Buried impact crater beneath the Everglades, Florida? 23JUL2020

 Buried impact crater beneath the Everglades, Florida?

The below paper proposes the possibility that a buried

 impact crater underlie the Everglades. there should be

enough data around to test.

 

Petuch, E.J., 1987. The Florida Everglades: A Buried

Pseudoatoll?. Journal of Coastal Research, pp.189-200.

https://pdfs.semanticscholar.org/7ec5/d3b02541aafb82280c81c50ac87812fa95e5.pdf

 

Yours,

 

Paul H.

Asteroid shower on the Earth-Moon system 800 million years ago 22JUL2020

 Asteroid shower on the Earth-Moon system 800 million years ago

Asteroid shower rained space rocks on

Earth and the moon 800 million years ago

By Charles Q. Choi, SpaceCom, July 21, 2020

https://www.space.com/800-million-year-old-asteroid-shower-moon-earth.html

Asteroid shower on the Earth-Moon system

800 million years ago revealed by lunar craters

by Osaka University, PhysOrg, July 21, 2020

https://phys.org/news/2020-07-asteroid-shower-earth-moon-million-years.html

The open access paper is:

Terada, K., Morota, T. & Kato, M. Asteroid shower

on the Earth-Moon system immediately before

the Cryogenian period revealed by KAGUYA.

Nature Communications (2020). DOI: 10.1038/s41467-020-17115-6

https://www.nature.com/articles/s41467-020-17115-6

Yours,

Paul H.

High Pressure Polymorph of Feldspar Discovered 14JUL2020

 High Pressure Polymorph of Feldspar Discovered

A new form of the rock-forming mineral discovered

High-pressure experiments reveal unknown variants

of common mineral by Amit Malewar, June 1, 2020

https://www.techexplorist.com/new-form-common-rock-forming-mineral-discovered/32716/

 

Pakhomova, A., Simonova, D., Koemets, I., Koemets,

E., Aprilis, G., Bykov, M., Gorelova, L., Fedotenko, T.,

Prakapenka, V. and Dubrovinsky, L., 2020.

Polymorphism of feldspars above 10 GPa. Nature

Communications, 11(1), pp.1-8.

https://www.nature.com/articles/s41467-020-16547-4

 

Yours,

 

Paul H.

Moon contains more metal than previously estimated 08JUL2020

 Moon contains more metal than previously estimated

Higher concentration of metal in Moon's

craters provides new insights to its origin

New observations could challenge previous

theories of how the Moon was formed

University of Southern California, July 1, 2020

https://www.sciencedaily.com/releases/2020/07/200701151724.htm

The paper is:

E. Heggy, E.M. Palmer, T.W. Thompson, B.J.

Thomson, G.W. Patterson. Bulk composition

of regolith fines on lunar crater floors: Initial

investigation by LRO/Mini-RF. Earth and

Planetary Science Letters, 2020; 541: 116274

https://www.researchgate.net/publication/341324791_Bulk_composition_of_regolith_fines_on_lunar_crater_floors_Initial_investigation_by_LROMini-RF

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

https://www.sciencedirect.com/science/article/abs/pii/S0012821X2030217X

Yours,

Paul V.

New insights into the Great Dying, the Permo-Triassic mass extinction 18JUN2020

 New insights into the Great Dying, the Permo-Triassic mass extinction

New insight into the Great Dying, University of Leeds, June 11, 2020

https://phys.org/news/2020-06-insight-great-dying.html

The open access paper is:

Jacopo Dal Corso, Benjamin J. W. Mills, Daoliang Chu,

Robert J. Newton, Tamsin A. Mather, Wenchao Shu,

Yuyang Wu, Jinnan Tong, and Paul B. Wignall (2020)

Permo-Triassic boundary carbon and mercury cycling

linked to terrestrial ecosystem collapse.

