New PhD. Dissertation About Younger Dryas Impact Hypothesis

New PhD. Dissertation About Younger Dryas Impact Hypothesis

van Hoesel, A., 2014, The Younger Dryas climate change
was it caused by an extraterrestrial impact? Utrecht 
studies in Earth Sciences no. 54. Utrecht University, 
Utrecht, Netherlands. 141 pp. ISBN: 978-90-6266-356-9 
(Open Access Theses and Dissertations)
http://dspace.library.uu.nl:8080/handle/1874/294136
http://dspace.library.uu.nl:8080/bitstream/handle/1874/294136/vanHoesel.pdf?sequence=2

Some other miscellaneous publications:

van Hoesel, A., 2012, The Younger Dryas impact 
hypothesis: a critical review. (poster)
https://www.academia.edu/1232265/The_Younger_Dryas_impact_hypothesis_a_critical_review

van Hoesel, A., 2012, Een meteorietinslag aan hetbegin 
van de Jonge Dryas? Geo.brief June 2012, pp. 10-11.
https://www.academia.edu/4189150/Een_meteorietinslag_aan_het_begin_van_de_Jonge_Dryas
https://leidenuni.academia.edu/AnneliesvanHoesel

Yours,

Paul H.

Charity Shoal Crater, an Exhumed Middle Ordovician Impact Crater

Charity Shoal Crater, an Exhumed Middle Ordovician Impact Crater

Holcombe, T. L., S. Youngblut, and N. Slowey, 2013,
Geological structure of Charity Shoal crater, Lake
Ontario, revealed by multi beam bathymetry. Geo-Marine
Letters. col. 33, no. 4, pp 245-252
http://link.springer.com/article/10.1007%2Fs00367-013-0322-6
http://adsabs.harvard.edu/abs/2013GML....33..245H

They argue that the Charity Shoal Crater in Lake
Ontario formed as the result of an extraterrestrial
impact event in a shallow marine environment during
the Middle Ordovician. After the impact, it was
eventually buried by post-impact marine
sedimentation, which covered it with fossiliferous
marine carbonate strata. Much later, they argue,
it was exhumed by Pleistocene glacial erosion.

Other publications are:

Holcombe, T. L., J. S. Warren, D. F. Reid, W. T.
Virden, and D. L. Divins, 2001, Small Rimmed Depression
in Lake Ontario: An Impact Crater? Journal of Great
Lakes Research. vol. 27, no. 4, pp. 510-517
PDF file at http://www.glerl.noaa.gov/pubs/fulltext/2001/20010012.pdf
abstract at https://www.sciencedirect.com/science/journal/03801330/27/4

Phillip, S. A., 2013, High-resolution lake-based
magnetic mapping and modelling of basement structures,
with examples from Küçükçekmece Lagoon, Turkey and
Charity Shoal, Lake Ontario. unpublished MS thesis,
School of Geography and Earth Sciences, McMaster
University, Hamilton, Ontario. 113 pp.
https://macsphere.mcmaster.ca/handle/11375/13532

Bathymetric map of Charity Crater area.

Great Lakes Data Rescue Project - Lake Ontario Bathymetry
https://www.ngdc.noaa.gov/mgg/greatlakes/lakeontario_cdrom/html/area12.htm
https://www.ngdc.noaa.gov/mgg/greatlakes/lakeontario_cdrom/images/a12_lg.jpg

Yours,

Paul H.

The Proterozoic Oxygen Rise

The Proterozoic Oxygen Rise

Earth's breathable atmosphere a result of continents
taking control of the carbon cycle, University of
Exeter, Science Daily, June 9, 2014
http://www.sciencedaily.com/releases/2014/06/140609153433.htm
http://www.exeter.ac.uk/news/featurednews/title_385882_en.html

Mills, B., T. M. Lenton, and A. J. Watson, 2014,
Proterozoic oxygen rise linked to shifting balance
between seafloor and terrestrial weathering.
Proceedings of the National Academy of Sciences
of the United States of America. Published online
before print June 9, 2014.
http://www.pnas.org/content/early/2014/06/04/1321679111

