Quadrantid meteor shower will peak 03/04 January, Friday night/Saturday morning 03JAN2020

 Quadrantid meteor shower will peak 03/04 January, Friday night/Saturday morning

Quadrantid meteor shower will peak tomorrow

night (03/04 January, Friday night/Saturday morning)!

Bad Astronomy, Phil Plait, January 2, 2020

https://www.syfy.com/syfywire/fireworks-for-the-new-year-the-quadrantid-meteor-shower-peaks-tomorrow

By the way, really weird stuff is also happening in Colorado skies.

Mysterious drones flying nighttime patterns over

northeast Colorado leave local law enforcement stumped

Phillips County sheriff says there are at least 17 of

the aircraft that fly between 7 and 10 p.m. nightly

By Shelly Bradbury, The Denver Post, December 23, 2019

https://www.denverpost.com/2019/12/23/drones-mystery-colorado/

‘It’s Creepy’: Unexplained Drones Are Swarming by

Night Over Colorado. Sheriffs in western Nebraska

and eastern Colorado say they don’t know who’s

flying the drones — or why. The F.A.A. is investigating.

Mitch Smith, New York Times, January 1, 2020

https://www.nytimes.com/2020/01/01/us/drones-FAA-colorado-nebraska.html

Mysterious swarms of giant drones have started to

appear in the Colorado and Nebraska night sky,

and nobody knows where they're coming from

Irene Jiang, Business Insider, December 30, 2019

https://www.businessinsider.com/giant-drone-swarm-mystery-in-colorado-nebraska-skies-2019-12

Yours,

Paul.

"The past is never dead. It's not even past."

William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)

Edscottite found in Wedderburn IAB iron meteorite 28DEC2019

 Edscottite found in Wedderburn IAB iron meteorite

Scientists Have Officially Found a Mineral Never Before Seen in Nature

Peter Dockrill, Science Alerts, December 25, 2019

https://www.sciencealert.com/scientists-have-discovered-a-mineral-never-before-seen-in-nature

the paper is:

Ma, C. and Rubin, A.E., 2019. Edscottite, Fe5C2, a new

iron carbide mineral from the Ni-rich Wedderburn

IAB iron meteorite. American Mineralogist, 104(9), pp.1351-1355.

https://www.degruyter.com/view/j/ammin.2019.104.issue-9/am-2019-7102/am-2019-7102.xml

https://pubs.geoscienceworld.org/msa/ammin/article-abstract/104/9/1351/573345

Yours,

Paul H.

Metallosphaera sedula eats meteorites (open access paper) 28DEC2019

 Metallosphaera sedula eats meteorites (open access paper) 

Scientists Just Identified an Organism That Thrives on Eating Meteorites Mike Mcrae,
Science Alert, December 5, 2019

https://www.sciencealert.com/researchers-find-a-microbe-that-not-only-eats-meteorites-it-can-t-get-enough-of-them

The paper is:

Milojevic, T., Kölbl, D., Ferrière, L., Albu, M., Kish,

A., Flemming, R.L., Koeberl, C., Blazevic, A., Zebec,

Z., Simon, K.M.R. and Schleper, C., 2019. Exploring

the microbial biotransformation of extraterrestrial

material on nanometer scale. Scientific Reports, 9(1), pp.1-11.

https://www.nature.com/articles/s41598-019-54482-7

https://search.proquest.com/openview/cd1cea9c8a5d045e998b5746b2efed70/1?pq-origsite=gscholar&cbl=2041939

Yours,

Paul H.

Scanned and Searchable Historic Texas Newspapers Now Online 24DEC2019

 Scanned and Searchable Historic Texas Newspapers Now Online

Hi,

For people, interested in searching for reports of

aerolites, meteorites, and so forth in Texas, a

considerable collection of historic local and regional

newspapers is online as scanned and searchable

digital files in "The Portal to Texas History" at

https://texashistory.unt.edu/search/?explore=true&fq=dc_type:text_newspaper

For example, there are 595 hits for "aerolite" and

1,760 hits for "meteorite."

Yours,

Paul H.

Siberian gas venting and the end-Permian extinction 19DEC2019

 Siberian gas venting and the end-Permian extinction

Svensen, H., Planke, S., Polozov, A.G., Schmidbauer, N.,

Corfu, F., Podladchikov, Y.Y. and Jamtveit, B., 2009.

Siberian gas venting and the end-Permian

environmental crisis. Earth and Planetary Science

Letters, 277(3-4), pp.490-500.

http://folk.uio.no/hensven/Svensen_EPSL_2009.pdf

https://henriksvensen.wordpress.com/publicationspapers/

https://henriksvensen.wordpress.com/page/2/

Some related papers are:

Burgess, S.D., Muirhead, J.D. and Bowring, S.A., 2017.

