Re: Possible Impact crater in Australia

On 9/25/24 2:46 AM, x wrote:

On 9/24/24 16:48, erik simpson wrote:

https://www.sci.news/geology/massive-australian-precambrian-cambrian-impact-structure-13283.html
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If this crater (inner ring ~600 km, outer ring ~2000 km) proves out, this would make it the largest known impact event.  Chixilub is small potatoes compared to it.  Controversy surrounds the finding.
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Publication in scientific literature is forthcoming, but not yet available.  This would have obvious implications for the end-Ediacaran mass extinction.

 What evidence do you have for the idea that there was a mass
extinction at the end of the Ediacarian?
 With the Paleozoic, you had the formation of hard materials
that could more easily fossilize.
 Was the lack of fossils just lack of hard structures.
 Your use of the words 'end-Ediacaran mass extinction'
implies that you think that a mass extinction during
the time period was at least obviously true to yourself.
 If you are interested in convincing others that such
a mess extinction existed, provide evidence.
 

The end-Ediacaran extinction is well known.  Almost all the Ediacaran fauna disappeared.  The classical explanation includes increased oxygen in the water column, predation by early Cambrian animals with hard feeding appendages and bioturbation of the bacterial/algal mat that supported the "mudstickers" of the Ediacaran.
There are plenty of soft-bodied organisms fossilized in the Cambrian. I'm not interested in convincing you or anyone else in the reality of the extinction.  A little research is all anyone neeeds.