A related article is:
Geologists confirm oxygen levels of ancient oceans
Syracuse University, Science Daily, June 10, 2014
http://www.sciencedaily.com/releases/2014/06/140610144656.htm
http://www.sciencenewsline.com/summary/2014061016380031.html

Hardisty, D. S. , Z. Lu, N. J. Planavsky, A. Bekker,
P. Philippot, X. Zhou, and T. W. Lyons, 2014, An
iodine record of Paleoproterozoic surface ocean
oxygenation. Geology. First published online May 22, 2014,
http://geology.gsapubs.org/content/early/2014/05/21/G35439.1

A related paper is:
Lyons, T. W., C. T. Reinhard, and N. J. Planavsky, 2014,
The rise of oxygen in Earth’s early ocean and atmosphere.
Nature. vol. 506, no. 7488, pp. 307-315.
http://www.nature.com/nature/journal/v506/n7488/full/nature13068.html

PDF file at: http://media.egu.eu/media/documents/2014/22/oxygenreviewnature.pdf

Yours,

Paul H.

Where have all the craters gone?

Where have all the craters gone?

Where have all the craters gone? Geological Society
of America, ScienceDaily, May 27, 2014
http://www.sciencedaily.com/releases/2014/05/140527154715.htm

The paper is:
Johnson, B. C., and T. J. Bowling, 2014, Where have
all the craters gone? Earth's bombardment history and
the expected terrestrial cratering record. Geology.
First published online May 22, 2014, doi: 10.1130/G35754.1
http://geology.gsapubs.org/content/early/2014/05/21/G35754.1

An older and related article is:
Tiny 'spherules' reveal details about Earth's asteroid
impacts, Purdue University, April 25, 2012
http://www.purdue.edu/newsroom/research/2012/120425MeloshImpacts.html
http://www.sciencedaily.com/releases/2012/04/120425140316.htm

The paper is:
Johnson, B. C., and H. J. Melosh, 2012, Impact
spherules as a record of an ancient heavy bombardment
of Earth. Nature. vol. 485, no. 7396, pp. 75–77.
http://www.nature.com/nature/journal/v485/n7396/full/nature10982.html

Yours,

Paul H.

-----


MikeG wrote:

>(Keep posting the links though - every
>now and then, one of the papers is free)

The abstract for the PDF of the Lunar and Planetary
Science Conference version of Johnson and Bowling
(2014) is at http://www.hou.usra.edu/meetings/lpsc2014/pdf/2414.pdf

Th PDF file of Johnson and Melosh (2012) is at
http://211.144.68.84:9998/91keshi/Public/File/34/485-7396/pdf/nature10982.pdf

Yours,

Paul H.

Four-billion-year-old rocks yield clues about Earth's earliest crust

Four-billion-year-old rocks yield clues about Earth's earliest crust

Four-billion-year-old rocks yield clues about Earth's
earliest crust. ScienceDaily, University of Alberta
http://www.sciencedaily.com/releases/2014/05/140529112057.htm
News360 at http://news360.com/article/241073278 ; and

Ancient rocks yield clues about Earth's earliest crust
by Bryan Alary, University of Alberta, May 28, 2014
http://news.ualberta.ca/newsarticles/2014/may/ancient-rocks-yield-clues-about-earths-earliest-crust

Reimink, J. R., T. Chacko, R. A. Stern, L. M. Heaman,
2014, Earth’s earliest evolved crust generated in an
Iceland-like setting. Nature Geoscience. Published
online May 25, 2014 10.1038/ngeo2170
http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2170.html

A related article is:
Lunar Rocks Are First Direct Evidence of Collision
That Formed Moon, National eographic, June 6, 2014.
http://news.nationalgeographic.com/news/2014/06/140605-earth-moon-theia-evidence-space-science/

Body that formed the Moon came from a different
neighborhood. (The body that smacked into Earth
has a distinctive elemental signature.) Ars Technica
http://arstechnica.com/science/2014/06/body-that-formed-the-moon-came-from-a-different-neighborhood/

Herwartz, D., A. Pack, B. Friedrichs, and A. Bischoff,
2014, Identification of the giant impactor Theia in lunar
rocks. Science. vol. 344, no. 6188, pp. 1146-1150
DOI: 10.1126/science.1251117
http://www.sciencemag.org/content/344/6188/1146

yours,

Paul H.