Initial pulse of Siberian Traps sills as the trigger of

the end-Permian mass extinction. Nature

Communications, 8(1), p.164.

https://www.researchgate.net/publication/318793382_Initial_pulse_of_Siberian_Traps_sills_as_the_trigger_of_the_end-Permian_mass_extinction

https://www.researchgate.net/profile/Muirhead_D

https://dspace.mit.edu/bitstream/handle/1721.1/113600/s41467-017-00083-9.pdf?sequence=1&isAllowed=y

Polozov, A.G., Svensen, H.H., Planke, S., Grishina,

S.N., Fristad, K.E. and Jerram, D.A., 2016. The basalt

 pipes of the Tunguska Basin (Siberia, Russia):

High temperature processes and volatile

degassing into the end-Permian atmosphere.

Palaeogeography, Palaeoclimatology,

Palaeoecology, 441, pp.51-64.

Svensen, H.H., Frolov, S., Akhmanov, G.G., Polozov,

A.G., Jerram, D.A., Shiganova, O.V., Melnikov, N.V.,

Iyer, K. and Planke, S., 2018. Sills and gas generation

in the Siberian Traps. Philosophical Transactions

of the Royal Society A: Mathematical, Physical and

Engineering Sciences, 376(2130), p.20170080.

https://www.researchgate.net/publication/327404155_Sills_and_gas_generation_in_the_Siberian_Traps

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6127383/

https://www.semanticscholar.org/paper/Sills-and-gas-generation-in-the-Siberian-Traps.-Svensen-Frolov/6d0e86fcd2beea7d96c4e15240e50650c2ac235a

Rampino, M.R., Rodriguez, S., Baransky, E. and

Cai, Y., 2017. Global nickel anomaly links

Siberian Traps eruptions and the latest Permian

mass extinction. Scientific reports, 7(1), p.12416.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5622041/

http://www.indiaenvironmentportal.org.in/files/file/Siberian%20trap%20eruptions.pdf

Yours,

Paul H.

British scientists try to find Antarctica's "missing meteorites" 30NOV2019

 British scientists try to find Antarctica's "missing meteorites"

Antarctica: Metal meteorite quest set to get under way

By Jonathan Amos, BBC Science, November 29,  2019

https://www.bbc.com/news/science-environment-50549855

The Mystery of Antarctica’s Missing Meteorites

Hiding deep under the ice, iron meteorites could hold

clues to the solar system’s past., The Atlantic

https://www.theatlantic.com/science/archive/2019/02/hunting-for-antarcticas-lost-meteorites/583564/

An off-topic, but still interesting article is:

Scientists Recreated Volcanic Lightning by Blasting Ash Out of a Cannon

Robin George Andrews, Gizmodo, November 29,  2019

https://gizmodo.com/scientists-recreated-volcanic-lightning-by-blasting-ash-1840068684

Yours,

Paul H.

Gobekli Tepe and the Younger Dryas Impact Hypothesis

Gobekli Tepe and the Younger Dryas Impact Hypothesis

There are an interesting series of blog posts about various ideas about Gobekli Tepe, its archaeology, and an alleged association with the Younger Dryas Impact Hypothesis on the Lateral Truth blog. They include:

Gobekli Tepe, Part 1: The Background
Rebbeca Bradley, Lateral Truth, October 22, 2018.
https://www.skepticink.com/lateraltruth/2018/10/22/gobekli-tepe-pt-1-background/

Gobekli Tepe, Part 2: The Archaeology
Rebbeca Bradley, Lateral Truth, November 5, 2018.
https://www.skepticink.com/lateraltruth/2018/11/05/gobekli-tepe-archaeology/

Gobekli Tepe, Part 3: The Alternative Mainstream
Rebbeca Bradley, Lateral Truth, November 16, 2018.
https://www.skepticink.com/lateraltruth/2018/11/16/gobekli-tepe-part-3-alternative-mainstream/

Gobekli Tepe, Part 4: Animals and Astronomy,
Rebbeca Bradley, Lateral Truth, November 18, 2018.
https://www.skepticink.com/lateraltruth/2018/11/18/gobekli-tepe-part-4-animals-astronomy/

Gobekli Tepe: Response To Martin Sweatman,
Rebbeca Bradley, Lateral Truth, December 6, 2018.
https://www.skepticink.com/lateraltruth/2018/12/06/gobekli-tepe-response-martin-sweatman/

Decoding Looney Tunes with Astronomy: What Does the Bunny Say?
Rebbeca Bradley, Lateral Truth, December 7, 2018
https://www.skepticink.com/lateraltruth/2018/12/07/decoding-looney-tunes-astronomy-bunny-say/

