( A) Approaching 12-km-sized impactor over the preimpact target of the Yucatán peninsula. The figure includes 2 perspectives: a westerly oriented radial profile crossing inner crater rim and shallow shelf and a northeasterly oriented radial profile that crosses the opening in crater rim into the Gulf of Mexico. Key events within the first day of the Cenozoic based on numerical modeling, geophysical data, and IODP Expedition 364 drilling. 2), but some melt drapes and covers the peak ring and extends into the annular trough ( 7– 9).įig. The main mass of this melt ends up inside the peak ring, forming the central impact melt sheet ( Fig. 2 A and B) and lined with impact melt ( 5). Within tens of seconds of the impact, a ∼40- to 50-km-radius transient cavity was formed ( Fig. These results support the dynamic collapse model for peak ring formation ( 5), in which rocks temporarily flow like a viscous fluid, moving inward and upward to form a zone of central uplift and then, collapse outward and downward to form a peak ring ( 6). Drill core showed that the bulk of the Chicxulub peak ring was formed from uplifted, fractured, and shocked granitic rocks with unusually low density and seismic velocity cross-cut by magmatic sheet intrusions and shear zones ( 2, 4). 1) during International Ocean Discovery Program (IODP)–International Continental Scientific Drilling Program (ICDP) Expedition 364 ( 2, 3). In 2016, a peak ring was drilled for the first time at the ∼200-km-diameter Chicxulub impact structure ( Fig. The largest impact structures-peak ring craters and multiring impact basins-exhibit annular rings of elevated topography surrounding their centers called peak rings. Impacts of asteroids and comets are a dominant geologic process on rocky planets ( 1). The high-resolution section provides insight into the impact environmental effects, including charcoal as evidence for impact-induced wildfires and a paucity of sulfur-rich evaporites from the target supporting rapid global cooling and darkness as extinction mechanisms. Generation of a deep crater open to the ocean allowed rapid flooding and sediment accumulation rates among the highest known in the geologic record. Within a day, the reflected rim-wave tsunami reached the crater, depositing a cross-bedded sand-to-fine gravel layer enriched in polycyclic aromatic hydrocarbons overlain by charcoal fragments. Within hours, the full resurge deposit formed through settling and seiches, resulting in an 80-m-thick fining-upward, sorted suevite in the flooded crater. Within an hour, resurge crested the peak ring, depositing a 10-m-thick layer of suevite with increased particle roundness and sorting. Within tens of minutes, the peak ring was covered in ∼40 m of brecciated impact melt rock and coarse-grained suevite, including clasts possibly generated by melt–water interactions during ocean resurge. Within minutes of the impact, centrally uplifted basement rock collapsed outward to form a peak ring capped in melt rock. We present an interpreted series of events based on analyses of these drill cores. Site M0077 includes ∼130 m of impact melt rock and suevite deposited the first day of the Cenozoic covered by <1 m of micrite-rich carbonate deposited over subsequent weeks to years. ‘Radiation House: The Movie’ opens across Japan on April 29, 2022.Highly expanded Cretaceous–Paleogene (K-Pg) boundary section from the Chicxulub peak ring, recovered by International Ocean Discovery Program (IODP)–International Continental Scientific Drilling Program (ICDP) Expedition 364, provides an unprecedented window into the immediate aftermath of the impact. But when a massive typhoon hits, she turns to her old hospital for help. After arriving on the island, her father soon passes away so Amakasu decides to stay and assist at the clinic. However, when Amakasu learns that her father, the only practising doctor at a small clinic on a remote island, is in a serious condition she puts her plans on hold. An Amakasu (Tsubasa Honda), whom he loves, has decided to travel abroad to study at Washington Medical University. Synopsis: Iori Igarashi (Masataka Kubota) is a radiographer at a general hospital who has been feeling depressed. The cast includes Masataka Kubota, Tsubasa Honda, Alice Hirose, Kenta Hamano, and Tomomi Maruyama. ‘Radiation House: The Movie’ (劇場版ラジエーションハウス) is a 2022 Japanese medical drama directed by Masayuki Suzuki.īased on the manga by Tomohiro Yokomaku and Taishi Mori, the film is a continuation of the TV series that finds Amakasu travelling to a remote island after she learns that her father is seriously ill.
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