Crackpot YD Impact Hypothesis Gets a Whack

CBS News

Scientists: Earth Catastrophic Meteor Theory Wrong

CBS News
About 12900 years ago, a very large meteor hurtling through space either slammed into the Earth or exploded in in the atmosphere, obliterating most of North ...

Meteor/Meteorite News- YD Mammoth Demise 20NOV09

from Google News: Dung dating illuminates mammoth mystery Nature.com (subscription) - ‎12 分前‎ The disappearance of the huge herbivores that once roamed North America triggered a massive change in the environment with new trees and more fires. ... Scientists zero in on reason for mammoths' demise Los Angeles Times - ‎2 時間前‎ The sediment beneath an Indiana lake is providing clues. One thing is clear: A meteor didn't kill off the mammoths, mastodons and other large plant-eaters, ... Mammoths not killed by human spears ABC Online - ‎5 時間前‎ By Madeleine Genner for The World Today They were some of the biggest mammals to walk the earth but it seems woolly mammoths were not killed off by humans ... New Data Shed Light on Large-Animal Extinction New York Times - ‎17 時間前‎ By NICHOLAS WADE Whenever modern humans reached a new continent in the expansion from their African homeland 50000 years ago, whether Australia, ... Dung helps reveal why mammoths died out BBC News - ‎17 時間前‎ By Victoria Gill Mammoth dung has proved to be a source of prehistoric information, helping scientists unravel the mystery of what caused the great mammals ... Extinction of giant mammals altered landscape msnbc.com - ‎17 時間前‎ By Jeanna Bryner The last breaths of mammoths and mastodons some 13000 years ago have garnered plenty of research and just as much debate. ... Dung Fungus Provides New Evidence in Mammoth Extinction Wired News - ‎18 時間前‎ By Betsy Mason The latest evidence in the disappearance of the mammoths, and nine other North American species weighing over a ton, comes from fossilized ... After Mastodons and Mammoths, a Transformed Landscape Science Daily (press release) - ‎19 時間前‎ ScienceDaily (Nov. 20, 2009) — Roughly 15000 years ago, at the end of the last ice age, North America's vast assemblage of large animals -- including such ... Sophisticated hunters not to blame for driving mammoths to extinction guardian.co.uk - ‎20 時間前‎ Giant animals such as the woolly mammoth were already facing extinction by the time humans had developed more lethal weapons. Photograph: Corbis/Royal BC ... Spores in Mastodon Dung Suggest Humans Didn't Kill Off Ancient Mammals Discover Magazine - ‎2 時間前‎ A fungus found within ancient mammoth dung is providing scientists with clues about how the large ancient mammals collectively known as megafauna went ... Mammoths weren't killed off by meteor TG Daily - ‎5 時間前‎ By Emma Woollacott Friday, 20 November 2009 04:55 A new study into the North American landscape 15000 years ago has debunked several theories about why ... Study Provides Insight into Extinction Of Large Animals The Money Times - ‎8 時間前‎ At the University of Wisconsin-Madison, Scientists have advanced towards solving the mystery of extinction of mammoths, mastodons, and other large animal ... Poop evidence exonerates humans in mammoth mystery World Science - ‎13 時間前‎ The question of how huge animals like the mammoth, mastodon, and ground sloth went extinct—and how their disappearance from North America affected ... Blame the Mammoths Journal Watch - ‎18 時間前‎ With the help of a dung fungus, scientists have figured out that the disappearance of mammoths, mastodons, and other large animals likely caused dramatic ... UW scientists creep closer to solving mystery of mammoths' extinction Milwaukee Journal Sentinel - ‎19 時間前‎ By Mark Johnson of the Journal Sentinel Scientists at the University of Wisconsin have taken an important step toward solving the mystery of what wiped out ... Was there a Stone Age apocalypse or not? New Scientist - ‎19 時間前‎ Was there a Stone Age apocalypse or not? One narrative has it that about 13000 years ago a comet blasted North America , wiping out the continent's ...

