[meteorite-list] Is the "K–T boundary" now the "K–Pg boundary" ? ?

[lebofsky at lpl.arizona.edu]

Hi Paul:

Yes, I was aware of this. I was working with another associate on a
"Cratering" workshop for teachers and she used the term K-P boundary. She
had to explain it to me and I had to make sure that she needed to explain
this to the teachers and not just throw the term out at them.

So is it P or Pg?

Larry

> Dear Listmembers,
>
> The people on this list, who work with the K-T Boundary might
> consider the likelyhood that the recent formal ratification of the
> Quaternary System/Period and the Pleistocene Series/Epoch
> systems has changes the "K-T Boundary" to the "K-Pg Boundary"
> As discussed by Gibbad et al. (2009), the formal ratification of
> the Quaternary System/Period and the Pleistocene Series/Epoch
> systems by the Executive Committee of the International Union
> of Geological Sciences (IUGS) has eliminated the "Tertiary" as a
> formally recognized Period. As a result, the Cenozoic Era is now
> divided into the Paleogene, Neogene, and Quaternary periods and
> the "Tertiary" has been completely abandoned as either a period
> or sub-era as shown in figure 1 of Gibbard et al. (2009). This
> means that that the "tertiary" has been stripped of any formal
> status in stratigraphic nomenclature. Thus, the "Cretaceous-
> Tertiary Boundary" is no longer recognized terminology and
> leaves the Cretaceous-Paleogene Boundary as the only officially
> sanctioned way in terms of stratigraphic nomenclature of
> designating this boundary.
>
> Reference Cited
>
> Gibbard , P L., M. J. Head , M. J. C. Walker, the Subcommission
> on Quaternary Stratigraphy, 2009, Formal ratification of the
> Quaternary System/Period and the Pleistocene Series/Epoch
> with a base at 2.58 Ma. Journal of Quaternary Science.
> Published Online:  22 Sep 2009
>
> http://www3.interscience.wiley.com/journal/122602421/abstract
>
> Yours,
>
> Paul H.
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