: 83–84 Artistic impression of the asteroid slamming into tropical, shallow seas of the sulfur-rich Yucatán Peninsula in what is today Southeast Mexico. Unknown to them, evidence of the crater they were looking for was being presented the same week, and would be largely missed by the scientific community. Recognizing the scope of the work, Lee Hunt and Lee Silver organized a cross-discipline meeting in Snowbird, Utah, in 1981. : 82 There were no known impact craters that were the right age and size, spurring a search for a suitable candidate. Their paper was followed by other reports of similar iridium spikes at the K–Pg boundary across the globe, and sparked wide interest in the cause of the K–Pg extinction over 2,000 papers were published in the 1980s on the topic. The Alvarezes, joined by Frank Asaro and Helen Michel from University of California, Berkeley, published their paper on the iridium anomaly in Science in June 1980. : 1095 The Alvarezes' impact hypothesis was rejected by many paleontologists, who believed that the lack of fossils found close to the K–Pg boundary-the "three-meter problem"-suggested a more gradual die-off of fossil species. At the time, there was no consensus on what caused the Cretaceous–Paleogene extinction and the boundary layer, with theories including a nearby supernova, climate change, or a geomagnetic reversal. It was hypothesized that the iridium was spread into the atmosphere when the impactor was vaporized and settled across Earth's surface among other material thrown up by the impact, producing the layer of iridium-enriched clay. Iridium levels in this layer were as much as 160 times above the background level. The Alvarezes and colleagues reported that it contained an abnormally high concentration of iridium, a chemical element rare on Earth but common in asteroids. The main evidence of such an impact was contained in a thin layer of clay present in the Cretaceous–Paleogene boundary (K–Pg boundary) in Gubbio, Italy. In the late 1970s, geologist Walter Alvarez and his father, Nobel Prize-winning scientist Luis Walter Alvarez, put forth their theory that the Cretaceous–Paleogene extinction was caused by an impact event. It is now widely accepted that the resulting devastation and climate disruption was the cause of the Cretaceous–Paleogene extinction event, a mass extinction of 75% of plant and animal species on Earth, including all non-avian dinosaurs. The date of the impact coincides with the Cretaceous–Paleogene boundary (commonly known as the K–Pg or K–T boundary). Evidence for the crater's impact origin includes shocked quartz, a gravity anomaly, and tektites in surrounding areas. Hildebrand in 1990, Penfield obtained samples that suggested it was an impact feature. Penfield was initially unable to obtain evidence that the geological feature was a crater and gave up his search. The crater was discovered by Antonio Camargo and Glen Penfield, geophysicists who had been looking for petroleum in the Yucatán Peninsula during the late 1970s. It is the second largest confirmed impact structure on Earth, and the only one whose peak ring is intact and directly accessible for scientific research. The crater is estimated to be 180 kilometers (110 miles) in diameter and 20 kilometers (12 miles) in depth. It was formed slightly over 66 million years ago when a large asteroid, about ten kilometers (six miles) in diameter, struck Earth. Its center is offshore, but the crater is named after the onshore community of Chicxulub Pueblo. The Chicxulub crater ( IPA: i) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Subscribe HERE to the FREE Media Play News Daily Newsletter!īonus content includes commentary by director Mimi Leder and visual effects supervisor Scott Farrar “Preparing for the End” “Making An Impact” “Creating the Perfect Traffic Jam” “Parting Thoughts” a photo gallery and trailers.Chicxulub crater (Mexico) Show map of Mexico Directed by Mimi Leder and executive produced by Steven Spielberg, the film stars Robert Duvall, Téa Leoni, Elijah Wood, Vanessa Redgrave, Leelee Sobieski, Blair Underwood, Maximilian Schell and Morgan Freeman.įully remastered and boasting Dolby Vision and HDR-10, the Deep Impact 4K Ultra HD release includes the film on both 4K Ultra HD and on Blu-ray, access to a digital copy of the film, and legacy bonus content including commentary and featurettes delving into the making of the film. The film depicts humanity’s response as a comet hurtles through space on a collision course with Earth. Originally released on May 8, 1998, Deep Impact grossed nearly $350 million worldwide. The disaster film Deep Impact arrives for the first time on 4K Ultra HD May 2 for its 25th anniversary from Paramount Home Entertainment. Deep Impact (Photo courtesy of Paramount) Disaster Film ‘Deep Impact’ Headed to 4K Ultra HD May 2 for 25th Anniversary
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