Martin Sweatman’s Decoding of Prehistory: Incoherent Catastrophe
Rebbeca Bradley, Lateral Truth, January 25, 2019
https://www.skepticink.com/lateraltruth/2019/01/25/martin-sweatmans-decoding-of-prehistory-incoherent-catastrophe/

The above blogs are about:
Sweatman, M.B. and Tsikritsis, D., 2017. Decoding Göbekli Tepe with archaeoastronomy: What does the fox say?. Mediterranean Archaeology & Archaeometry, 17(1)., 233-250.
http://omnilogi.com/ancient/deluge/Sweatman-and-Tsikritsis-gobekli-tepe-comet.pdf

In the same journal, Mediterranean Archaeology and Archaeometry, another paper about a fringe version of a Younger Dryas impact senario is published. The paper is:

Jaye, M., 2019. The flooding of the Mediterranean basin at the Younger–Dryas boundary. Mediterranean Archaeology and Archaeometry, 19(1), 71–83.
http://maajournal.com/Issues/2019/Vol19-1/7_Jaye%2019  (1).pdf

http://www.maajournal.com/Issues2019a.php

As previously mentioned, Rebbeca Bradley also commented on Michael Jaye’s unique ideas about an Younger Dryas impact causing a truly global flood in:

Michael Jaye’s Just-So Story by Rebbeca Bradley, June 22, 2019
https://www.skepticink.com/lateraltruth/2019/06/22/michael-jayes-just-so-story/

Carl Feagans also published a post on his blog about Micheal Jaye’s paper on the Global World-wide Flood and the Younger Dryas Impact. It is:

The Pseudoarchaeology of Michael Jaye’s Worldwide Flood 

Carl Feagans , Archaeology Review, November 18, 2019
https://ahotcupofjoe.net/2019/11/the-pseudoarchaeology-of-michael-jayes-worldwide-flood/

Yours,

Paul H.

"Ice fossils" found in Acfer 094 from the Hoggar Mountains in the Algerian Sahara.

"Ice fossils" found in Acfer 094 from the Hoggar Mountains in the Algerian Sahara.

‘Ice fossils’ from the desert. Algerian meteorite offers new insights into early asteroid formation.
Cosmos, Richard A. Lovett, Novmeber 22, 2019
https://cosmosmagazine.com/geoscience/ice-fossils-from-the-desert

Fossil ice found in meteorite is the first direct evidence of ice in asteroids
By Josh Davis, The Natural History Museum, London, November 21, 2019
https://www.nhm.ac.uk/discover/news/2019/november/fossil-ice-found-in-meteorite.html

https://www.nhm.ac.uk/press-office/press-releases/fossil-ice-found-in-meteor-is-the-first-direct-evidence-of-ice-i.html

The paper is:

Discovery of fossil asteroidal ice in primitive meteorite Acfer 094

By Megumi Matsumoto, Akira Tsuchiyama, Aiko Nakato, Junya Matsuno, Akira Miyake, Akimasa Kataoka, Motoo Ito, Naotaka Tomioka, Yu Kodama, Kentaro Uesugi, Akihisa Takeuchi, Tsukasa
Nakano, Epifanio Vaccaro, Science Advances, 20 Nov 2019 : eaax5078
https://advances.sciencemag.org/content/5/11/eaax5078

https://advances.sciencemag.org/content/5/11/eaax5078/tab-pdf

Yours,

Paul H.

Nannodiamond plant microfossils created by extraterrestrial impact (open access paper)

Nannodiamond plant microfossils created by extraterrestrial impact (open access paper)

Shumilova, T.G., Ulyashev, V.V., Kazakov, V.A., Isaenko, S.I., Svetov,S.A., Chazhengina, S.Y., Kovalchuk, N.S., Karite – diamond fossil: a new type of natural diamond,Geoscience Frontiers, https://doi.org/10.1016/j.gsf.2019.09.011.
https://www.sciencedirect.com/science/article/pii/S1674987119301768

Off topic, counter septarian structure, a great pseudoartifact.

We can't figure this one out By PRK, November 19, 2016
in Fossil ID, Fossil Forum
http://www.thefossilforum.com/index.php?/topic/70152-we-cant-figger-this-one-out-solved-counter-septarian-structures/

Counter septarian structure, Doctor Mud, Posted November 26, 2016
Page 4, Fossil Forum
http://www.thefossilforum.com/index.php?/topic/70152-we-cant-figger-this-one-out-solved-counter-septarian-structures/&page=4&tab=comments#comment

http://www.thefossilforum.com/index.php?/topic/70152-we-cant-figger-this-one-out-solved-counter-septarian-structures/&page=4&tab=comments#comment-737744

Seilacher, A., 2001. Concretion morphologies reflecting diagenetic and epigenetic pathways. Sedimentary Geology, 143(1-2), pp.41-57.

