[meteorite-list] recent papers on the extinction of mammoths

[Göran Axelsson]

E.P. Grondine wrote:
> Hi Paul - 
>
> The problem with the Indiana dates is that they were calibrated using a global calibration curve, when it is now demonstrated beyond doubt that there are significant regional variations caused by some neutron sources.
> It is not known if these sources were impacts or supernova.
>   

[citation needed]

I have asked before and I repeat my question. In which publication is it 
"now demonstrated beyond doubt that there are significant regional 
variations caused by some neutron sources"?

And can you please make a copy and share with the list. You are claiming 
a lot but doesn't present any proof or references to any proof.

Respectfully, Göran Axelsson

> Late dates from Pribilov would not be surprising, given the late dates from Wrangle. There could be very good explanations for these, or again they may be erroneous dates caused by some neutron source. (Perhaps one connnected with the effects of the Earth's magnetic field, but who knows?)
>
> E.P. Grondine
> Man and Impact in the Americas
>
>
>       
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