This Ancient Meteorite from the Birth of Our Solar System

This Ancient Meteorite from the Birth of Our Solar System

This Ancient Meteorite Is A Time Capsule From The Birth of Our Solar System
by Michelle Starr, ScienceAlert, August 30, 2023
https://www.sciencealert.com/this-ancient-meteorite-is-a-time-capsule-from-the-birth-of-our-solar-system

The open access paper is:

Krestianinov, E., Amelin, Y., Yin, QZ. et al. Igneous meteorites suggest Aluminium-26 heterogeneity in the early Solar Nebula. Nat Commun 14, 4940 (2023).

https://doi.org/10.1038/s41467-023-40026-1

https://www.nature.com/articles/s41467-023-40026-1#citeas

Yours,

Paul H.

Pre–Younger Dryas megafaunal extirpation in southern California

Pre–Younger Dryas megafaunal extirpation in southern California

How Early Humans May Have Transformed L.A.’s Landscape Forever
Science Friday, NPR, August 25, 2023
https://www.sciencefriday.com/segments/la-brea-saber-tooth-cat-fires/


The paper is:

O’Keefe, F.R., Dunn, R.E., Weitzel, E.M.,Waters, M.R., Martinez, L.N., Binder, W.J., Southon, J.R., Cohen, J.E., Meachen, J.A.,
DeSantis, L.R. and Kirby, M.E., 2023.
Pre–Younger Dryas megafaunal extirpation at Rancho La Brea linked to fire-driven state
shift. Science, 381(6659), p.eabo3594.
https://www.researchgate.net/profile/Michael-Waters-5/publication/373173502_Pre-Younger_Dryas_megafaunal_extirpation_at_Rancho_La_Brea_linked_to_fire-driven_state_shift/links/64de6911177c590413009230/Pre-Younger-Dryas-megafaunal-extirpation-at-Rancho-La-Brea-linked-to-fire-driven-state-shift.pdf

https://www.science.org/doi/abs/10.1126/science.abo3594

Yours,

Paul H.

Mysterious patches of glassy rock across Atacama Desert- Pica Glass and Atacamaites, Chile

Mysterious patches of glassy rock across Atacama Desert- Pica Glass and Atacamaites, Chile

In Mysterious patches of glassy rock across Atacama Desert,
https://www.mail-archive.com/meteorite-list@meteoritecentral.com/msg131785.html

Robert Verish asked:
>This story caused a big splash on the Internet back in late-2021, but I'm still looking for a published paper.
>Has anyone heard anything more about this speculated comet impact?

Here is a follow-up article (dated Nov. 8, 2021) regarding a reported finding of impact-melt glass from a suspect "comet impact in the Atacama Desert".
https://www.sci.news/space/atacama-desert-comet-10247.html

Here is the original CNN article:

https://www.cnn.com/2021/11/03/world/atacama-desert-glass-comet-scn/index.html

Below are some papers:

Gattacceca, J., Devouard, B., Barrat, J.A., Rochette, P., Balestrieri, M.L., Bigazzi, G., Ménard, G., Moustard, F., Dos Santos, E.,
Scorzelli, R. and Valenzuela, M., 2021. A 650 km2 Miocene strewnfield of splash-form impact glasses in the Atacama Desert,
Chile. Earth and Planetary Science Letters, 569, p.117049

Koeberl, C., Crósta, A.P. and Schulz, T., 2022, March. Geochemistry, Highly Siderophile Elements, and Re-Os Isotope Signatures of
Impact Glasses from the Atacama Desert, Chile. In 53rd Lunar and Planetary Science Conference (Vol. 2678, p. 2616).
https://www.hou.usra.edu/meetings/lpsc2022/pdf/2616.pdf

Roperch, P., Gattacceca, J., Valenzuela, M., Devouard, B., Lorand, J.P., Arriagada, C., Rochette, P., Latorre, C. and Beck, P., 2017.
Surface vitrification caused by natural fires in Late Pleistocene wetlands of the Atacama Desert. Earth and Planetary Science
Letters, 469, pp.15-26.
https://hal.science/hal-02889687/file/Pica_Glass_Paleomag_data.pdf


Schultz, P.H., Harris, R.S., Perroud, S., Blanco, N. and Tomlinson, A.J., 2022. Widespread glasses generated by cometary fireballs
during the late Pleistocene in the Atacama Desert, Chile. Geology, 50(2), pp.205-209. open access
https://pubs.geoscienceworld.org/gsa/geology/article/50/2/205/609354/Widespread-glasses-generated-by-cometary-fireballs


Yours,

Paul H.

