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Keyword: chicxulub

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  • Did a Planetary Society citizen scientist help find one of Earth’s biggest impact craters?

    07/03/2017 12:22:01 AM PDT · by LibWhacker · 13 replies
    Planetary Society ^ | 6/12/17 | Jason Davis
    Did a Planetary Society citizen scientist help find one of Earth’s biggest impact craters? About 66 million years ago, a 10-kilometer-wide hunk of rock smashed into Earth near what is now Mexico's Yucatán Peninsula.The impact created a global dust cloud that snuffed out the sunlight, leading to the demise of 80 percent of Earth's plants and animals—including most of the dinosaurs. A 200-kilometer-wide crater buried near the city of Chicxulub is all that's left. It's ground zero for one of the world's most notable extinction events.But throughout Earth's history, there have actually been five major extinction events. The largest of...
  • Asteroid strike made 'instant Himalayas'

    11/18/2016 9:20:25 PM PST · by MtnClimber · 29 replies
    BBC ^ | 18 Nov, 2916 | Jonathan Amos BBC Science Correspondent
    Scientists say they can now describe in detail how the asteroid that wiped out the dinosaurs produced its huge crater. The reconstruction of the event 66 million years ago was made possible by drilling into the remnant bowl and analysing its rocks. These show how the space impactor made the hard surface of the planet slosh back and forth like a fluid. At one stage, a mountain higher than Everest was thrown up before collapsing back into a smaller range of peaks. "And this all happens on the scale of minutes, which is quite amazing," Prof Joanna Morgan from Imperial...
  • The asteroid that killed the dinosaurs almost got us, too

    06/29/2016 10:26:05 PM PDT · by Utilizer · 30 replies
    THE WEEK ^ | June 28, 2016 | Joshua A. Krisch
    The age of the dinosaurs ended 66 million years ago, when an asteroid six miles in diameter crashed into what is now southeastern Mexico. The world went up in flames. Dinosaurs, along with the massive reptiles that ruled the sea and the sky, perished as forest fires raged across the globe, dust blotted out the sun, and Earth experienced intense heat, frigid cooling, and then more heat. Conventional wisdom states that mammalian diversity emerged from the ashes of the mass extinction, ultimately giving rise to our own humble species. But according to a study in the Journal of Evolutionary Biology,...
  • 'Trickle of food' helped deep sea creatures survive asteroid strike that wiped out the dinosaurs

    04/25/2016 9:28:28 PM PDT · by SunkenCiv · 22 replies
    EurekAlert! ^ | Thursday, April 14, 2016 | Cardiff University
    Study of fossil shells solves unanswered question of how deep sea creatures survived asteroid strike during immense upheaval of the world's oceans... Like the dinosaurs themselves, giant marine reptiles, invertebrates and microscopic organisms became extinct after the catastrophic asteroid impact in an immense upheaval of the world's oceans, yet deep sea creatures managed to survive. This has puzzled researchers as it is widely believed that the asteroid impact cut off the food supply in the oceans by destroying free-floating algae and bacteria. However, in a study published in the April issue of the journal Geology, a team led by researchers...
  • Scientists gear up to drill into ‘ground zero’ of the impact that killed the dinosaurs

    03/06/2016 8:35:56 PM PST · by Utilizer · 59 replies
    Science mag online ^ | Mar. 3, 2016 , 2:00 PM | Eric Hand
    This month, a drilling platform will rise in the Gulf of Mexico, but it won’t be aiming for oil. Scientists will try to sink a diamond-tipped bit into the heart of Chicxulub crater—the buried remnant of the asteroid impact 66 million years ago that killed off the dinosaurs, along with most other life on the planet. They hope that the retrieved rock cores will contain clues to how life came back in the wake of the cataclysm, and whether the crater itself could have been a home for novel microbial life. And by drilling into a circular ridge inside the...
  • It's Official: An Asteroid Wiped Out the Dinosaurs

    03/05/2010 5:46:05 AM PST · by jilliane · 96 replies · 1,368+ views
    Reuters ^ | 03/05/2010 | Kate Kelland
    A giant asteroid smashing into Earth is the only plausible explanation for the extinction of the dinosaurs, a global scientific team said on Thursday, hoping to settle a row that has divided experts for decades.
  • It's official: An asteroid wiped out the dinosaurs

    03/04/2010 1:37:39 PM PST · by Free ThinkerNY · 123 replies · 1,893+ views
    Reuters ^ | March 4, 2010
    LONDON (Reuters) - A giant asteroid smashing into Earth is the only plausible explanation for the extinction of the dinosaurs, a global scientific team said on Thursday, hoping to settle a row that has divided experts for decades. A panel of 41 scientists from across the world reviewed 20 years' worth of research to try to confirm the cause of the so-called Cretaceous-Tertiary (KT) extinction, which created a "hellish environment" around 65 million years ago and wiped out more than half of all species on the planet. Scientific opinion was split over whether the extinction was caused by an asteroid...
  • Expert: Volcanoes in Today's India Wiped Out Dinos