A Long-Ago Ancestor: A Little Fish, With Jaws to Come

A Long-Ago Ancestor: A Little Fish, With Jaws to Come

A Long-Ago Ancestor: A Little Fish, With Jaws to Come
by Carl Zimmer, New York Times, June 11, 2014
http://www.nytimes.com/2014/06/12/science/a-long-ago-ancestor-a-little-fish-with-incipient-jaws.html

New fossil find pinpoints the origin of jaws in vertebrates
PhysOrg, June 11, 2014
http://phys.org/news/2014-06-fossil-jaws-vertebrates.html

Chew On This Fantastic New Fossil by Jane Hu, Slate
http://www.slate.com/blogs/wild_things/2014/06/11/new_fossil_shows_evolution_of_jaws_metaspriggina_gill_arches_from_the_burgess.html

The paper is:
Morris, S. M., and J.-B. Caron, 2014, A primitive fish
from the Cambrian of North America. Nature, Published
online 11 June 2014http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13414.html

Additional web pages:
Metaspriggina, Wikipedia,
https://en.wikipedia.org/wiki/Metaspriggina

Metaspriggina walcotti, The Burgess Shale, Royal
Ontario Museum http://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=81

Yours,

Paul H.

Lunar Rocks Are First Direct Evidence of Collision That Formed Moon

Lunar Rocks Are First Direct Evidence of Collision That Formed Moon

Lunar Rocks Are First Direct Evidence of Collision
That Formed Moon, National eographic, June 6, 2014.
http://news.nationalgeographic.com/news/2014/06/140605-earth-moon-theia-evidence-space-science/

Body that formed the Moon came from a different
neighborhood. (The body that smacked into Earth
has a distinctive elemental signature.) Ars Technica
http://arstechnica.com/science/2014/06/body-that-formed-the-moon-came-from-a-different-neighborhood/

Herwartz, D., A. Pack, B. Friedrichs, and A. Bischoff,
2014, Identification of the giant impactor Theia in lunar
rocks. Science. vol. 344, no. 6188, pp. 1146-1150
DOI: 10.1126/science.1251117
http://www.sciencemag.org/content/344/6188/1146

Also, there is:
Four-billion-year-old rocks yield clues about Earth's
earliest crust. ScienceDaily, University of Alberta
http://www.sciencedaily.com/releases/2014/05/140529112057.htm
News360 at http://news360.com/article/241073278 ; and

Ancient rocks yield clues about Earth's earliest crust
by Bryan Alary, University of Alberta, May 28, 2014
http://news.ualberta.ca/newsarticles/2014/may/ancient-rocks-yield-clues-about-earths-earliest-crust

Reimink, J. R., T. Chacko, R. A. Stern, L. M. Heaman,
2014, Earth’s earliest evolved crust generated in an
Iceland-like setting. Nature Geoscience. Published
online May 25, 2014 10.1038/ngeo2170
http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2170.html

Yours,

Paul H.

A Habitable Environment on Martian Volcano?

A Habitable Environment on Martian Volcano?

Life on Mars could have flourished on the flanks
of a giant Martian volcano in the relatively recent
past, The Guardian, May 28,2014
http://www.theguardian.com/science/across-the-universe/2014/may/28/mars-volcano-alien-life

Martian Slopes of Arsia Mons May Have Been
Home to a Habitable Environment. SciTech Daily
http://scitechdaily.com/martian-slopes-arsia-mons-may-home-habitable-environment/

A habitable environment on Martian volcano?
Bronw University, Kevin Stacey, May 27, 2014
http://news.brown.edu/pressreleases/2014/05/mars

The paper is:

Scanlon, K. E., J. W. Head, L. Wilson, and D. R.
Marchant, 2014, Volcano–ice interactions in the
Arsia Mons tropical mountain glacier deposits.
Icarus vol. 237, pp. 315-339.
https://www.sciencedirect.com/science/article/pii/S0019103514002164

Yours,

Paul H.