Yours,

Paul H.

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.

https://www.sciencedirect.com/science/article/pii/S0012821X19305679

Yours,

Paul H.

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.

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.

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.

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.

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.

Edscottite Found in Meteorite

Edscottite Found in Meteorite

Extraterrestrial Mineral Never Before Seen on Earth Found Inside a Famous Meteorite
By Yasemin Saplakoglu, Live Science
https://www.livescience.com/new-extraterrestrial-mineral-edscottite-meteorite.html

Scientists Confirm The Discovery of a Mineral Never Before Seen in Nature. Science Alert
https://www.sciencealert.com/mineral-never-seen-in-nature-found-buried-in-heart-of-mysterious-meteorite

This meteorite came from the core of another planet. Inside it, a new mineral By Liam Mannix, The Age
https://www.theage.com.au/national/victoria/this-meteorite-came-from-the-core-of-another-planet-inside-it-a-new-mineral-20190830-p52mhg.html

The paper is:

Ma, C. and Rubin, A.E., 2019. Edscottite, Fe5C2, a new iron carbide mineral from the Ni-rich
Wedderburn IAB iron meteorite. American Mineralogist, 104(9), pp.1351-1355.
https://www.degruyter.com/view/j/ammin.2019.104.issue-9/am-2019-7102/am-2019-7102.xml

https://pubs.geoscienceworld.org/msa/ammin/article/104/9/1351/573345/edscottite-fe5c2-a-new-iron-carbide-mineral-from

Yours,

Paul H.

Meteorite Hunting in China

Meteorite Hunting in China

China's meteorite hunters: Adventurers hoping to get rich from rocks Man travels world to search for fragments, Nanlin Fang, CNN Sep 07, 2019
https://www.koamnewsnow.com/lifestyle/chinas-meteorite-hunters-adventurers-hoping-to-get-rich-from-rocks/1118315685

China's meteorite hunters: The adventurers hoping to get rich from rocks Meet Zhang Bo, who travels to far-flung locations armed with a metal detector, hoping he'll stumble on a fallen meteorite. CNN, Sept. 7, 2019
https://www.cnn.com/style/article/china-meteorite-hunters-intl-hnk-scn/index.html

Yours,

Paul H.

Meteorite shows evidence of ancient volcanism on a long-gone protoplanet

Meteorite shows evidence of ancient volcanism on a long-gone protoplanet

A meteorite older than Earth shows evidence of ancient volcanism on a long-gone protoplanet, Phil Plait, SYFY WIRE
https://www.syfy.com/syfywire/a-meteorite-older-than-earth-shows-evidence-of-ancient-volcanism-on-a-long-gone-protoplanet

Oldest-ever igneous meteorite contains clues to planet building blocks. University of Arizona, August 2, 2018
https://asunow.asu.edu/20180802-oldest-ever-igneous-meteorite-contains-clues-planet-building-blocks

Taylor, G.J., 2018. The Oldest Volcanic Meteorite: A Silica-Rich Lava on a Geologically Complex Planetesimal. Planetary Science Research Discoveries Report, Hawai'i Institute of Geophysics and Planetology
http://www.psrd.hawaii.edu/Aug18/PSRD-oldest-volcanic-meteorite.pdf

Some papers are:

Hoffmann, V.H., Wimmer, K., Hochleitner, R. and Kaliwoda, M., 2018, March. Northwest Africa (NWA) 11119---Probing an Unknown Early Planetary Body?. In Lunar and Planetary Science Conference (Vol. 49).
https://www.hou.usra.edu/meetings/lpsc2018/pdf/2468.pdf

Srinivasan, P., Dunlap, D.R., Agee, C.B., Wadhwa, M., Coleff, D., Ziegler, K., Zeigler, R. and McCubbin, F.M., 2018. Silica-rich volcanism in the early solar system dated at 4.565 Ga. Nature communications, 9(1), p.30-36. Open Access
https://www.nature.com/articles/s41467-018-05501-0

Yours,

Paul H.

Libyan Desert Glass associated with shocked quartz (Open Access paper)

Libyan Desert Glass associated with shocked quartz (Open Access paper)

Koeberl, C. and Ferri??re, L., 2019. Libyan Desert Glass area in western Egypt: Shocked quartz in bedrock points to a possible deeply eroded impact structure in the region.
Meteoritics & Planetary Science. (Open Access paper)
https://onlinelibrary.wiley.com/doi/abs/10.1111/maps.13250

" We interpret these observations to indicate that there was a physical impact event, not just an airburst, and that the crater has been almost completely eroded since its formation."

Yours,

Paul H.