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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.
Ursula Marvin argued that the asteroid impact explanation for the end-Cretaceous mass extinction was at odds with the idea of uniformitarianism and criticized those who attempt to reconcile the two as engaging in "newspeak". [95] Alvarez and Asaro measured the iridium levels of a 57m span of rock near the K–T boundary at Gubbio once more.
Some critics of the impact theory have put forward that the impact precedes the mass extinction by about 300,000 years and thus was not its cause. [208] [209] However, in a 2013 paper, Paul Renne of the Berkeley Geochronology Center dated the impact at 66.043 ± 0.011 million years ago, based on argon–argon dating.
We knew that an asteroid heralded the end of the age of the dinosaurs. Now researchers say they have discovered a key element in their extinction Scientists believe they have finally uncovered ...
There's plenty of evidence to indicate that a gigantic asteroid likely wiped out the dinosaurs (and many other forms of life) when it smacked into what's now the Gulf of Mexico roughly 65.5 ...
In geology, catastrophism is the theory that the Earth has largely been shaped by sudden, short-lived, violent events, possibly worldwide in scope. [1] This contrasts with uniformitarianism (sometimes called gradualism ), according to which slow incremental changes, such as erosion , brought about all the Earth's geological features.
The impact created a cloud of dust composed of the asteroid itself and the rock it landed on. The dust spread worldwide, blotting out sunlight and lowering temperatures for years , resulting in ...
The Rare Earth hypothesis argues that planets with complex life, like Earth, are exceptionally rare.. In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity, such as sexually reproducing, multicellular organisms on Earth, and subsequently human intelligence, required an improbable combination of astrophysical ...