Abstract
Deep troughs in Lake Superior support the hypothesis of Younger Dryas Boundary (YDB) comet impact 12,900 BP. The impact theory explains the megafauna extinction, a black mat across the Northern hemisphere, nanodiamonds, platinum and iridium, and the enigmatic Carolina Bays (CB). While the CB were thought to predate Clovis cultural remains, but this must now be seen as spurious as the CB occur on Long Island, an LGM terminal moraine & on end-glacial flood plains, according to Allen West. The CB sand rims are exceptionally pure quartz with large phenocrysts, and also they exude hydrogen (H). This suggests origin from deep granitic plutons, the granite typically being over-saturated with silica. When the Russian Kola Peninsula Superdeep Borehole had reached 40,000 ft, H was boiling from the borehole. This H is among volatiles copiously dissolved in the mantle, from the primitive solar nebula. The granite is from the Lake Superior Province. Lakes Superior, Michigan, Huron & Ontario have deep holes, reaching to below sea level. Bathymetry exhibits a ~145 km circular contour in Eastern L. Superior, where deep troughs occur, eroded in breccias infilling impact explosion cavities many kms deep, as much as 15 to 35 km, the comet fragments coming in from the NW, with the holes lined up along the trajectory. This was an oblique impact with an extremely low angle of incidence, so the ejected granite quartz sands ended up in the CB along the Eastern seaboard principally.
Highlights
During the last decade, the late Ice Age cooling event 12,900 yrs ago at the Younger Dryas boundary (YDB), with re-advance of continental ice sheets and megafauna extinction, has received prominent scientific attention, due to a series of publications by Richard Firestone, Lawrence Berkeley Nat
Deep troughs in Lake Superior support the hypothesis of Younger Dryas Boundary (YDB) comet impact 12,900 BP
While the Carolina Bays (CB) were thought to predate Clovis cultural remains, but this must be seen as spurious as the CB occur on Long Island, an Last Glacial Maximum (LGM) terminal moraine & on endglacial flood plains, according to Allen West
Summary
The late Ice Age cooling event 12,900 yrs ago at the Younger Dryas boundary (YDB), with re-advance of continental ice sheets and megafauna extinction (incl. mammoth), has received prominent scientific attention, due to a series of publications by Richard Firestone, Lawrence Berkeley Nat. Since the occasion of the Chelyabinsk meteorite fall that occurred on Feb. 15, 2013, many have been paying attention to cosmic object impacts threatening civilization, regardless of political ideology This leads me to believe the readership of this journal may carry an inherent interest in such matters, linking outer space to our little, usually solitary planet. This is why I am motivated to comment on the YDB cosmic impact hypothesis of Richard Firestone & his team: in the last few months and weeks, I have been very fortunate to learn several key aspects of the YDB events, in part by email exchange with some of the principals who graciously have answered my questions, and helped me to arrive at the new scenario presented in this paper, which I hope will remove any doubts about the YDB comet hypothesis. Here are the reasons and this is what we should believe that it happened
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