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Sunday, 13 September 2009

Younger Dryas Impact hypothesis GSA and AGU Abstracts

Younger Dryas Impact hypothesis GSA and AGU Abstracts

Paul bristolia at
Sun Sep 13 07:59:56 EDT 2009

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

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

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

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.

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

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

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:

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

According to George Howard, ,
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.


Paul H.

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