Cretaceous-Paleogene - Impact Deposit

Alternate Names Chicxulub
Coordinates 21° 18' 0" N; 89° 32' 24" W
Notes
  1. Note the Lat and Long provided is of the crater center
Country Mexico

Related Countries :
  1. Mexico
Region Yucatán Peninsula
Date Confirmed 1978
Notes
  1. (Gault & Wedekind 1978); (Morgan et al. 1997) & (Gulick et al. 2013)
Age (Ma) 65.07
Notes :
  1. (Swisher III et al. 1992)

Method :
  1. 40Ar/39Ar dating
Impactor Type likely a carbonaceous chrondritic meteorite
Notes
  1. (Kyte, 1998); (Trinquier et al., 2006); (Gulick et al. 2013); 9-14 km impactor diameter and 20.4-21.5 km/s impact velocity (Johnson and Melosh, 2012)

Advanced Data Fields

Notes

Local Language
N/A
Spherules
Yes
Tektites
Unknown
Indivudual Glass Clasts
Unknown
Source Crater
Chicxulub Impact Crater
Geology
Proximal K-Pg event deposits in the Gulf of Mexico-Caribbean Sea are meters to tens of meters thick, with spherule-rich event beds
  1. (Gulick et al. 2013)
Other Shock Metamorphism
Unknown
Shatter Cones
No
Planar Fractures
No
Planar Deformation Features
No
Diaplectic Glass
No
Coesite
No
Stisovite
No

References

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D E Gault, J A Wedekind (1978) Experimental studies of oblique impact., Lunar and Planetary Science Conference Proceedings 3, p. 3843-3875, url

Carl C Swisher III, J M Grajales-Nishimura, A Montanari, S V Margolis, P Claeys, W Alvarez, P R Renne, E Cedillo-Pardo, F J M R Maurrasse, G H Curtis, Jan Smit, Michael O McWilliams (1992) Coeval (super 40) Ar/ (super 39) Ar ages of 65.0 million years ago from Chicxulub Crater melt rock and Cretaceous-Tertiary boundary tektites, Science 257(5072), p. 954-958, American Association for the Advancement of Science, Washington, DC, url

J Morgan, M Warner, J Brittan, Richard T Buffler, A Camargo-Zanoguera, G L Christeson, P Denton, A Hildebrand, R Hobbs, H Macintyre, G Mackenzie, P Maguire, L E Marin, Y Nakamura, M Pilkington, V L Sharpton, D Snyder, G Suarez, A Trejo (1997) Size and morphology of the Chicxulub impact crater, Nature (London) 390(6659), p. 472-476, Macmillan Journals, London, url, doi:http://dx.doi.org/10.1038/37291

F T Kyte (1998) A meteorite from the Cretaceous/Tertiary boundary, Nature (London) 396(6708), p. 237-239, Macmillan Journals, London, url, doi:http://dx.doi.org/10.1038/24322

Anne Trinquier, Jean-Louis Birck, Claude Jean Allègre (2006) The nature of the KT impactor. A 54Cr reappraisal, Earth and Planetary Science Letters 241(3), p. 780-788, url, doi:https://doi.org/10.1016/j.epsl.2005.11.006

B C Johnson, H J Melosh (2012) Impact spherules as a record of an ancient heavy bombardment of Earth, Nature 485(7396), p. 75-77, url, doi:10.1038/nature10982

B C Johnson, H J Melsoh (2012) New estimates for the number of large impacts throughout Earth's history, Early Solar System Impact Bombardment II, url

S P S Gulick, G L Christeson, Penny J Barton, R A F Grieve, J V Morgan, J Urrutia-Fucugauchi (2013) Geophysical Characterization of the Chicxulub Impact Crater, Reviews of Geophysics 51(1), p. 31-52, doi:10.1002/rog.20007