    05/07/2009 12:50:26 AM PDT · by nickcarraway · 7 replies · 2,026+ views
    Volcanoes that erupted in India about 65 million years ago were instrumental in the extinction of dinosaurs, according to new research. For the last thirty years scientists have believed a giant meteorite that struck Mexico’s Yucatan Peninsula was responsible for the mass extinction of dinosaurs, the Daily Telegraph reported on Wednesday. But now Gerta Keller, a geologist at Princeton University, New Jersey, says fossilised traces of plants and animals dug out of low lying hills at El Penon in northeast Mexico show this event happened 300,000 years after the dinosaurs disappeared. Keller suggests that the massive volcanic eruptions at the...
  • Bang goes that theory: Dinosaur extinction 'occurred 300,000 years AFTER asteroid impact'

    04/27/2009 4:35:51 PM PDT · by Free ThinkerNY · 16 replies · 1,024+ views
    dailymail.co.uk ^ | April 27, 2009 | Daily Mail Reporter
    The popular theory that dinosaurs were wiped out by an asteroid 65million years ago has been challenged. It was believed the Chicxulub crater in Mexico was the 'smoking gun' of the mass extinction event. Molten droplets from the ancient asteroid impact were found just below the Cretaceous-Tertiary boundary - a geological layer of sediment linked with the extinction. But soil samples from the 112-mile wide crater show the impact predates the disappearance of the dinosaurs by about 300,000 years. The latest research has been published in the Journal of the Geological Society. Study author Professor Gerta Keller from Princeton University...
  • NEW EVIDENCE THAT VOLCANOS KILLED THE DINOSAURS -

    09/15/2003 8:48:14 PM PDT · by UnklGene · 60 replies · 4,705+ views
    Red Nova ^ | September 15, 2003
    September 15, 2003 Could an enormous volcanic eruption have killed the dinosaurs? Cardiff University -- The extinction of the dinosaurs -– thought to be caused by an asteroid impact some 65 million years ago –- was more likely to have been caused by a 'mantle plume' -– a huge volcanic eruption from deep within the earth's mantle, the region between the crust and the core of the earth. This theory, already supported by a significant body of geologists and palaeontologists, is strengthened by new evidence to be presented at an international conference at Cardiff University on 11-12 September. Research by...
  • Dinosaurs' climate shifted too, reports show

    09/25/2006 4:15:43 AM PDT · by Pharmboy · 28 replies · 830+ views
    Indiana University ^ | 23-Sep-2006 | David Bricker
    Caption: IU Bloomington geochemist Simon Brassell (right), Penn State sedimentologist Michael Arthur (middle), and Tohoku Univ. sedimentologist Harumasa Kano (left) inspect an ancient shale aboard the JOIDES Resolution research vessel. BLOOMINGTON, Ind. -- Ancient rocks from the bottom of the Pacific Ocean suggest dramatic climate changes during the dinosaur-dominated Mesozoic Era, a time once thought to have been monotonously hot and humid. In this month's Geology, scientists from Indiana University Bloomington and the Royal Netherlands Institute for Sea Research present new evidence that ocean surface temperatures varied as much as 6 degrees Celsius (about 11 degrees Fahrenheit) during the...
  • Cosmic Collision May Have Created Hawaii

    02/20/2004 7:50:03 PM PST · by Mike Darancette · 32 replies · 228+ views
    SPACE.com ^ | 01 August 2001 | Michael Paine
    It's bad enough when, every few million years, an asteroid rocks our planet. It's worse if the impact triggers regional or global volcanic activity, which is not only hazardous to nearby plants and animals but can choke Earth's atmosphere with deadly gases for months or years. But there's also a possible bright side, like the birth of nice places like Hawaii. For more than three decades, scientists have explored the question of whether an asteroid impact could cause significant volcanic eruptions, hot spots that spring up out of nowhere and create new landforms or rearrange old ones. The process might...
  • Far More Than A Meteor Killed Dinos, Evidence Suggests

    10/25/2006 3:33:16 PM PDT · by blam · 95 replies · 2,818+ views
    Science Daily ^ | 10-24-2006 | GSA
    Source: Geological Society of America Date: October 24, 2006 Far More Than A Meteor Killed Dinos, Evidence Suggests There's growing evidence that the dinosaurs and most their contemporaries were not wiped out by the famed Chicxulub meteor impact, according to a paleontologist who says multiple meteor impacts, massive volcanism in India, and climate changes culminated in the end of the Cretaceous Period. Cottonmouth Creek waterfall over the event deposit with reworked Chicxulub impact spherules. The original Chicxulub ejecta layer was discovered in a yellow clay layer 45 cm below the base of the event deposit. The yellow clay represents a...
  • BIG BANG IN ANTARCTICA -- KILLER CRATER FOUND UNDER ICE

