Exploring abrupt climate change induced by comets and asteroids during human history

Alpine Younger Dryas Impact evidence

Senior soil scientist Bill Mahaney nails YDI in glacial sediments

Mahaney finds Black Mat in Venezuela (2009) and (2012)

Bonus paper:  Premature rejection in science: The case of the Younger Dryas Impact Hypothesis

A masterful and comprehensive effort here from Comet Research Group co-author, Bill Mahaney. Much of the discipline-specific text is hard for the Tusk to fully grasp, and I have had no time to properly review, but I have asked Bill to provide a layman’s summary of the approach and conclusions. I hope to post this soon.

Mount Viso (3841 m asl), one of the highest mountains in the Western European Alps carries not only a glacial record following the end of the last glacial (Late Glacial-LG), but also a cosmic airburst record at approximately ~ 12.8 ka, presumably the black mat, that adds to a worldwide record of biomass burning which is considered to have triggered the Younger Dryas (YD) cooling episode. We combine the stratigraphic evidence of staggered Late Glacial retreat on both sides of the continental divide—faster in the upper Guil, possibly slower in the upper Po valleys—followed by superposed YD moraine overlapping LG in France, and stillstand of LG with overlapping YD in Italia with recovered cosmic evidence. Previously, we studied selected areas on the Viso massif, but here we expand on newly combined stratigraphic-cosmic airburst evidence, the latter lying in an uneven distribution of welded, melted and air-quenched clasts of pebble to sand-silt size in paleosols, all of which carry variable high to low REEs, high base metals, partial Pt and Ir coated surfaces indicative of nuclear-cosmic events. One of the outstanding conclusions of this research is the indisputable close correspondence of widespread cosmic airburst evidence with the YDB (Younger Dryas boundary) and onset of the YD. Thus, a test of catastrophism, firmly embedded in surficial sediment, yields some important underpinnings of Earth’s climatic history.


Whereas we hypothesize that the theorized cosmic event was caused by an airburst fragment or fragments sourced from Earth’s encounter with the Encke Comet (12.8 ka)(Napier 2010), thereafter exploding over the Mt. Viso area, while others argue that such an encounter could not sustain the cooling event that followed. The Earth/comet impact is thought to have occurred over southern Manitoba, melting part of the Laurentide Ice Sheet in the process, spewing fragments southward in an arc southwest to east–northeast.Other fragmental bodies of the impact continued to encounter Earth as the Taurid meteors. As hypothesized further by Mahaney et al. (2013b), during the YD, − 12.8 ka to ~ 11.6 ka, the meteor swarm was possibly of sufficient mass to maintain positive glacial mass balances in various alpine localities in North and South America and in the Alps, thus sufficient to sustain the YD glacial resurgence linked to the main cosmic event. Whether the YD cooling event was caused conclusively by one or the other—the thermohaline circulation or the widespread fragmental explosions— the upshot is that the YD is firmly documented by palynological and geological evidence on a worldwide basis. The marine argument by itself does not explain the worldwide YD effect, but it does reinforce regional cooling and augment intercontinental cooling imposed by instantaneous
fragmental airbursts.


Many geologists, infused with the notion of uniformitarianism, as proposed by Lyell (1830), are reluctant to entertain a possible catastrophic mechanism for the YD (Kennett et al. 2007), that is, a cosmic event to explain changes in the earth-atmosphere system such that solar-induced warming might be offset for nearly 1300–1400 years by the YD glacial advance. As discovered by palynologists decades ago, a drastic change in the distribution of a widespread cold-loving alpine wildflower, a member of the rose family—Dryas octapetala—causing it to expand its area of coverage, thus increasing for a time its pollen count in retrieved cores, lent its name to the Late Pleistocene YD climatic episode. Because the Mt. Viso Massif, one of the highest areas in the Western Alps, is surrounded by valley glaciers that responded to off-again, on-again rapid changes in snow balance at the end of the ice age (Würm in the Alps, Pinedale in the Rocky Mountains; Liki on Mt. Kenya), it is an obvious laboratory in which to study the YD in relation to earlier warming (LG) and late Holocene cooling (LIA).

Dr. William Mahaney, International Journal of Earth Sciences, September 2, 2022

6 Responses

  1. That was a splendid interview you participated in with Matthew Loehmier that I watched recently George…… Thomas Kuhns ‘ The Structure of Scientific Revolutions was a pertinent discussion topic …. Yes there are some awful throwbacks to the Inquisition – metaphorically speaking – that want the Younger Dryas Impact Hypothesis and Mike Baillie’s research into the fourteenth century climate trauma and Black Death suppressed …

  2. Mr. Hamish, I’m not convinced the throwbacks to that unpleasantness are particularly metaphorical. Seems there is a contingent of alleged scholars who regard the Younger Dryas Impact Hypothesis as a direct aggression targeting their blissful retirement funding, their status as revered Geniuses of the Age, and all the simpering Climate Catastrophe Groupies they hope to meet at each stop of their Book Tours.
    On the other hand, What if all the groupies are just like Greta?

  3. You need to read Allan, D. S.. Cataclysm!: Compelling Evidence of a Cosmic Catastrophe in 9500 B.C. (p. 362). Inner Traditions/Bear & Company. These authors have assembled a mountain of evidence pointing directly to a worldwide catastrophe around 9500 B.C. They draw upon a vast range of sciences and disciplines to weave their story. And it is a compelling account that begins beyond our solar system, about 13,000 years ago, with the explosion of the Vela Supernova.

  4. I’m working on a new energy discovery Antihydrogen fusion that creates atmospheric sprites. Antihydrogen fusion is a twelve foot ringed disc consisting of Antihydrogen fusion wrapped in antihelium and liquid oxygen and antihelium. The disc drops from our invisible plasma tubes surrounding the planet releasing atomic oxygen that builds up in earths lower ionosphere. When the saturation points are reached the massive release floods the planet (flooding the planet 98 ft. Per episode) creates mini-icecaps. But the catalyst for earths cataclysmic event’s. Atomic oxygen https://www.nature.com/articles/s43247-020-00084-5?utm_source=commsenv_etoc&utm_medium=email&utm_campaign=toc_43247_2_1&utm_content=20210222&WT.ec_id=COMMSENV-202102&sap-outbound-id=0C7D7087E354B0D3625C575C8E3D82BD30388DFF

  5. I wish somebody capable like this would visit the Iturralde Crater (also called Araona Crater) so that we can settle this matter once and for all to shut down the haters who claim If you have contacts please send them there to narrow the date as it’s currently listed as 10k to 30k years old. 🙂

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