feature that is hypothesized to be an impact crater. It is about 20 ± 2 km (12.4 ± 1.2 mi) wide and over 153 meters (502 ft) deep and lies on the New Zealand continental shelf at 48.3 South and 166.4 East,[1] to the south of The Snares. The Mahuika crater is named after the Māori god of fire. However, there is debate about its origins.

Initial discovery

The crater was reported and named by Dallas Abbott and her colleagues from the Lamont-Doherty Earth Observatory at Columbia University.[2] Based on elemental anomalies, fossils, and minerals, which are interpreted to be derived from the impact, found in an ice core from the Siple Dome in Antarctica, it is argued that the impact which created the Mahuika crater occurred around 1443 AD,[3] but other sources have placed the date as 13 February 1491 AD.[4]

Some evidence suggests that the tsunami it caused was observed by Aboriginal Australians and entered into their oral traditions.[5][6]

Debate on the origin

In 2010 a paper was published in Marine Geology which critically analysed Abbott's claims regarding the origin of the Mahuika crater. The researchers determined that there was no evidence to indicate a comet created the crater, and therefore the possibility of an impact causing the tsunami was highly unlikely.[4]

See also

References
  1. Myth and Geology, Volume 273 of Special publication - Geological Society of London, Luigi Piccardi, W. Bruce Masse, Geological Society of London, 2007, page 203, ISBN 1862392161, 9781862392168
  2. Abbott, D.H., A. Matzen, E.A. Bryant, and S.F. Pekar (2003) Did a bolide impact cause catastrophic tsunamis in Australia and New Zealand? Archived 2011-03-17 at the Wayback Machine Geological Society of America Abstracts with Programs. 35:168.
  3. Abbott, D.H., P. Biscaye, J. Cole-Dai, and D. Breger, 2005, Evidence from an Ice Core of a Large Impact Circa 1443 A.D. American Geophysical Union, Fall Meeting 2005, abstract #PP31C-05.
  4. Goff, James; et al. (2010). "Analysis of the Mahuika comet impact tsunami hypothesis". Marine Geology. 271 (3/4): 292–296. Bibcode:2010MGeol.271..292G. doi:10.1016/j.margeo.2010.02.020.
  5. Hamacher, Duane W. & Norris, Ray P. (2009). "Australian Aboriginal Geomythology: Eyewitness Accounts of Cosmic Impacts?" (PDF). Archaeoastronomy: The Journal of Astronomy in Culture. 22: 62–95, pages 68–69. arXiv:1009.4251. Bibcode:2009Arch...22...62H. Archived (PDF) from the original on 6 October 2014.
  6. Bryant, E.A.; Walsh, G.; Abbott, D.H. (2007). "Cosmogenic Mega-Tsunami in the Australia Region: Are They Supported by Aboriginal and Maori Legends?". In Piccardi, L.; Masse, W. Bruce (eds.). Myth and Geology. Geological Society Special Publication No. 273. London: Geological Society. pp. 203–214. ISBN 978-1-86239-216-8.

Further reading
  • Hostile Shores:Catastrophic Events in Prehistoric New Zealand and their Impact on Maori Coastal Communities, Bruce McFadgen, 2007, Auckland University Press. ISBN 978-1-86940-390-4

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