An ancient glacial system in Valles Marineris, Mars

An ancient glacial system in Valles Marineris, Mars

An ancient glacial system in Valles Marineris, Mars
Post by O. Bourgeois, M. Gourronc, D. Mège and S. Pochat – Laboratoire de Planétologie et Géodynamique, Université de Nantes, France
http://planetarygeomorphology.wordpress.com/

Yours,
Paul H.

Online NASA Translation of Soviet Tektite Paper

Online NASA Translation of Soviet Tektite Paper

While looking for some other information, I came across
the below, interesting online, Public Domain paper about
tektites that was translated from the Soviet literature.

Vorobyev, G. G. 1973, What do you know About Tektites.
Translation of "Chto Vy Znayete o Tektitakh?" Moscow,
"Nauka" Press, 1966, 112 pages. NASA techdoc no. 19730020646
(Report no. ASA TT F-15,052) National Areonautics and
Space Administration, Washington DC, August 1, 1973.

https://archive.org/details/nasa_techdoc_19730020646

The abstract reads:

“The discovery and geographical distribution of tektites is
presented and analyzed in this popular account of tektites.
Uses made of tektites by ancient and present-day peoples
are examined as possibly indicative of tektite origins.
The various theories on the origin of tektites are weighed.
Field collection of tektites in South Czechoslovakia is
described. The rise and waning and revival of interest in
tektites is traced. Tektite strewnfields are delineated and
related to possible impact of asteroids or lunar material
on the earth.”

Yours,

Paul H.

Unique Crystals - Putnisite - Western Australia

Unique Crystals - Putnisite - Western Australia

Unique Crystals: Newfound Mineral Is Like No Other
Apr 28, 2014 02:00 PM ET // by Jeanna Bryner, DiscoveryNews
http://news.discovery.com/earth/rocks-fossils/unique-crystals-newfound-mineral-is-like-no-other-140428.htm

Unique Crystals: Newfound Purple-Pink Mineral Is
Like No Other, Livescience, April 28, 2014.
http://www.livescience.com/45175-unique-putnisite-mineral-discovered.html

The paper is:

Elliott, P., G. Giester, R. Rowe, and A. Pring, 2014,
Putnisite, SrCa4Formula (CO3)8SO4(OH)16·25H2O,
a new mineral from Western Australia: description
and crystal structure Mineralogical Magazine.
vol. 78, pp. 131-144, doi:10.1180/minmag.2014.078.1.10
http://minmag.geoscienceworld.org/content/78/1/131.abstract?sid=97893031-5041-4b8e-a0d1-d8a7753bae1a

Yours,

Paul H.

Study of Bull Creek, Oklahoma Holocene And Pleistocene Nannodiamonds

Study of Bull Creek, Oklahoma Holocene And Pleistocene Nannodiamonds

Study in Oklahoma panhandle finds additional
active process producing nanodiamonds, PhysOrg.
http://phys.org/news/2014-01-oklahoma-panhandle-additional-nanodiamonds.html

Bement, L. C., A. S. Madden, B. J. Carter, A. R. Simms,
A. L. Swindle, H. M. Alexander, S. Fine, and M. Benamarae
2014, Quantifying the distribution of nanodiamonds in
pre-Younger Dryas to recent age deposits along Bull Creek,
Oklahoma Panhandle, USA. Published online before print
January 21, 2014, doi: 10.1073/pnas.1309734111
http://www.pnas.org/content/early/2014/01/16/1309734111.abstract

Yours,

Paul H.

