Iridium in undersea crater confirms asteroid wiped out the dinosaurs
Hamish Johnston, Physics World, February 24, 2021,
https://physicsworld.com/a/iridium-in-undersea-crater-confirms-asteroid-wiped-out-the-dinosaurs/
Tha paper is:
Goderis, S., Sato, H., Ferriere, L, et al. 2021, Globally distributed
iridium layer preserved within the Chicxulub impact structure
Science Advances 24 Feb 2021: Vol. 7, no. 9, eabe3647
https://advances.sciencemag.org/content/7/9/eabe3647
There are arguments that seismic waves from the Chicxulub
impact did a superfrack job on the Deccan flood basalts and
magnified their eruptions. Go see;
Richards, M.A., Alvarez, W., Self, S., Karlstrom, L., Renne, P.R.,
Manga, M., Sprain, C.J., Smit, J., Vanderkluysen, L. and Gibson,
S.A., 2015. Triggering of the largest Deccan eruptions by the impact.
Geological Society of America Bulletin, 127(11-12), pp.1507-1520.
PDF at http://eprints.esc.cam.ac.uk/3289/1/Gibson%20bul%20gsa.pdf
PDF at http://pages.uoregon.edu/leif/resources/papers/GSAB_2015_Richards.pdf
Abstract at
https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/127/1112/1507/126064
Some commentary on flood basalts and mass extinctions:
Ernst, R.E. and Youbi, N., 2017. How Large Igneous Provinces
affect global climate, sometimes cause mass extinctions, and
represent natural markers in the geological record. Palaeogeography,
palaeoclimatology, palaeoecology, 478, pp.30-52.
PDF link, Ernst and Youbi (2017), at bottom of page at
http://www.largeigneousprovinces.org/downloads
PDF at
http://www.largeigneousprovinces.org/sites/default/files2/Ernst%20and%20Youbi%202017%20PPP.PDF
Abstract at
https://www.sciencedirect.com/science/article/pii/S0031018217302857
Yours,
Paul H.
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