Arctic Gives Clues on Worst Mass Extinction of Life

Arctic Gives Clues on Worst Mass Extinction of Life

Arctic gives clues on worst mass extinction of life
University of Tromso (Universitetet i Tromsø - UiT)
August 24, 2016
https://www.sciencedaily.com/releases/2016/08/160824111100.htm
http://phys.org/news/2016-08-arctic-clues-worst-mass-extinction.html

Grasby, S. E., B. Beauchamp, and J. Knies, 2016, Early Triassic
productivity crises delayed recovery from world’s worst mass
extinction. Geology. vol. 44, no. 9, pp. 779-782 DOI: 10.1130/G38141.1
http://geology.gsapubs.org/content/early/2016/08/05/G38141.1.abstract
ftp://rock.geosociety.org/pub/reposit/2016/2016263.pdf

An interesting, but unrelated paper is;

Hull, P. M., S. A. F. Darroch, and D. H. Erwin, 2015,
Rarity in mass extinctions and the future of ecosystems.
Nature. vol. 528, pp. 345-351.
http://people.earth.yale.edu/sites/default/files/files/Hull/Hulletal_nature_15.pdf

Yours,
Paul H.

Paleochannels Suggest Warm, Wet Ancient Mars

Paleochannels Suggest Warm, Wet Ancient Mars

Fossilized rivers suggest warm, wet ancient Mars
University College London, August 23, 2016
http://phys.org/news/2016-08-fossilized-rivers-ancient-mars.html
https://www.sciencedaily.com/releases/2016/08/160823135135.htm

The paper is:

Davis, J. M., M. Balme, P. M. Grindrod, R. M. E. Williams and
S. Gupta, 2016, Extensive Noachian fluvial systems in Arabia
Terra: Implications for early Martian climate. Geology.
First published online August 2016, doi: 10.1130/G38247.1
http://geology.gsapubs.org/content/early/2016/08/23/G38247.1.abstract

Yours,

Paul H

Have Martian Fossils Been Obliterated by Meteorite Impacts ?

Have Martian Fossils Been Obliterated by Meteorite Impacts ?

Have signs of Martian life been obliterated by meteorite
blasts? Daily Mail, August 9, 2016
http://www.dailymail.co.uk/sciencetech/article-3731884/Have-signs-Martian-life-obliterated-meteorite-blasts-Extreme-pressures-impact-wipe-organic-compounds-study-finds.html

Meteors might have wiped out evidence of life on
Mars in the places we’re looking by Josh Hrala
Science Alert, August 12, 2016
http://www.sciencealert.com/impact-craters-are-not-the-best-places-to-look-for-signs-of-life-on-mars-study-finds

Evidence of Martian life could be hard to find in
some meteorite blast sites, Imperial College London
http://www3.imperial.ac.uk/newsandeventspggrp/imperialcollege/newssummary/news_8-8-2016-12-31-10
http://www.sciencenewsline.com/news/2016080815080028.html
https://www.sciencedaily.com/releases/2016/08/160808091250.htm

The paper is:

Montgomery, W., G. D. Bromiley, and M. A. Sephton.
2016, The nature of organic records in impact
excavated rocks on Mars. Scientific Reports.
Vol. 6, no. 30947 DOI: 10.1038/srep30947
http://www.nature.com/articles/srep30947

Another recent article about meteorite impacts is:

How Often do Meteorites Hit the Earth?
Space.com by Samantha Mathewson, August 10, 2016
http://www.space.com/33695-thousands-meteorites-litter-earth-unpredictable-collisions.html

Yours,

Paul H.

We Have A Neighbor

We Have A Neighbor

In "We Have A Neighbor," Mrs. Webb wrote:

"Hi,"We have a neighboring planet
only 4 light years away. It's
small, earth-like, in the
habitable zone of its star,
yada-yada.

Everybody's going crazy...

Me too."

The paper is:

Anglada-Escudé, G., P. J. Amado, J. Barnes, and others, 2016, A
terrestrial planet candidate in a temperate orbit around Proxima
Centauri. Nature. vol. 536, pp. 437–440 (25 August 2016) doi:10.1038/nature19106
http://www.nature.com/nature/journal/v536/n7617/full/nature19106.html

PDF file at
https://www.eso.org/public/archives/releases/sciencepapers/eso1629/eso1629a.pdf

Yours,

Paul H.

New methodology for Estimating Size of Impact Craters

New methodology for Estimating Size of Impact Craters

New methodology provides better size estimates of meteorite
impact craters. University of Western Ontario, August 8, 2016
http://mediarelations.uwo.ca/2016/08/05/new-methodology-provides-better-size-estimates-meteorite-impact-craters/
http://phys.org/news/2016-08-methodology-size-meteorite-impact-craters.html

The paper is:

Osinski, G. R., and L. Ferrière, 2016, Shatter cones: (Mis)understood?
Science Advances. Science Advances. Vol. 2, no. 8, e1600616
DOI: 10.1126/sciadv.1600616
http://advances.sciencemag.org/content/2/8/e1600616

Yours,

Paul H.

Where are all the Large impact Craters on Ceres?

Where are all the Large impact Craters on Ceres?

