Re: Geological timescale

["David Marjanovic" <david.marjanovic@gmx.at>]

> So have we seen the last of Tertiary and Quaternary?

Yes. And the Vendian has been abandoned
http://www.stratigraphy.org/prec.htm. :.-( Some other things will require
getting used to; the Carboniferous used to start with Tournais, Visé, Namur,
now it starts with Tournais, Visé, Serpukhov... the Cambrian is divided into
Early Cambrian, Middle Cambrian, and Furongian... most stages of the
Ordovician are unnamed... It's interesting they didn't introduce the Middle
Cretaceous; as used in Glut's Supplement 3 (Albian + Cenomanian), it would
make quite some sense, being bounded by two noteworthy mass extinction
events.

BTW, the Holocene now began 11,500 years ago, not 10,000.
http://www.stratigraphy.org

I still haven't found why the K-T boundary is given as 65.5 +- 0.3. I
suspect the discrepancy between U/Pb in zircons vs Ar...