At https://phys.org/news/2025-08-ocean-sediments-theory-comet-impact.html …. Fe rich and silica rich impact microspherules, as well as interstellar dust particles, interpreted as cometary dust, have been found in sediment cores in Baffin Bay in northern Canada, to the west of Greenland. These may be clues to the idea Earth interacted with a disintegrating comet, or a shedding comet. Giving rise to the Younger Dryas climate anomaly. The latter is a rather lengthy period and one may suspect other factors were at play in order for it to last 1400 years, or thereabouts. The length of the period is contrary to the cometary dust theory – and to the idea the cold episode was inaugurated by a pulse of cold fresh glacial water. One other idea is that electro-magnetic effects caused the Earth’s dipole to rock – and led to a lengthy wobble at the axis of rotation. Wobbles are an accepted form of occurrence but little research has been done on what might activate them. The discovery of a strong electro-magnetic force within the solar system suggests this should become a priority at some point in time. The Earth’s dipole is perfectly capable of rocking, I am assuming. This affects the magnetic poles.
Be that as it may the article is in the online journal PLOS One and is strictly mainstream in nature. It avoids upsetting the applecart and concentrates on what is found in the ocean sediments. A link to the article can be found at the PhysOrg news piece above. It was authored by a team from the University of South Carolina. The theme of the article is in keeping with the idea the Earth passed through a dense train of meteoric material shed from a comet – possibly in the process of disintegrating. This can of course happen at any time, if and when a largish comet disintegrates as it rounds the Sun. Critics of the comet theory have often pointed to a lack of evidence in ocean sediments. This inspired Christopher Moore to have another look – on the seafloor of Baffin Bay. Dr Vladimir Trelmovich added, the collision of the Earth with comets led to catastrophes leading to climate change – and to the death of civilisations. Presumably he means the Neolithic and Bronze Ages. The Younger Dryas took place earlier than any of them, as he then refers to the event at 12,800 years ago = the Younger Dryas.
Having stated in fine detail the microscopic evidence of this disaster found in multiple traces of cometary matter, identified by the morphology and composition of the microparticles found in the seddiment core, adds to what has been found across the northern hemisphere on land. The scale of cometary or meteoric dust in the atmosphere, he said, was enough to cause an ‘impact winter’ – otherwise known as a cosmic winter episode. It was followed by a 1400 year cool period – but he does not elaborate on how a stream of cometary material could induce such a lengthy period. That is the part of the theory that is currently missing.
As many of the earlier researchers into the Younger Dryas boundary event have moved over to a new journal devoted to cometary fragmentation events and meteors in general, this article in a recognised mainstream journal is interesting as it suggests that in spite of efforts to bury catastrophic ideas more and more people are shifting from mainstream circling of the wagons to taking the idea seriously. It is to be welcomed, as suppressing ideas is not really very scientific. See also https://dailygalaxy.com/2025/08/12800-year-comet-explosion-ocean-sediment/ …