    06/01/2006 2:26:58 PM PDT · by PatrickHenry · 255 replies · 6,436+ views
    Ohio State University ^ | 01 June 2006 | Staff (press release)
    Ancient mega-catastrophe paved way for the dinosaurs, spawned Australian continent. Planetary scientists have found evidence of a meteor impact much larger and earlier than the one that killed the dinosaurs -- an impact that they believe caused the biggest mass extinction in Earth's history.The 300-mile-wide crater lies hidden more than a mile beneath the East Antarctic Ice Sheet. And the gravity measurements that reveal its existence suggest that it could date back about 250 million years -- the time of the Permian-Triassic extinction, when almost all animal life on Earth died out.Its size and location -- in the Wilkes Land...
  • The Deep Roots of Catastrophe

    03/25/2014 7:35:35 AM PDT · by SunkenCiv · 11 replies
    Newswise ^ | University of Utah
    ...disaster is “not imminent,” he adds, “This is the type of mechanism that may generate massive plume eruptions, but on the timescale of 100 million to 200 million years from now. So don’t cancel your cruises.”... Hotspot plume supervolcano eruptions like those during the past 2 million years at Wyoming’s Yellowstone caldera, which covered North America with volcanic ash.Gargantuan flood basalt eruptions that created “large igneous provinces” like the Pacific Northwest’s Columbia River basalts 17 million to 15 million years ago, India’s Deccan Traps some 65 million years ago and the Pacific’s huge Ontong Java Plateau basalts, which buried an...
  • Volcano Theory of Dino Die-Off Gets New Support

    11/07/2007 4:47:01 AM PST · by Renfield · 9 replies · 456+ views
    National Geographic ^ | 11/05/07 | Richard A. Lovett
    A series of gargantuan volcanic eruptions may have ended at nearly the same time that the dinosaurs went extinct, a new study shows. The find bolsters a controversial theory that massive volcanism contributed to the global catastrophe known as the K-T extinction, which wiped out the dinosaurs and many of Earth's other organisms 65 million years ago. Gerta Keller, a Princeton University paleontologist, presented the new research last week at a meeting of the Geological Society of America in Denver, Colorado. She found that underwater portions of the ancient lava flows, known as the Deccan Traps, contained marine fossils only...
  • Volcanic Eruptions, Not Meteor, May Have Killed The Dinosaurs

    10/31/2007 3:08:40 PM PDT · by blam · 25 replies · 232+ views
    Science Daily ^ | 10-30-2007 | Geological Society of America.
    Volcanic Eruptions, Not Meteor, May Have Killed The DinosaursRajahmundry Quarry. Keller's crucial link between the eruption and the mass extinction comes in the form of microscopic marine fossils that are known to have evolved immediately after the mysterious mass extinction event. The same telltale fossilized planktonic foraminifera were found at Rajahmundry near the Bay of Bengal, about 1000 kilometers from the center of the Deccan Traps near Mumbai. (Credit: Photo courtesy Gerta Keller) ScienceDaily (Oct. 30, 2007) — A series of monumental volcanic eruptions in India may have killed the dinosaurs 65 million years ago, not a meteor impact in...
  • Chicxulub Didnt Do It All By Itself

    10/17/2014 11:40:09 AM PDT · by JimSEA · 24 replies
    Geology Times ^ | 10/10/2014 | Staff
    Geoscientists now overwhelmingly agree that a single large asteroid or comet impact, such as Chicxulub in the Yucatan peninsula of Mexico, could not have been the sole cause of the end-Cretaceous mass extinction. Instead, new research in both planetary/space science and multiple earth-science specialties reveals that concomitant volcanic activity and the associated climate and environmental changes were significant contributing factors in four of the five major mass extinctions in Earth history.
  • New, tighter timeline confirms ancient volcanism aligned with dinosaurs' extinction

    12/19/2014 11:42:56 AM PST · by Red Badger · 26 replies
    www.sciencedaily.com ^ | December 18, 2014 | Source: Princeton University
    A definitive geological timeline shows that a series of massive volcanic explosions 66 million years ago spewed enormous amounts of climate-altering gases into the atmosphere immediately before and during the extinction event that claimed Earth's non-avian dinosaurs, according to new research from Princeton University. A primeval volcanic range in western India known as the Deccan Traps, which were once three times larger than France, began its main phase of eruptions roughly 250,000 years before the Cretaceous-Paleogene, or K-Pg, extinction event, the researchers report in the journal Science. For the next 750,000 years, the volcanoes unleashed more than 1.1 million cubic...
  • Earth's Volcanism Linked To Meteorite Impacts

    12/13/2002 8:36:39 AM PST · by blam · 34 replies · 1,459+ views
    New Scientist ^ | 12-13-2002 | Kate Ravilious
    Earth's volcanism linked to meteorite impacts 14:31 13 December 02 Exclusive from New Scientist Print EditionSpace rocks are blamed for violent eruptions (Image: GETTY) Large meteorite impacts may not just throw up huge dust clouds but also punch right through the Earth's crust, triggering gigantic volcanic eruptions. The idea is controversial, but evidence is mounting that the Earth's geology has largely been driven by such events. This would also explain why our planet has so few impact crater remnants. Counting the number of asteroids we see in the sky suggests that over the past 250 million years, Earth should have...