Nature Communications 11, Article number: 2962

doi: https://doi.org/10.1038/s41467-020-16725-4

https://www.nature.com/articles/s41467-020-16725-4

https://www.nature.com/articles/s41467-020-16725-4.pdf

Another article is:

Coal-burning in Siberia led to climate change

250 million years ago, Arizona State University

https://asunow.asu.edu/20200615-coal-burning-siberia-led-climate-change-250-million-years-ago

The open access paper is:

Elkins-Tanton, L.T., Grasby, S.E., Black, B.A., Veselovskiy,

R.V., Ardakani, O.H. and Goodarzi, F., 2020. Field evidence

for coal combustion links the 252 Ma Siberian Traps with

global carbon disruption. Geology, 48. (open access)

https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47365.1/587319/Field-evidence-for-coal-combustion-links-the-252

Yours,

Paul H.

Cryptoexplosive Structures in Missouri: Guidebook, 1965 12JUN2020

 Cryptoexplosive Structures in Missouri: Guidebook, 1965

Snyder, F.G. and Williams, J.H., 1965. Cryptoexplosive

Structures in Missouri: Guidebook, 1965 Annual Meeting,

the Geological Society of America (No. 30). State of

Missouri, Division of Geological Survey and Water

Resources.

https://share.mo.gov/nr/mgs/MGSData/Books/Reports%20of%20Investigations/Guidebook,%201965%20Annual%20Meeting,%20Geological%20Society%20of%20America,%20Cryptoexplosive%20Structures%20in%20Missouri/RI-030.pdf

Yours,

Paul H.

Evidence for the Ordovician Meteorite event in Oklahoma, USA 04JUN2020

 Evidence for the Ordovician Meteorite event in Oklahoma, USA

Evidence for the Ordovician Meteorite event in Oklahoma, USA
https://www.researchgate.net/publication/337221532_Evidence_for_the_Ordovician_Meteorite_event_in_Oklahoma_USA
https://www.researchgate.net/profile/Elizabeth_Catlos

Yours,

Paul H.

UV-B radiation blamed for Devonian-Carboniferous boundary terrestrial extinction 02JUN2020

 UV-B radiation blamed for Devonian-Carboniferous boundary terrestrial extinction

End-Devonian Mass Extinction Caused by Erosion
of Ozone Layer, New Study Finds, Sci-News. May 28, 2020
http://www.sci-news.com/paleontology/end-devonian-mass-extinction-erosion-ozone-layer-08477.html

No asteroids needed: ancient mass extinction tied
to ozone loss, warming climate By Paul Voosen
Science News, May. 27, 2020
https://www.sciencemag.org/news/2020/05/no-asteroids-or-volcanoes-needed-ancient-mass-extinction-tied-ozone-loss-warming

The paper is:

John E. A. Marshall,  Jon Lakin, Troth, and
Sarah M. Wallace-Johnson, 2020, UV-B
radiation was the Devonian-Carboniferous
boundary terrestrial extinction kill mechanism.
Science Advances 27 May 2020: Vol. 6, no. 22, eaba0768
DOI: 10.1126/sciadv.aba0768
https://advances.sciencemag.org/content/6/22/eaba0768
https://advances.sciencemag.org/content/6/22/eaba0768/tab-pdf

yours,

Paul H.

Extinct Field Research Vehicles 30MAY2020

Extinct Field Research Vehicles

We all love our field vehicles that take us meteorite
or rock hunting. Below are some that went extinct.

There's a Massive Antarctic Exploration Vehicle Lost
Somewhere at the Bottom of the World. Last seen in
1958, it was designed to travel 5000 miles and
self-sustain for an entire year.
By Peter Holderithmay, the Drive, May 12, 2020
https://www.thedrive.com/news/33433/theres-a-massive-antarctic-exploration-vehicle-lost-somewhere-at-the-bottom-of-the-world

For more extinct megatechnology, there is:

The Incredible Story of the US Army's Earth-Shaking,
Off-Road Land Trains Oh, your pickup has a lift? That's cute.
By Peter Holderithmay, the Drive, May 25, 2020
https://www.thedrive.com/news/33645/the-incredible-story-of-the-us-armys-earth-shaking-off-road-land-trains

Yours,

Paul H.