Asteroid Impact News- Younger Dryas Impact hypothesis 13OCT09

Younger Dryas Impact hypothesis GSA and AGU Abstracts

The GSA abstracts can be found in "T94. Impact Cratering
from the Microscopic to the Planetary Scale II (GSA
Planetary Geology Division; International Continental
Scientific Drilling Program [ICDP]; GSA Sedimentary
Geology Division; GSA Structural Geology and Tectonics
Division; GSA Geophysics Division; Paleontological
Society; GSA International Division) at

http://gsa.confex.com/gsa/2009AM/finalprogram/session_25177.htm

The abstracts are;

1. Dryas. Pinter, N., A. C. Andrew, and D. Ebel, 2009,
Extraterrestrial and Terrestrial Signatures at the Onset of
the Younger Geological Society of America Abstracts with
Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_162563.htm

2. Holliday, V. T., and D. J. Meltzer, 2009, Geoarchaeology
of the 12.9ka Impact hypothesis. Geological Society of
America Abstracts with Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_160959.htm

3. Paquay, F., S. Goderis, G. Ravizza, and P. Claeys, 2009, No
evidence of of extraterrestrial geochemical components at the
Bolling-Allerod/Younger Dryas Transition. Geological Society
of America Abstracts with Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_163154.htm

4. Surovell, T. A., and V. T. Holliday, 2009, Non-
Reproducibility of Younger Dryas Extraterrestrial Impact
Results. Geological Society of America Abstracts with
Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_163912.htm

PDF files of various papers by Dr. V. T. Holliday can be
found beneath "Publications of Vance T. Holliday" at:

http://www.argonaut.arizona.edu/holliday.htm

This includes:

Vance T. Holliday, David A. Kring, James H. Mayer, and Ronald J.
Goble, Age and effects of the Odessa meteorite impact, western Texas,
USA. Geology. vol. 33, pp. 945-947. at:

http://www.argonaut.arizona.edu/articles/holliday_etal2005.pdf

The Abstracts to the 2009 American Geophysical Union
presentations for "PP15: Younger Dryas Boundary:
Extraterrestrial Impact or Not?" have not been posted
yet. Eventually, they should appear at

http://www.agu.org/meetings/fm09/program/scientific_session_search.php?show=detail&sessid=388

According to George Howard, http://www.georgehoward.net/clovis_comet_at_fall_2009_agu.htm

,
the titles of the accepted papers are:

1. Lost Impacts

2. High resolution Osmium isotopes in deep-sea
ferromanganese crusts reveal a large meteorite impact
in the Central Pacific at 12.4 ka

3. What Caused the Younger Dryas? An Assessment of
Existing Hypotheses

4. An Independent Evaluation of the Younger Dryas
Extraterrestrial Impact Hypothesis

5. Cosmic impact: What are the odds?

6. Cometary airbursts and atmospheric chemistry:
Tunguska and a candidate Younger Dryas event

7. Problems with the Younger Dryas Boundary ( YDB )
Impact Hypothesis

8. Beringian Megafaunal Extinctions at ~37 ka B.P.:
Do Micrometeorites Embedded in Fossil Tusks and
Skulls Indicate an Extraterrestial Precursor to
the Younger Dryas Event?

9. Airbursts in the Sky with Diamonds? Shock
Limits to a Younger Dryas Impact.

10. The platinum group metals in Younger Dryas
Horizons are terrestrial

11. Putting the Younger Dryas Cold Event into Context

12. Field-Analytical approach of land-sea records
for elucidating the Younger Dryas Boundary syndrome

13 Evidence of four prehistoric supernovae <250
parsecs from Earth during the past 50,000 years

14. Oblique impacts into low impedance layers

15. Cold Climate Related Structural Sinks Accommodate
Unusual Soil Constituents, Pinelands National Reserve,
New Jersey, USA.

16. Positive anomaly in platinum group elements and
the presence of shocked diamonds: Two question marks
at the Younger Dryas

17. Nanodiamonds and Carbon Spherules from Tunguska,
the K/T Boundary, and the Younger Dryas Boundary Layer

18. Are Nanodiamonds Evidence for a Younger Dryas
Impact Event?

19. Rockyhock and Kimbel Carolina Bays: Extraterrestrial
Impact or Terrestrial Genesis?

20. No support from osmium isotopes for an impact event
at the Bolling-Allerod/Younger Dryas transition

21. Climatic Control of Biomass Burning During the Last
Glacial-Interglacial Transition

22. Human Population Decline in North America during
the Younger Dryas

23. Summary of impact markers and potential impact
mechanisms for the YDB impact event at 12.9 ka

24. Testing Younger Dryas ET Impact ( YDB ) Evidence
at Hall’s Cave, Texas

25. Wildfires, Soot and Fullerenes in the 12,900 ka
Younger Dryas boundary layer in North America.

Obviously, the discussion about the Younger Dryas Impact Hypothesis continues.


