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Skeptics of the YDIB hypothesis frequently state that “no one can reproduce the YDIB results” (Kerr, 2010); “nobody has found anything” (Kerr, 2010); there is a “lack of reproducibility of data” (Holliday, 2011); and “unique peaks in concentrations at the YD onset have yet to be reproduced” Pinter (2011). These casual dismissals are hurtful to the investigation, and demonstrably false. That independent researchers have identified materials diagnostic of an event of cosmic proportions at 12.9 before present should not be subject to debate.
To wit, I offer below citations of published research confirming the original findings of Firestone, et. al. in 2007. Note that some of these researchers disagree with an extraterrestrial impact as cause and offered alternate hypotheses, but, in every case, those speculating about causation have not conducted any analytical work to determine if their hypotheses are correct.
INDEPENDENT GROUPS with positive results:
MAGNETIC SPHERULES.
Baker et al. (2008)
Fayek (2008)
Ge et al. (2009, page 1)
Haynes et al. (2010, page 1)
LeCompte et al. (2010)
Mahaney (2010a, page 10)
Wu (2011)
NANODIAMONDS.
Ge et al. (2009, page 1)
Tankersley (2009)
Tian (2010, page 1)
Van Hoesel (2011)
Bement et al. (2011)
IRIDIUM.
Beets et al. (2008, page 1)
Sharma et al. (2009)
Haynes et al. (2010, page 1)
Mahaney (2010a, page 10)
Marshall (2011)
Wu (2011)
CARBON SPHERULES and GLASS-LIKE CARBON (some w/ NANODIAMONDS)
Mahaney (2010a, page 10)
Tian (2010, page 1)
Courty et al. (2010)
Ge et al. (2009, page 1)
Baker et al. (2008, page 1)
Tankersley (2009)
CHARCOAL AND BIOMASS BURNING:
Mahaney et al. (2010b)
Ge et al. (2009)
Courty et al. (2010)
HUMAN AND ANIMAL POPULATION DECLINES.
Schroeder (2009)
Steele (2010)
CRATER or IMPACT.
Higgins, et al. (2011)
REFERENCES.
Baker DW, Miranda PJ, Gibbs KE. (2008) Montana Evidence for Extra-Terrestrial Impact Event That Caused Ice-Age Mammal Die-Off. American Geophysical Union, Spring Meeting 2008, abstract #P41A-05.
Beets C, Sharma M, Kasse K, Bohncke S. (2008) Search for Extraterrestrial Osmium at the Allerod – Younger Dryas Boundary. American Geophysical Union, Fall Meeting 2008, abstract #V53A-2150.
Bement L, Carter BJ, Simms A, Madden A. (2011) The Bull Creek valley stream terraces, buried soils, and paleo-environment during the Younger Dryas in the Oklahoma Panhandle, USA. Paper #1447, XVIII INQUA-Congress, 21-27 July 2011 in Bern, Switzerland.
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