Including Original "Paul H. Letters" Copyright © 1996-2017 Paul V. Heinrich - All rights reserved.



Friday, 23 June 2017

Volcanoes, Not Impacts, Caused End Triassic Mass Extinction

Volcanoes, Not Impacts, Caused End Triassic Mass Extinction

Volcanic eruptions triggered dawn of the dinosaurs (Huge pulses of volcanic activity are likely to have
played a key role in triggering the end Triassic mass extinction, which set the scene for the rise and age
of the dinosaurs, new Oxford University research has found.)
http://www.heritagedaily.com/2017/06/volcanic-eruptions-triggered-dawn-dinosaurs/115652

https://www.sciencedaily.com/releases/2017/06/170619151530.htm

Dinosaurs got an evolutionary assist from huge volcanic eruptions by Mary Beth Griggs Popular Science
http://www.popsci.com/volcanic-eruptions-dinosaur-evolution

The paper is:
Lawrence M. E. Percival, Micha Ruhl, Stephen P. Hesselbo, Hugh C. Jenkyns, Tamsin A. Mather, and
Jessica H. Whiteside. Mercury evidence for pulsed volcanism during the end-Triassic mass extinction. PNAS, June 2017 DOI: 10.1073/pnas.1705378114
http://www.pnas.org/content/early/2017/06/13/1705378114

Unrelated article about volcanoes are:

Volcanic crystals give a new view of magma
https://phys.org/news/2017-06-volcanic-crystals-view-magma.html

and

Tracking the buildup to volcanic eruptions
University of Arizona, June 15, 2017
https://asunow.asu.edu/20170615-discoveries-asu-scientists-tracking-buildup-volcanic-eruptions

Crystals once deep inside a volcano offer new view of magma, eruption timing (Volcanologists are gaining a better understanding of what’s going on inside the magma reservoir that lies below New Zealand’s Mount Tarawera volcano. They’re finding a colder, more solid place than they thought, according to research published today in the journal Science.)
http://www.heritagedaily.com/2017/06/crystals-deep-inside-volcano-offer-new-view-magma-eruption-timing/115558

The paper is;
Rubin, A.E., Cooper, K.M., Till, C.B., Kent, A.J., Costa, F., Bose, M., Gravley, D., Deering, C. and
Cole, J., 2017. Rapid cooling and cold storage in a silicic magma reservoir recorded in individual
crystals. Science, 356(6343), pp.1154-1156. science.sciencemag.org/cgi/doi/10.1126/science.aam8720
http://science.sciencemag.org/content/356/6343/1154

Yours,

Paul H.

Friday, 9 June 2017

A volcanic trigger for the Late Ordovician mass extinction?

A volcanic trigger for the Late Ordovician mass extinction?

Interesting open access paper on mass extinctions.

Jones, D. S., A. M. Martini, D. A. Fike, and K. Kaiho, 2017,
A volcanic trigger for the Late Ordovician mass extinction?
Mercury data from south China and Laurentia. Geology v. 45; no. 7; p. 631–634

http://geology.geoscienceworld.org.libezp.lib.lsu.edu/content/45/7/631

http://geology.geoscienceworld.org.libezp.lib.lsu.edu/content/45/7

Yours,

Paul H.

Thursday, 8 June 2017

Monday, 5 June 2017

Massive Craters formed by Methane Blow-outs

Massive Craters formed by Methane Blow-outs

Massive craters formed by methane blow-outs from
the Arctic sea floor, June 1, 2017

https://phys.org/news/2017-06-massive-craters-methane-blow-outs-arctic.html

https://www.sciencedaily.com/releases/2017/06/170601151803.htm

the paper is;

K. Andreassen, A. Hubbard, M. Winsborrow, H. Patton, S. Vadakkepuliyambatta, A. Plaza-Faverola, E. Gudlaugsson, P. Serov, A. Deryabin, R. Mattingsdal, J. Mienert, and S. Bünz,
2017, Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor. Science. Vol. 356, Issue 6341, pp. 948-953 DOI: 10.1126/science.aal4500

http://science.sciencemag.org/content/356/6341/948

Another paper is:

Long, D., Lammers, S. and Linke, P., 1998. Possible hydrate mounds within large sea-floor craters in the Barents Sea.Geological Society, London, Special Publications, 137(1), pp.223-237.

https://www.researchgate.net/publication/269630462_Possible_hydrate_mounds_within_large_sea-floor_craters_in_the_Barents_Sea

https://www.researchgate.net/profile/P_Linke/publications/6

Yours,

Paul H.

Sunday, 4 June 2017

Is the Falkland Islands Basin an Enormous Impact Structure ?

Is the Falkland Islands Basin an Enormous Impact Structure ?

Falkland Islands basin shows signs of being among world's
largest craters, New York University, May 4, 2017
https://www.sciencedaily.com/releases/2017/05/170504131658.htm

Falkland Islands basin shows signs of being among world's
largest craters, Engineering, Science and Technology Research
New York University, May 4, 2017
http://www.nyu.edu/about/news-publications/news/2017/may/falkland-islands-basin-shows-signs-of-being-among-worlds-largest.html

The paper is:

Rocca, M.C., Rampino, M.R. and Báez Presser, J.L., 2017.
Geophysical evidence for a large impact structure on the
Falkland (Malvinas) Plateau. Terra Nova.
http://onlinelibrary.wiley.com/doi/10.1111/ter.12269/abstract

Another paper is:

Rocca, M. C. L., & Baez Presser, J. L., 2015. A possible new very
large impact structure in Islas Malvinas. Historia Natural,
Tercera Serie, 5, 121–133.
https://www.researchgate.net/publication/283123311_A_POSSIBLE_NEW_VERY_LARGE_IMPACT_STRUCTURE_IN_MALVINAS_ISLANDS

Yours,

Paul H.

Friday, 2 June 2017

Recent Chapter About Corossol Impact Structure, Gulf of St Lawrence, eastern Canada

Recent Chapter About Corossol Impact Structure, Gulf of St Lawrence, eastern Canada

Lajeunesse, P., Duchesne, M.J., St-Onge, G., Locat, J., Higgins, M., Sanfacon, R. and Ortiz, J., 2016. The Corossol Structure: a glaciated crater of possible impact origin in the northwestern Gulf of St Lawrence, eastern Canada.
Geological Society, London, Memoirs, 46(1), pp.127-128.

PDF file:
http://www.ismer.ca/IMG/pdf/lajeunesse_et_al_2016_corossol_atlas.pdf

Abstract:
http://mem.lyellcollection.org/content/46/1/127.short

Yours,
Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)