[Rockhounds] Chicxulub impact acidified the ocean instantly

[Paul]

The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash
The Chicxulub event was as damaging to life in the oceans
as it was to creatures on land, a study shows. New York Times
https://www.nytimes.com/2019/10/21/science/chicxulub-asteroid-ocean-acid.html

Tiny shell fossils reveal how ocean acidification can cause
mass extinction By Julie Zaugg, CNN, October 22, 2019
https://www.cnn.com/2019/10/22/europe/ocean-acidification-asteroid-intl-hnk-scn/index.html

New study underpins the idea of a sudden impact killing
off dinosaurs and much of the other life, GFZ
GeoForschungsZentrum Potsdam, Helmholtz Centre
October 22, 2019
https://www.sciencedaily.com/releases/2019/10/191022080721.htm

The open access paper is:

Michael J. Henehan, Andy Ridgwell, Ellen Thomas, Shuang
Zhang, Laia Alegret, Daniela N. Schmidt, James W. B. Rae,
James D. Witts, Neil H. Landman, Sarah E. Greene, Brian T.
Huber, James R. Super, Noah J. Planavsky, Pincelli M. Hull,
2019, Rapid ocean acidification and protracted Earth
system recovery followed the end-Cretaceous Chicxulub
 ??impact. Proceedings of the National Academy of Sciences
Oct 2019, 201905989; DOI: 10.1073/pnas.1905989116
https://www.pnas.org/content/early/2019/10/15/1905989116

Yours,

Paul H.