Globally distributed iridium layer preserved within the Chicxulub impact structure

Globally distributed iridium layer preserved within the Chicxulub impact structure

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/

The 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. 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.