Universe's Missing Matter Might Have Been Found 29MAY2020

 Universe's Missing Matter Might Have Been Found

Half the universe’s ordinary matter was missing —

and may have been found. The long-sought matter

appears to have been hiding in the gaps between galaxies

By Maria Temming, Science News, May 27, 2020

https://www.sciencenews.org/article/universe-missing-matter-found-fast-radio-bursts

The paper is:

Macquart, J., Prochaska, J.X., McQuinn, M. et al.

A census of baryons in the Universe from localized

fast radio bursts. Nature 581, 391–395 (2020).

https://doi.org/10.1038/s41586-020-2300-2

https://www.nature.com/articles/s41586-020-2300-2

Yours,

Paul H.

A steeply-inclined trajectory for the Chicxulub impact 28MAY2020

 A steeply-inclined trajectory for the Chicxulub impact

Dinosaur-dooming asteroid struck Earth at

'deadliest possible' angle Imperial College London, May 26, 2020

https://www.sciencedaily.com/releases/2020/05/200526111320.htm

Collins, G.S., Patel, N., Davison, T.M. et al. A steeply-

inclined trajectory for the Chicxulub impact. Nature

Communications 11, 1480 (2020).

https://www.nature.com/articles/s41467-020-15269-x

Another paper:

Rae, A.S., Collins, G.S., Poelchau, M., Riller, U., Davison,

T.M., Grieve, R.A., Osinski, G.R., Morgan, J.V. and

IODP-ICDP Expedition 364 Scientists, 2019. Stress‐Strain

Evolution During Peak‐Ring Formation: A Case Study

of the Chicxulub Impact Structure. Journal of

Geophysical Research: Planets, 124(2), pp.396-417.

https://eprints.gla.ac.uk/192907/1/192907.pdf

https://hal.umontpellier.fr/hal-02128150/document

Yours,

Paul H.

Free geology ebooks online until June 30, 2020 21MAY2020

 Free geology ebooks online until June 30, 2020

A number of GeoScienceWorld publishers,

including the Geological Society of America

made their ebooks open access and free

to download until June 30, 2020.

Go see "Public Access for Books" at:

https://pubs.geoscienceworld.org/pages/remote-access-information

https://www.facebook.com/202061616626716/posts/public-access-to-gsw-ebooksto-help-support-online-learning-and-remote-research-f/1556213207878210/

"To help support online learning and remote research

for the remainder of the semester, the following GSW

book publishers have extended public access to all of

their ebooks through June 30, 2020:

American Association of Petroleum Geologists

Canadian Science Publishing

Clay Minerals Society

Geological Society of America

Gulf PetroLink

Mineralogical Society of Great Britain and Ireland

PSAAPG

SEPM Society for Sedimentary Geology

Society of Economic Geologists

University of Wyoming"

https://pubs.geoscienceworld.org/books

Some of the Geological Society of America books are listed at:

https://pubs.geoscienceworld.org/gsa/pages/special-papers

https://pubs.geoscienceworld.org/gsa/pages/field_guides

https://pubs.geoscienceworld.org/gsa/pages/Memoirs

Examples of available meteorite themed publications are:

Chesapeake Bay Impact Structure—Development of "Brim"

Sedimentation in a Multilayered Marine Target

https://pubs.geoscienceworld.org/books/book/2141/Chesapeake-Bay-Impact-Structure-Development-of

Large Meteorite Impacts and Planetary Evolution V

https://pubs.geoscienceworld.org/books/book/685/Large-Meteorite-Impacts-and-Planetary-Evolution-V

Unusual Central Nevada Geologic Terranes Produced

by Late Devonian Antler Orogeny and Alamo Impact

https://pubs.geoscienceworld.org/books/book/679/Unusual-Central-Nevada-Geologic-Terranes-Produced

The Sedimentary Record of Meteorite Impacts

https://pubs.geoscienceworld.org/books/book/592/The-Sedimentary-Record-of-Meteorite-Impacts

Kentland Impact Structure chapters

https://pubs.geoscienceworld.org/books/book/2139/chapter/119685449/Hydrodynamic-role-of-groundwater-in-bolide-impact

https://pubs.geoscienceworld.org/books/book/818/chapter/3912744/Impact-geologyCentral-uplift-Kentland-impact

https://pubs.geoscienceworld.org/books/book/2139/chapter/119685666/On-the-backs-of-giants-Geology-of-the-Kentland

https://pubs.geoscienceworld.org/books/book/848/chapter/3919025/The-Kentland-Dome-IndianaA-structural-anomaly

Take Care, Be Safe,

Paul H.

