The Chicxulub impact--What happened on the opposite side of …
2011年10月24日 · A number of researchers have asked "what happened on the side of the earth opposite the place where the meteorite hit in the Yucatan (Mexico) 65 million years ago?" This point is called the "antipode." The earth is a sphere, and acts like a lens to focus seismic waves on the opposite side of the planet.
Did dinosaur-killing asteroid trigger largest lava flows on Earth?
2015年4月30日 · The “antipodal focusing” theory died when the impact crater, called Chicxulub, was found off the Yucatán coast of Mexico, which is about 5,000 kilometers from the antipode of the Deccan traps. Flood basalts
Antipodal focusing of seismic waves due to large meteorite impacts …
2011年10月1日 · We examine focusing of seismic waves at the antipode of large terrestrial meteorite impacts, using the Chicxulub impact as our case study. Numerical simulations are based on a spectral-element method, representing the …
A steeply-inclined trajectory for the Chicxulub impact
2020年5月26日 · The 66 Ma asteroid impact event that formed the Chicxulub crater, Mexico, marks the end of the Mesozoic Era of Earth history and has been attributed as the cause of the contemporaneous mass...
Ruthenium isotopes show the Chicxulub impactor was a ... - Science
2024年8月15日 · An impact at Chicxulub, Mexico, occurred 66 million years ago, producing a global stratigraphic layer that marks the boundary between the Cretaceous and Paleogene periods. That layer contains elevated concentrations of platinum-group elements, including ruthenium. We measured ruthenium isotopes in samples taken from …
Trajectories and distribution of material ejected from the Chicxulub …
2002年8月30日 · As first suggested by Argyle, there is a concentration of debris deposited at the impact antipode, which, in the case of the Chicxulub impact event 65 million years ago, is over the Indian sub-continent and the proto-Indian Ocean.
the Chicxulub impact suggests that the impact could have generated seismic energy densities of order 0.1–1.0 J/m 3 throughout the upper ∼200 km of Earth’s mantle, sufficient to trigger volcanic eruptions worldwide based upon
Impact study: Princeton model shows fallout of a giant …
2011年10月19日 · The Princeton model shows (at left) that the structure of the Earth’s surface at the time of the meteorite impact that caused the Chicxulub crater in Mexico would have placed the Deccan Traps in India far west of the crater’s antipodal point, instead of …
The Chicxulub Asteroid Impact and Mass Extinction at the ... - AAAS
2010年3月5日 · Abstract. The Cretaceous-Paleogene boundary ~65.5 million years ago marks one of the three largest mass extinctions in the past 500 million years. The extinction event coincided with a large asteroid impact at Chicxulub, Mexico, and occurred within the time of Deccan flood basalt volcanism in India.
Chicxulub | Gerta Keller, Professor of Geosciences, Emeritus
Chicxulub - The Non-Smoking Gun. The Impact - Kill Hypothesis. The Cretaceous-Tertiary boundary (KTB) mass extinction is primarily known for the demise of the dinosaurs, the Chicxulub impact, and the frequently rancorous thirty years-old controversy over the cause of …