Study Disputes Younger Dryas Event Comet

Study Disputes Younger Dryas Event Comet

Study Questions Younger Dryas Event Comet
Theories, Red Orbit, May 14, 2014
http://www.redorbit.com/news/science/1113145713/younger-dryas-event-comet-impact-theory-051414/

Research team claims no evidence of
extraterrestrial impact causing Younger
Dryas deep freeze, PhysOrg, May 13, 2104
http://phys.org/news/2014-05-team-evidence-extraterrestrial-impact-younger.html
http://phys.org/wire-news/161418589/comet-theory-doesnt-explain-cold-snap-at-the-end-of-the-ice-age.html

Meltzer, D. J., V. T. Holliday, M. D. Cannon, and
D. S. Miller, 2014, Chronological evidence fails to
support claim of an isochronous widespread layer of
cosmic impact indicators dated to 12,800 years ago.
Proceedings of the National Academy of Science
of the United Staea of America. Early Edition.
http://www.pnas.org/content/early/2014/05/08/1401150111.abstract

Yours,

Paul H.

New Impact Structure? (Alberta, Canada)

New Impact Structure? (Alberta, Canada), Bow City Impact Crater

Ancient crater points to massive meteorite strike. University of
Alberta. ScienceDaily / Live Science, May 7, 2014.
http://www.sciencedaily.com/releases/2014/05/140507105023.htm
http://www.livescience.com/45412-ancient-meteorite-carved-giant-crater.html

Ancient Impact Crater Discovered in Canada by Sci-News.com
http://www.sci-news.com/geology/science-bow-city-impact-crater-canada-01913.html

The papers are:

Glombick, P., D. R. Schmitt, W. Xie, T. Bown, B. Hathway,
and C. Banks, 2014, The Bow City structure, southern Alberta,
Canada: The deep roots of a complex impact structure?
Meteoritics & Planetary Science, 2014; DOI: 10.1111/maps.12296
http://onlinelibrary.wiley.com/doi/10.1111/maps.12296/abstract

Xie, W., and D. R. Schmitt, 2014, Seismic Seismic Study of
a Possible Eroded Impact StructureSouthern, Alberta.
GeoConvention 2014: FOCUS
http://www.geoconvention.com/uploads/abstracts/473_GC2014_Seismic_Study_of_Possible_Eroded_Impact_Structure_Southern_AB.pdf

Yours,

Paul H.

New Geology About Non-Impact Circular Features

New Geology About Non-Impact Circular Features - Polygonal
faults in chalk

An interesting paper by Dr. B. J. Tewksbury an others
has been published online in Geology. It talks about a
well exposed system of polygonal faults that are
exposed in outcropping chalks in the Western Desert
of Egypt at Latitude 27.289982 N, Longitude 28.491490 E.
There polygonal fault systems form numerous circular
structures displaying shallow inward dips. Although they
would not confuse expert interpreters of aerial imagery,
amateur fans of Google Earth might confuse them with
an impact crater field. They do show that ther are a
variety of non-impact processes that can create circular
structures.

The paper is:

Tewksbury, B. J., H. P. Hogan, S. A. Kattenhorn,
C. J. Mehrtens, and E. A. Tarabees, 2014, Polygonal
faults in chalk: Insights from extensive exposures
of the Khoman Formation, Western Desert, Egypt.
Geology. First published online April 15, 2014, doi: 10.1130/G35362.1
http://geology.gsapubs.org/content/early/2014/04/14/G35362.1

Pictures of these circular features can also be found in:

Geological Society of America Data Deposity no
2014165 (Tewksbury et al. Polygonal faults in chalk:
insights from extensive exposures of the Khoman
Formation, Western Desert, Egypt) PDF file at:
ftp://rock.geosociety.org/pub/reposit/2014/2014165.pdf

Additional links about paper:

Tewksbury Publishes Article in Geology
by Vige Barrie, Hamilton, April 28, 2014
http://www.hamilton.edu/news/story/tewksbury-publishes-article-in-geology
sit/2014/2014165.pd

Yours,

Paul H.

