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

[Axel Emmermann]

Doug & all,

My boss at work started a discussion with me since I was known to dabble in science. The guy was a civil engineer!
He said that there was no way that people could have landed on the moon, because they couldn't traverse the thermosphere... One of the outer layers of our atmosphere where all kinds of radiation get absorbed. It's too hot there, rockets would melt.
It IS hot there... up to 2.000 °c. But the guy didn't think it through. He didn't grasp the concept of kinetic temperature... Sure, the air molecules are that hot and subsequently move at very high velocities, but there are not enough of those to harm a space ship!
People aren't really stubborn but rather stupid, ignorant, misinformed, undereducated, or all of the above.

Axel

-----Oorspronkelijk bericht-----
Van: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> Namens Doug Bank
Verzonden: donderdag 25 februari 2021 0:03
Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors <rockhounds at rockhounds.drizzle.com>
Onderwerp: Re: [Rockhounds] Iridium in undersea crater confirms asteroid wiped out the dinosaurs

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-astero
>> id-wiped-out-the-dinosaurs/ 
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