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

[Dora Smith]

I looked into this tired old controversy.

It really only matters in terms of what it would take to have the same 
effect again.

Actually the asteroid impact occurred right in the middle of the Deccan 
Trap eruptions and changed their nature.   There was definitely an 
abrupt effect on earth's life caused by the meteor strike.

Dora


On 2/25/21 9:45 AM, Axel Emmermann wrote:
> Andrew,
>
> but flood basalts pollute the air with numerous dangerous gases.
>
> Fluorine will cause painful and life threatening skeletal growths. There
> were some early colonies in America where nearly ALL settlers died due to a
> massive volcanic eruption in... wait for it... Iceland. The Laki volcano
> erupted causing on of the severest winters on the northern hemisphere. In
> spring an summer 1783–84 nearly 25.000 people died in Great Britain alone.
> The following faming is believed to have led to the FrenchRevolution.
>
> In Indonesia (former Dutch East Indies). Mount Tambora exploded and filled
> the atmosphere with an aerosol of sulfuric acid, which blocks the heat of
> the sun. That year, 1815, was called 'the year without summer'.
>
> Then there are, family of sulfur, selenium and tellurium expelled during
> volcanic eruptions. These can make egg shells harder so that hatchlings
> can't get out.
>
> I DO see how flood basalts can cause mass extinctions. Especially since
> those last for thousands of years and certainly dwarf even eruptions like
> Tambora, Krakatau, Yellowstone, etc...
> The Deccan traps in India where formed about 66.250.000cyears ago, at the
> end of the cretaceous era. Which is pretty close to the extinction of the
> dinosaurs. 1.5 km² was covered with lava in an eruption that lasted 30.000
> years. Can't have been good for the climate.
>
> Cheers
> Axel
>
> -----Oorspronkelijk bericht-----
> Van: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> Namens Andrew
> Turner
> Verzonden: donderdag 25 februari 2021 1:36
> 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
>
> Don't see how the flood basalts in Washington (my home area - Tri Cities)
> could have contributed much to a mass extinction event and surely not more
> than a meteorite/comet impact or even explosive, caldera-like eruptions.
> The flood basalts weren't very explosive events, they are basaltic (similar
> to Hawaii) by definition.  Not very viscous and free-flowing.  So, they
> would definitely affect the nearby area and cause a temperature increase in
> the immediate region, but they most likely wouldn't have a "nuclear winter"
> or large-scale global effect of a meteorite impact.  That time period was
> very active for volcanoes, but flood basalts are a bit different phenomena.
>
> Andrew Turner
>
>
> ________________________________
> From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> on behalf of
> Tim Fisher <nospam at orerockon.com>
> Sent: Wednesday, February 24, 2021 3:57 PM
> To: 'Rockhounds at drizzle.com: A mailing list for rock and gem collectors'
> <rockhounds at rockhounds.drizzle.com>
> Subject: Re: [Rockhounds] Iridium in undersea crater confirms asteroid wiped
> out the dinosaurs
>
> Was that Nick Zentner? That would really surprise me.
>
> Tim Fisher
> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Forerockon.co
> m%2F&data=04%7C01%7C%7Cea537f03ef71427249ab08d8d91ff65e%7C84df9e7fe9f640
> afb435aaaaaaaaaaaa%7C1%7C0%7C637498078590261847%7CUnknown%7CTWFpbGZsb3d8eyJW
> IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sd
> ata=%2FsUeJxt0D99kRWcZvb1wD6XE5VGf4m4g4I1RNfCU1PE%3D&reserved=0
> Email nospam at orerockon.com
>
> -----Original Message-----
> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On
> Behalf Of Axel Emmermann
> Sent: Wednesday, February 24, 2021 3:02 PM
> To: 'Rockhounds at drizzle.com: A mailing list for rock and gem collectors'
> Subject: Re: [Rockhounds] Iridium in undersea crater confirms asteroid wiped
> out the dinosaurs
>
> Bryan,
>
> both events are not so far apart on the geological timescale.
> Most likely both events conspired to the demise of the dinosaurs.
>
> Axel
>
>
>
> _______________________________________________
> Rockhounds mailing list
> Subscription Services:  http://rockhounds.drizzle.com/mailman/listinfo/rockhounds_rockhounds.drizzle.com
> List Usage Policy: http://Tomaszewski.net/Kreigh/Rockhounds/Rockhounds.shtml