In 2016, a report on further analysis of Younger Dryas boundary sediments at nine sites found no evidence of an extraterrestrial impact at the Younger Dryas boundary. Also that year, an analysis of nanodiamond evidence failed to uncover lonsdaleite or a spike in nanodiamond concentration at the YDB. See more The Younger Dryas impact hypothesis (YDIH) or Clovis comet hypothesis is a speculative attempt to explain the onset of the Younger Dryas (YD) as an alternative to the long-standing and widely accepted cause due to a … See more Proponents believe that certain microscopic debris is evidence of impact and that "black mats" of sediment are evidence of … See more In 2001, Richard Firestone and William Topping published their first version of the YDIH, "Terrestrial Evidence of a Nuclear Catastrophe in … See more The impact hypothesis has been the subject of documentaries, including Mammoth Mystery on National Geographic Explorer (2007), Journey to 10,000 BC on the History Channel (2008), Survival Earth on Channel 4 (2008), and Megabeasts' Sudden Death on See more Members of this group have been criticized for promoting pseudoscience, pseudoarchaeology, and pseudohistory, engaging in cherry-picking of data based on confirmation bias, … See more A number of other hypotheses have been put forward about the cause of the Younger Dryas climate event. Mainstream explanation The most widely accepted is that it began because of a significant reduction or shutdown of the North Atlantic "Conveyor" See more • Carolina bays – Elliptical depressions concentrated along the Atlantic seaboard of North America • Murray Springs Clovis Site – Archaeological site in Arizona, United States See more WebMar 28, 2024 · The Hiawatha impact most likely occurred, prior to the onset of the final Pleistocene glacial stage, possibly during the Eemian interglactial stage, more likely in an earlier warm interglacial stage. So, while it is young, geologically speaking, the Hiawatha impact predated the Younger Dryas, most likely before the Last Glacial Maximum.

Impact Structure Hidden Under Arctic Ice Dates to the Paleocene

WebNov 14, 2024 · If confirmed, its dating could establish the Younger Dryas impact hypothesis as fact. It’s a somewhat controversial idea that a large impact in North America some 11,000 to 13,000 years ago ... WebJun 18, 2012 · The textures and morphology of Younger Dryas spherules correspond to those observed in known impact events, such as the 65-million-year-old Cretaceous–Paleogene impact, the Tunguska airburst in 1908, and the 50,000-year-old Meteor Crater impact. porthmouth fire live radio

A newly found crater in Greenland is one of Earth

WebJul 5, 2024 · It is thought that the comet strike — known as the Younger Dryas impact — also wiped out many large animal species and ushered in a mini ice age that lasted more than 1,000 years. Archaeological site in Arizona, U.S., with a distinctive black layer, indicating substantial environmental changes beginning about 10,800 BC, with impact … WebJun 30, 2024 · The impact energy has been inferred from seismic records at the time of the explosive event as well as computer simulations of the air burst and resulting damage on the ground. At around 5 to 15 megatons … WebThe impactor was most likely an asteroid or comet greater than several hundred meters in diameter with maximum size unknown, but probably less than several kilometers in diameter. ... JS Pigati, et al., Accumulation of impact markers in desert wetlands and implications for the Younger Dryas impact hypothesis. Proc Natl Acad Sci USA 109, … porthmissen car park charges