Thảo luận:Kỷ Đệ Tứ

Redefinition and base of Quaternary and Pleistocene

Excuse me for writing in English. I received the following message from a colleague. I suggest (if still necessary) the relevant pages should be modified accordingly:

Dear Quaternary colleague,

The International Union of Geological Sciences (IUGS ) has recently ratified to redefine the base of the Quaternary and Pleistocene at 2.6 Ma (see below). The end of a long lasting battle?

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REDEFINITION OF THE BASE OF QUATERNARY SYSTEM/PERIOD, AND OF THE BASE OF THE PLEISTOCENE SERIES/EPOCH

The IUGS Executive Committee has ratified a request from the IUGS International Commission on Stratigraphy (ICS) regarding the definition of the base of Quaternary System/Period (and top of the Neogene System/Period), and redefinition of the base of the Pleistocene Series/Epoch (and top of the Pliocene Series/Epoch). The ICS submitted for IUGS ratification its recommendation that:

1) the base of the Pleistocene Series/Epoch be lowered such that the Pleistocene includes the Gelasian Stage/Age and its base is defined by the Monte San Nicola GSSP, which also defines the base of the Gelasian;

2) the base of the Quaternary System/Period, and thus the Neogene-Quaternary boundary, be formally defined by the Monte San Nicola GSSP and thus be coincident with the bases of the Pleistocene and Gelasian; and

3) with these definitions, the Gelasian Stage/Age be transferred from the Pliocene Series/Epoch to the Pleistocene.

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More information on the subject can be found on our website: http://www.geo.uu.nl/inqua-nl/ or on http://www.quaternary.stratigraphy.org.uk/ Kind regards,

JS On behalf of INQUA-Netherlands

PalaeoMal (thảo luận) 09:13, ngày 28 tháng 7 năm 2009 (UTC)

Kỷ Đệ tứ

Trong thang địa tầng 2009 của ICS, nó được xếp thành 'kỷ trong Đại Tân Sinh. Nên tên bài cần đổi thành "Kỷ Đệ tứ".--Tranletuhan (thảo luận) 03:07, ngày 13 tháng 6 năm 2011 (UTC)