Including Original "Paul H. Letters" Copyright © 1996-2024 Paul V. Heinrich / website © 1996-2024 Dirk Ross - All rights reserved.



Friday 25 October 2019

End-Permian (252 Mya) deforestation, wildfires and flooding (open access paper) 25OCT2019

 End-Permian (252 Mya) deforestation, wildfires and flooding (open access paper)

Below is a very interesting open access paper.

Vajda, V., McLoughlin, S., Mays, C., Frank, T.D., Fielding, C.R.,
Tevyaw, A.,
Lehsten, V., Bocking, M. and Nicoll, R.S., 2020. End-Permian (252 Mya)
deforestation, wildfires and flooding???An ancient biotic crisis with lessons
for the present. Earth and Planetary Science Letters, 529, p.115875.

Yours,

Paul H.

Thursday 24 October 2019

Chicxulub impact acidified the ocean instantly

Chicxulub impact acidified the ocean instantly

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.

Younger Dryas platinum anomaly reported from South Carolina - Open Access paper

Younger Dryas platinum anomaly reported from South Carolina - Open Access paper

New evidence that an extraterrestrial collision 12,800 years ago triggered an abrupt climate
change for Earth, the Conversation, October 22, 2019
https://theconversation.com/new-evidence-that-an-extraterrestrial-collision-12-800-years-ago-triggered-an-abrupt-climate-change-for-earth-118244

the open access paper is:

Moore, C.R., M.J. Brooks, A.C. Goodyear, T.A. Ferguson, A.G. Perrotti, S. Mitra, A. Listecki,
B. King, D.J. Mallinson, C.S. Lane, B. Shapiro, J. Knapp, A. West, D.L. Carlson, W. Wolbach,
T.R. Them, S.M. Harris, and S. Pyne-O???Donnell.

2019. Sediment Cores from White Pond, South Carolina, contain a platinum anomaly,
pyrogenic carbon peak, and coprophilous spore decline at 12.8 ka. Scientific Reports
volume 9, Article number: 15121 (2019)
https://www.nature.com/articles/s41598-019-51552-8

Regardless of how the platinum anomaly is interpreted, White Pond, a Carolina Bay predates
it and the Younger Dryas. Thus, the above paper further supports the idea that the Carolina Bays are not connected to Younger Dryas event as concluded by:

Schaetzl, R.J., Sauck, W., Heinrich, P.V., Colgan, P.M. and Holliday, V.T., 2019. Commentary on Klokocnik, J., Kostelecky, and Bezdek, A. 2019. The putative Saginaw impact structure, Michigan, Lake Huron, in the light of gravity aspects derived from recent EIGEN 6C4 gravity field model. Journal of Great Lakes Research 45: 1220.

A related paper is:

Krause, T.R., Russell, J.M., Zhang, R., Williams, J.W. and Jackson, S.T., 2019. Late Quaternary vegetation, climate, and fire history of the Southeast Atlantic Coastal Plain based on a 30,000-yr multi-proxy record from White Pond, South Carolina, USA. Quaternary Research, 91(2), pp.861-880.
Vancouver

Yours

Paul H.

Wednesday 16 October 2019

Venus May Not Have Once Been As Earth-like As Scientists Thought

Venus May Not Have Once Been As Earth-like As Scientists Thought

Venus May Not Have Been As Earth-like As Scientists Thought
By Elizabeth Howell, SpaceCom, October 14, 2109
https://www.space.com/venus-not-so-earthlike-after-all.html

The papers are:

Wroblewski, F.W., Treiman, A.H., Bhiravarasu, S.S. and Gregg,
T.K.P., 2019, March. Ovda Fluctus, the Festoon Lava Flow on
Ovda Regio, Venus: Most Likely Basalt. In Lunar and Planetary
Science Conference (Vol. 50).
https://www.hou.usra.edu/meetings/lpsc2019/pdf/1699.pdf

Wroblewski, F.B., Treiman, A.H., Bhiravarasu, S. and Gregg, T.K.,
2019. Ovda Fluctus, the Festoon Lava Flow on Ovda Regio,
Venus: Not Silica???Rich. Journal of Geophysical Research: Planets,
124(8), pp.2233-2245.
https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JE006039

Yours,

Paul H.

Saturday 12 October 2019

The last mammoths were not killed by an extraterrestrial impact

The last mammoths were not killed by an extraterrestrial impact.

How the Last Woolly Mammoths Met Their Demise on a Remote Arctic Island
George Dvorsky, GIZMODO
https://gizmodo.com/how-the-last-woolly-mammoths-met-their-demise-on-a-remo-1838848130

the paper is:

Arppe, L., Karhu, J.A., Vartanyan, S., Drucker, D.G., Etu-Sihvola, H. and Bocherens, H., 2019. Thriving or surviving? The isotopic record of the Wrangel Island woolly mammoth population. Quaternary
Science Reviews, 222, no. 105884.
https://www.sciencedirect.com/science/article/pii/S0277379119301398\\

Yours,

Paul H.

Friday 4 October 2019

Evaluation of Paleocene-Eocene thermal maximum impact trigger hypothesis

Evaluation of Paleocene-Eocene thermal maximum impact trigger hypothesis

Galinkin, R.A., 2019. Evaluating the impact trigger hypothesis for the onset of the Paleocene-Eocene thermal maximum,
MS thesis, Rutgers University-School of Graduate Studies.
https://rucore.libraries.rutgers.edu/rutgers-lib/60679/

https://rucore.libraries.rutgers.edu/rutgers-lib/60679/PDF/1/play/

Yours,

Paul H.

Tuesday 1 October 2019

Meteorite found while looking for gold?

Meteorite found while looking for gold?

Man thinks he found gold; he actually found a rare meteorite By Emma Reed, September 24, 2019
https://www.science101.com/man-thinks-found-gold-rare-meteorite/

Yours,

Paul H.