Source Paul H., USA

Latest Worldwide Meteor/Meteorite News- Chinese Sword, Tunguska, Space Diamonds, PA Meteor Photo 23JUL09

More evidence found that a comet smashed into Canada

Kelowna.com - ‎

“These diamonds have only been found thus far in meteorites and impact craters on Earth and appear to be the strongest indicator yet of a significant cosmic ...

A century later scientists still at odds on Tunguska Event explanation

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More than 100 years have passed since the Tunguska Meteorite Event and the mystery of its occurrence remains unsolved, but scientists have not given up on ...

Ancient Chinese Sword Reveals Origins of the Mysterious Sanxingdui

PR Newswire (press release) - ‎

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Astronomer Photographs Meteor Through Telescope

Slashdot - ‎

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Meteorite Impact News- Younger Dryas Again 20JUL09

California's Channel Islands hold evidence of Clovis-age comets

EurekAlert (press release) - ‎1 hour ago‎

"These diamonds have only been found thus far in meteorites and impact craters on Earth and appear to be the strongest indicator yet of a significant cosmic ... (more)

Scientific American

Did a Comet Cause a North American Die-Off around 13000 Years Ago?

Scientific American - Brendan Borrell - ‎1 hour ago‎

The controversial theory also gibes with the 1908 Tunguska atmospheric detonation (also thought to be from a comet or meteorite) that leveled trees in ... (more)

Younger Dryas about 12,900 BP PBS Program to Air

PBS Program to Feature Two UMaine Scientists, March 23, 2009
http://www.umaine.edu/news/view_release.php?x=1237809989

Dr. Kennett gave a talk, which included a lot of research that is either being prepared for publication, been submitted for publication, and in press. Dr. Kennett made a very convincing case that something unique, extraordinary, and instantaneous occurred at the beginning of the Younger Dryas about 12,900 B. calender years ago and could be an event that was extraterrestrial in nature. His idea that it involved multiple, simultaneous Tunguska-like events occurring across the North American continent. He also, discussed and showed pictures of the research on the Greenland ice sheet, carried out by Paul Mayewski, and Andrei Kurbatov. Outcropping along the edge of the Greenland Ice Sheetis a well defined Younger Dryas bed, which consists of dark greydusty ice with clean, white Holocene ice above it and clean, white terminal Pleistocene ice below it. They found the nannodiamonds and other alleged impact indicators right at and only at the basal contact of the Younger Dryas ice layer. They found exactly what would be expected for an layer of meteoritic debris from Tunguska-like events.

This is a show that you do not want to miss.It is in the realm of possibility, that decade or so from now, Dr. West, Dr. Kennett, and other members the YDB Group will likely be known as the "Walter Alvarezes of the Quaternary.

I am now getting together with a couple of archaeologists to do some “prospecting” for nannodiamonds and microspherules.

Some relevant publications:

Haynes, V. C., Jr., 2008, Younger Dryas “black mats” and the Rancholabrean termination in North America. Proceedings of the National Academy of Sciences. vol. 105 no. 18 6520-6525
http://www.pnas.org/content/105/18/6520.abstract

Did a Significant Cool Spell Mark the Demise of Megafauna?http://uanews.org/node/19409
Kennett, J.D., J.P. Kennett, G.J. West, J.M. Erlandson, J.R. Johnson, I.L. Hendy, A. West, B.J. Culleton, T.L. Jones and Thomas W. Stafford Jr., 2008, Quaternary Science Reviews.vol. 27, no. 27-28, pp. 2530-2545.

http://dx.doi.org/10.1016/j.quascirev.2008.09.006
Kennett, D.J., J. P. Kennett, A. West, C. Mercer, S. S. Que Hee, and L. Bement, 2009, Nanodiamonds in the Younger Dryas Boundary Sediment Layer. Science. vol. 323, no. 5910, p. 94.

http://www.sciencemag.org/cgi/content/abstract/323/5910/94

Written by Paul H