Where are all the large impact craters on Ceres? July 28, 2016
http://www.nasa.gov/feature/jpl/the-case-of-the-missing-ceres-craters
https://www.middaydaily.com/ceres-huge-impact-craters/25755/
http://www.extremetech.com/extreme/232532-where-are-all-the-large-impact-craters-on-ceres

The paper is:

Marchi, S., A. I. Ermakov, C. A. Raymond, and many others, 2016
The missing large impact craters on Ceres Nature Communications.
vol. 7, Article number: 12257, doi:10.1038/ncomms12257
http://www.nature.com/ncomms/2016/160726/ncomms12257/full/ncomms12257.html

Yours,

Paul H.

60Iron Found in Magnetofossils: Evidence of Supernova?

60Iron Found in Magnetofossils: Evidence of Supernova?

Supernova Ashes Found in Fossils Hint at Extinction Event
By Charles Q. Choi, Space.com, August 18, 2016
http://www.space.com/33777-supernova-ash-found-in-fossils.html

Scientists Identify Supernova Ashes in Magnetic Fossils
Sputnik.News, http://sptnkne.ws/bWPg
http://sputniknews.com/world/20160819/1044417107/supernova-linked-to-extinction.html

“Supernova ash has been found in fossils created by bacteria
here on Earth. The discovery, published on August 10 in the
Proceedings of the National Academy of Sciences journal,
suggests a link between an explosion of a star and an
extinction event on our planet over two million years ago.”

The paper is:

Ludwiga, P., S. Bishopa, R. Eglib, et al., 2016, Time-resolved
2-million-year-old supernova activity discovered in Earth’s
microfossil record. Proceedings of the National Academy of
Sciences. vol. 113 no. 33, pp. 9232–9237, doi: 10.1073/pnas.1601040113
http://www.pnas.org/content/113/33/9232.abstract?sid=b595085e-c6e9-4588-9cb5-6f7364cc2ceb

Yours,

Paul H.

Recent Articles About Fossil Hunting Laws and Regulations- Canada

Recent Articles About Fossil Hunting Laws and Regulations - Canada Dinosaurs

Below are a couple of articles about laws and regulations
for fossil hunting that raise either the same or similar issues
that concern collecting meteorites.

Welcome to Alberta, Canada: Socialist Dinosaur Paradise Inverse,
(The bones belong to the people) Jacqueline Ronson, August 17, 2016
https://www.inverse.com/article/19840-alberta-canada-dinosaur-paleontology-fossil-collection-laws-socialism

4 Weird True Crime Stories From the Dinosaur Fossil Black Market
(Unpredictable laws and high demand create the perfect environment
for illegal enterprise) by Jacqueline Ronson, Inverse, May 22, 2016.
https://www.inverse.com/article/15914-4-weird-true-crime-stories-from-the-dinosaur-fossil-black-market

The articles, do not necessarily represent my views. If you need
comment about them, either post your comments as a reply to
this thread or correspond with the authors of the article.

Finally, an article that is unrelated to meteorites, but still quite
interesting.

Joel, L. (2016), How did fragile early microbes become fossils?,
Eos, 97, doi:10.1029/2016EO057519. Published on 12 August 2016.
https://eos.org/articles/how-did-fragile-early-microbes-become-fossils
https://eos.org/current-issues

(During the Ediacaran period more than a half billion years ago,
clay mineral coats likely shielded delicate remains, helping
them become exquisitely preserved in rock, recent experiments
suggest.)

Yours,

Paul H.

Lasers Used to Simulate Giant Extraterrestrial Impacts

Lasers Used to Simulate Giant Extraterrestrial Impacts

Lasers melt rocks to reveal development of super-Earths
and how giant impacts make magma, Hiroshima University
http://www.dailymail.co.uk/sciencetech/article-3722097/Rock-melting-lasers-reveal-Earth-like-planets-magma-form.html
https://www.sciencedaily.com/releases/2016/08/160803143117.htm
http://phys.org/news/2016-08-lasers-reveal-super-earths-giant-impacts.html

The paper is:

Sekine T., Ozaki N., Miyanishi K., Asaumi Y., Kimura T.,
Albertazzi, Y. S., Sakawa, Y., Sano, T., Sugita, S., Matsui,
T., and Kodama, R., 2016, Shock compression response
of forsterite above 250 GPa Science Advances.
Vol. 2, no. 8, e1600157 DOI: 10.1126/sciadv.1600157
http://advances.sciencemag.org/content/2/8/e1600157

Yours,

Paul H.

Fulgurites Used to Measure Lightning Strike's Energy

Fulgurites Used to Measure Lightning Strike's Energy

Study Provides a New Method to Measure the Energy
of a Lightning Strike By investigating “fossilized”
sand cylinders made by lightning strikes, sometimes
thousands of years old, a University of South Florida
professor provides a unique history of lightning and
the energy contained in a single strike.
http://news.usf.edu/article/templates/?a=7453&z=220

Scientists Measure Lightning Energy With Fossils
by Jon Mendoza Aug 04, 2016 03:45 AM EDT
http://www.natureworldnews.com/articles/26250/20160804/scientists-measure-lightning-energy-fossils.htm

Florida researchers develop new method of calculating
lightning strike's energy using geological methods
French Tribune
http://frenchtribune.com/teneur/1624974-florida-researchers-develop-new-method-calculating-lightning-strike-s-energy-using

The paper is:

Pasek, M. A., and M. Hurst, 2016, A Fossilized Energy
Distribution of Lightning Scientific Reports. Vol. 6,
Article number: 30586
http://www.nature.com/articles/srep30586

Yours

Paul H.