American Geoscience Institute studies effects of COVID-19 on Geoscience jobs 18MAY2020

 American Geoscience Institute studies effects of COVID-19 on Geoscience jobs

The American Geoscience Institute is studying effects of COVID-19 on

employment in the Earth sciences. As part of this effort, they have the

"Geoscience COVID-19 Survey" at

https://www.americangeosciences.org/workforce/covid19 for Geoscientists

to participate in.

In the distant future will report the results of their research in a

webinar,

"The Geoscience Workforce: Current Trends and Impacts from COVID-19"

on Friday, September 18, 2020. It is at:

https://www.americangeosciences.org/webinars/geoscience-workforce-current-trends-and-impacts-covid-19

Yours,

Paul H.

New Investigation of a Greenland ice core platinum anomaly near the Bølling-Allerød/Younger Dryas boundary 15MAY2020

 New Investigation of a Greenland ice core platinum anomaly near the Bølling-Allerød/Younger Dryas boundary

Green, C. E., 2019. Investigating the origin of a Greenland ice

core geochemical anomaly near the Bølling-Allerød/Younger

Dryas boundary (Doctoral dissertation, Durham University).

http://etheses.dur.ac.uk/13490/

http://etheses.dur.ac.uk/13490/1/C_Green_thesis_final_CORRECTIONS.pdf

Green (2019) noted:

"The source of a platinum peak identified in the Greenland

Ice Sheet Project 2 (GISP2) ice core associated with high

platinum/iridium (Pt/Ir) and platinum/aluminium (Pt/Al)

ratios, and previous research attributed the anomaly to an

unusual iron-rich Ir-poor meteorite impact."

Green (2019) concluded:

I. the Laacher See eruption is not the Pt spike source because:

A. the Laacher See tephra has low Pt concentrations,

B. the Laacher See tephra’s geochemical ratios are dissimilar

to the GISP2 Pt spike and

C. conversion of the Pt spike timing to the newest ice core

age-depth model shows a chronological offset of ~60 years

between the two events.

II. The event resulting in the Pt spike occurred ~60 years

after GS-1 cooling, and was therefore not the primary

trigger.

III. and the Pt spike origin is interpreted as either:

A. a non-cataclysmic impact of an undiscovered iron meteorite

B. or an unidentified Pt-rich volcanic eruption contemporaneous

with the anomaly, whose aerosol fractionated in the atmosphere

or ice.

Yours,

Paul H.

Bucky balls reported from Cretaceous crinoids 14MAY2020

 Bucky balls reported from Cretaceous crinoids

Strange hollow ball-like structures found in

80-million-year-old fossils by University of Western Australia

https://phys.org/news/2020-05-strange-hollow-ball-like-million-year-old-fossils.html

Yours,

Paul H.

Antarctic meteorites yield global bombardment rate 01MAY2020

 Antarctic meteorites yield global bombardment rate

Antarctic meteorites yield global bombardment rate

By Jonathan Amos, BBC News, April 30, 2020

https://www.bbc.com/news/science-environment-52465237

This open access paper is:

G.W. Evatt, A.R.D. Smedley, K.H. Joy, L. Hunter, W.H. Tey,

I.D. Abrahams, and L. Gerrish, 2020, The spatial flux of

Earth’s meteorite falls found via Antarctic data. geology.

https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G46733.1/584575/The-spatial-flux-of-Earth-s-meteorite-falls-found

Yours,

Paul H.