I had an earlier posting that talked about rethinking the Noachian flood from an LDS perspective, changing the timeframe and location of the Noachian events to North America at the end of the last ice age. In that post, I mentioned growing evidence about a major impact event over the North American ice sheet about 13,000 years ago that may have triggered the Lesser Dryas glaciation, the last ice age event before the current warm period.
Here’s another article that pulls together some of the growing evidence of this impact:
Evidence unearthed at more than two dozen sites across North America suggests that an extraterrestrial object exploded in Earth’s atmosphere above Canada about 12,900 years ago, just as the climate was warming at the end of the last ice age. The explosion sparked immense wildfires, devastated North America’s ecosystems and prehistoric cultures, and triggered a millennium-long cold spell, scientists say.
At sites stretching from California to the Carolinas and as far north as Alberta and Saskatchewan—many of which were home to prehistoric people of the Clovis culture—researchers have long noted an enigmatic layer of carbon-rich sediment that was laid down nearly 13 millennia ago. “Clovis artifacts are never found above this black mat,” says Allen West, a geophysicist with Geoscience Consulting in Dewey, Ariz. The layer, typically a few millimeters thick, lies between older, underlying strata that are chock-full of mammoth bones and younger, fossilfree sediments immediately above, he notes…
Heat from the event would have set off wildfires across the continent, the scientists suggest. The heat and shock from the explosion probably broke up portions of the ice sheet smothering eastern Canada at the time, they add. The flood of fresh water into the North Atlantic that resulted would have interrupted ocean currents that bring warmth to the region, and thick clouds of smoke and soot in the air would have intensified cooling across the Northern Hemisphere.
The inferred date of the event matches the beginning of a 1,200-year-long cold spell that geologists call the Younger Dryas, which in its first few decades saw temperatures in the Northern Hemisphere drop as much as 10°C.
The interesting note (as per the excerpt above) is that the Clovis culture of North America, along with much of the megafauna, appears to have disappeared post-impact. Read the whole article (which includes photographs of the charred layer). ..bruce..