[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.

> ______________________________________________

> http://www.meteoritecentral.com

> Meteorite-list mailing list

> Meteorite-list at meteoritecentral.com

> http://six.pairlist.net/mailman/listinfo/meteorite-list

>