The presence of a possible meteoritic component in the same sediments suggests that an ET event occurred at approximately the same time. However, whether the presence of the meteoritic component is due to a local meteorite impact/airburst or to a much stronger event remains unclear. Anyway, it is quite possible that some short and dramatic event took place just before the onset of the Younger Dryas climate oscillation, but, as was emphasized by Haynes et al. (2010), an understanding of what happened at c. 12.9– 12.8 ka BP requires further research.
Regular readers of the Tusk know we don’t dwell here on modern day cosmic interactions. But that was yesterday. Today a best buddy and long-time co-worker, Worth Creech, came into my office shocked to report….he had actually seen…..a daytime fireball in Raleigh!
Well, I’ll bee. The Tar Heel State had an encounter with the incredible. Worth, and the moms, dads and kids at soccer practice, watched slack jawed as a bolide streaked across our state at the fringe of atmosphere to explode over eastern North Carolina Wednesday afternoon.
It surprised me that the media coverage of the encounter was so relatively light. I had always believed that daytime fireballs result in brief — but intense — local press. The Raleigh Fireball of 2016 was barely noted, demonstrating how uncomfortably common such interactions must be.
Vance Holliday and Todd Surovell published a paper in PLOS One this week. It is unsurprising but again disappointing that these hacks continue their jihad on the YDB hypothesis based on negligent analysis.
It is impossible to characterize a spherule (of cosmic or terrestrial material) as being of impact origin using a tool that is orders of magnitude less sensitive than what is called for and used to produce the previously published data.
It is as if someone double-checked Holliday and Surovell’s own archeological work by bulldozing an adjacent square, rummaging about, and tossing manhandled contrary items onto the balk.
Because those authors did not perform SEM imaging and EDS analyses, it is impossible for them to reach reliable conclusions about what they found. Surovell et al. did not perform SEM imaging or geochemical analyses, and yet, like Pigati et al., asserted that all magnetic spherules are cosmic in origin. Pinter et al. and Haynes et al. did not report the results of their spherule SEM analyses and likewise concluded spherules were of cosmic origin without supporting data. Lacking SEM imaging and/or EDS analyses, the accuracy of their spherule counts and speculations about origin are highly suspect. As an example of this, Pinter et al. reported observing large numbers of framboids and detrital magnetite well outside the YDB and then speculated that most YDB spherules are simply these other particles. Our results and images indicate their claim to be unfounded. There are fundamental and easily observed differences between quench-melted spherules, unmelted detrital magnetite, and authigenic framboids.