[Rockhounds] Iridium in undersea crater confirms asteroid wiped out the dinosaurs

[Doug Bank]

I have found geology texts from the 1970s that still did not accept plate tectonics! People are stubborn. 

> On Feb 24, 2021, at 4:37 PM, J Bryan Kramer <codeburner at gmail.com> wrote:
> 
> I watched a lecture about the Washington flood basalts a week ago and was
> interested to observe that the lecturer pinned the dinosaur extinction on
> those volcanos with not one word about Chicxulub. I knew some geologist
> were skeptical when the asteroid theory was announced by some physicists
> but I'm surprised to see the resistance still exists this many years later.
> 
> BK
> 
> ““There exists a law…inborn of our hearts…by natural intuition. … If our
> lives are endangered by plots or violence or armed robbers or enemies, any
> and every method of protecting ourselves is morally right.””
> Cicero
> 
> J Bryan Krämer       North Florida, USA
> photos at: http://pbase.com/photoburner
> 
> 
> On Wed, Feb 24, 2021 at 4:25 PM Kreigh Tomaszewski <kreigh at gmail.com> wrote:
> 
>> Strong evidence that the dinosaurs were killed-off 66 million years ago by
>> an asteroid hitting Earth has been found in Chicxulub crater under the Gulf
>> of Mexico. An international team has measured an abundance of the rare
>> element iridium in the crater and similarly high concentrations of the
>> element are known to occur in sediments laid down at the time of the
>> Cretaceous–Paleogene boundary (K–Pg) extinction event, which saw many
>> species on Earth vanish.
>> 
>> Measuring 200 km across, the Chicxulub crater is believed to have been
>> created by an 11 km-wide asteroid crashing into Earth. The impact would
>> have sent vast amounts of vaporized rock into the atmosphere, blocking out
>> the Sun and creating a winter that could have lasted lasted several
>> decades. The result, scientists believe, was the mass extinction of 75% of
>> species on Earth including the non-flying dinosaurs.
>> 
>> 
>> https://physicsworld.com/a/iridium-in-undersea-crater-confirms-asteroid-wiped-out-the-dinosaurs/
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