American Geophysical Union Makes Many Older Journal Papers Open Access

American Geophysical Union Makes Many Older Journal Papers Open Access

A ton of 2+ year-old AGU journal articles are now open access!
by Chris Rowan, Highly AllochthonousMay 7, 2014
http://all-geo.org/highlyallochthonous/2014/05/a-ton-of-2-year-old-agu-journal-articles-are-now-open-access/

American Geophysical Union to make many older
journal articles freely available online, press release.
http://news.agu.org/press-release/valuable-earth-and-space-science-research-now-more-accessible-to-the-public/

"The American Geophysical Union (AGU) and Wiley today
announced that, starting 1 May, all AGU journal content from
1997 to content published 24 months ago will be made freely
available."

Yours,

Paul H.

Looking for Terrestrial Precambrian Life in Death Valley, California

Looking for Terrestrial Precambrian Life in Death Valley, California

Early Life in Death Valley by Peter Byrne
Quanta Magazine, April 24, 2014
http://www.simonsfoundation.org/quanta/20140424-early-life-in-death-valley/
http://www.scientificamerican.com/article/death-valleys-first-life-came-in-by-land-not-by-sea/

Yours,

Paul H.

Early Life In Death Valley, California - Precambrian Life Preserved In Karst

Early Life In Death Valley, California - Precambrian Life Preserved In Karst

Early Life in Death Valley by Peter Byrne
Quanta Magazine, April 24, 2014
http://www.simonsfoundation.org/quanta/20140424-early-life-in-death-valley/

Yours,

Paul H.

Commentary On Commercial Fossil Collecting

Commentary On Commercial Fossil Collecting

Larson, P L., and D. Russell, 2014, The benefits of
commercial fossil sales to 21st-century paleontology.
Palaeontologia Electronica. vol. 17, no. 1, Article
number: 17.1.2E (April 2014)
http://palaeo-electronica.org/content/2014/739-commentary-benefits-of-fossil-sales
PDF version - http://palaeo-electronica.org/content/pdfs/commentary_benefit.pdf

An earlier commentary is:

Shimada, K., P. J. Currie, E. Scott, and S. S. Sumida,
2014, The greatest challenge to 21st century
paleontology: When commercialization of fossils
threatens the science. Palaeontologia Electronica
vol. 17, no. 1, Article number: 17.1.1E, 4 p;
http://palaeo-electronica.org/content/2014/691-great-threat-in-21st-century
PDF version - http://palaeo-electronica.org/content/pdfs/comment_threat.pdf

Also, there is:

Plotnick, R., 2008, Out of the Mainstream: Heated
Discussions and Strong Opinions. Palaeontologia
Electronica. vol. 11, no. 2,
http://palaeo-electronica.org/2008_2/commentary/comment.htm

Future Research Directions in Paleontology
Report of a Workshop Held April 8-9, 2006
Sponsored by the National Science Foundation
http://paleosoc.org/FRDP-Brochure.pdf

None of the above papers and web pages do not
necessarily express my opinions on this subject.
Any comments about them should be addressed
to the authors of the papers and web pages.

Yours,

Paul H.

Geological Study Explains Mystery of Australian Opal Field

Geological Study Explains Mystery of Australian Opal Field

Geological Study Explains Mystery of Australian
Opal Fields by Natali Anderson, Jun 5, 2013
http://www.sci-news.com/geology/article01128-australia-opal.html

Uncovered: the truth about opal formation by
Amy Middleton, Australian geographci, May 31, 2013
http://www.australiangeographic.com.au/news/2013/05/uncovered-the-truth-about-opal-formation/

The paper is:

P. F. Rey, 2013, Opalisation of the Great Artesian
Basin (central Australia): an Australian story with a
Martian twist. Australian Journal of Earth Sciences:
An International Geoscience Journal of the Geological
Society of Australia. vol. 60, no. 3, pp. 291-314
DOI: 10.1080/08120099.2013.784219
http://www.tandfonline.com/doi/full/10.1080/08120099.2013.784219
http://adsabs.harvard.edu/abs/2013AuJES..60..291R

PDF file at
http://earthbyte.org/Resources/Pdf/Rey_Opals_AJES_2013.pdf

Yours,

Paul H.