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A more recent theory combining both Deccan volcanism and the impact hypothesis has been developed by teams at UC Berkeley led by Paul Renne and Mark Richards. This theory proposes that the impact itself instigated the most intense period of Deccan eruptions, both of which had devastating effects contributing to the K-Pg extinction.
[12] [13] The impact hypothesis, also known as the Alvarez hypothesis, was bolstered by the discovery of the 180 km (112 mi) Chicxulub crater in the Gulf of Mexico's Yucatán Peninsula in the early 1990s, [14] which provided conclusive evidence that the K–Pg boundary clay represented debris from an asteroid impact. [8]
Researchers find evidence that the carbon dioxide concentration in the oceans rose before the asteroid impact that caused the extinction of non-avian dinosaurs. This was likely caused by long-term volcanic eruptions from the Deccan Traps and acidified the oceans already before the asteroid impact.
However, the most widely accepted theory for the mass extinction is that an asteroid (or, perhaps a comet) at least 10 kilometers in diameter crashed near modern-day Chicxulub on the Yucatán ...
Researchers at University New South Wales (UNSW) believe they’ve found evidence that an asteroid impact buried near the town of Deniliquin, Australia, is the world’s largest ever discovered ...
Soil studied by India’s Chandrayaan-3 mission near the lunar south pole adds support to the theory that the ... evidence that supports a theory ... an asteroid impact created the basin about 4.2 ...
In 2021, evidence for a probable impact 3.46 billion-years ago at Pilbara Craton has been found in the form of a 150 kilometres (93 mi) crater created by the impact of a 10 kilometres (6.2 mi) asteroid (named "The Apex Asteroid") into the sea at a depth of 2.5 kilometres (1.6 mi) (near the site of Marble Bar, Western Australia). [52]
The asteroid that killed most dinosaurs 66 million years ago left behind traces of its own origin.. Researchers think they know where the Chicxulub impactor came from based on levels of ruthenium ...