Possible asteroid crater 520km in diameter buried deep in southeast Australia 19AUG2023

Possible asteroid crater 520km in diameter buried deep in southeast Australia

Asteroid crater 520km in diameter buried deep in southeast Australia, scientists say
Dy Andrew Glikson, Australian Geographic.com,UNSW Sydney • August 16, 2023
https://www.australiangeographic.com.au/topics/science-environment/2023/08/asteroid-crater-520km-in-diameter-buried-deep-in-southeast-australia-scientists-say/


World’s largest asteroid impact may be buried in Australia
Magnetic patterns beneath New South Wales' Murray Basin correspond to a colossal impact structure.
Sade Agard, Interesting Engineering, August 14, 2023
https://interestingengineering.com/science/worlds-largest-asteroid-impact-australia


The paywalled paper is:

Glikson, A.Y. and Yeates, A.N., 2022. Geophysics and origin of the Deniliquin multiple-ring feature, Southeast Australia. 

Tectonophysics, 837, p.229454.
https://www.sciencedirect.com/science/article/abs/pii/S0040195122002487


Yours,

Paul H.

New Paper Rebukes Claim That an Exploding Comet Destroyed Hopewell Culture 19AUG2023

New Paper Rebukes Claim That an Exploding Comet Destroyed Hopewell Culture

New Paper Rebukes Claim That an Exploding Comet Destroyed Hopewell Culture
Jason Colavito Blog, August 9, 2023
https://www.jasoncolavito.com/blog/new-paper-rebukes-claim-that-an-exploding-comet-destroyed-hopewell-culture


Comet Catastrophe Debunked: Archaeologists Refute Claims That a Comet
Destroyed Hopewell Culture, Science Tech News, August 17, 2923\
https://scitechdaily.com/comet-catastrophe-debunked-archaeologists-refute-claims-that-a-comet-destroyed-hopewell-culture/


Archaeology: Did a comet end the Hopewell civilization? Evidence slim
Brad Lepper,The Columbus Dispatch. June 2, 2022
https://www.dispatch.com/story/opinion/2022/06/02/hopewell-culture-claims-exploding-comet-ohio-destroyedcivilization/9999016002/


The open access paper is:

Nolan, K.C., Weiland, A., Lepper, B.T., Aultman, J., Murphy, L.R., Ruby, B.J., Schwarz, K., Davidson, M., Wymer, D., Everhart, T.D.
and Krus, A.M., 2023. Refuting the sensational claim of a Hopewell-ending cosmic airburst. Scientific Reports, 13(1), p.12910.
https://www.nature.com/articles/s41598-023-39866-0


Yours,

Paul H.

Earth's most ancient impact craters are disappearing

Earth's most ancient impact craters are disappearing

Earth's most ancient impact craters are disappearing
by Rebecca Dzombak, PhysOrg, August 1, 2023
https://phys.org/news/2023-08-earth-ancient-impact-craters.html

Earth Oldest Impact Craters Are Disappearing
By Micheal Starr, ScienceAlert, August 2, 2023
https://www.sciencealert.com/earth-oldest-impact-craters-are-disappearing

The open access paper is:

M. S. Huber et al, Can Archean Impact Structures Be Discovered?
A Case Study From Earth's Largest, Most Deeply Eroded Impact
Structure, Journal of Geophysical Research: Planets (2023).
DOI: 10.1029/2022JE007721
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JE007721

Yours,

Paul H.