Dear David,
Others including myself would be interested in the answer to your question, so perhaps replies could indeed be posted to the list. As an aside, the ICS time scale is certainly authoritative, but it does not as I understand become "official" until sanctioned by the IUGS in Oslo, 2008.
Martin
On 10 Jul 2006, at 09:40, David Goodwin wrote: Dear Paleonet,
I am looking for some clarification about the official Pliocene time scale. Gradstein et al., 2004 seems to define the Piacenzian as Middle Pliocene (Page 416 and Figure 21.1) But the color plates in the front part of the volume does not include the Middle Pliocene - the Piacenzian and Gelasian are lumped together in the Late Pliocene. Is there officially Middle Pliocene time?
Please respond off list. Thank you.
Cheers, Dave
============================================================== Assistant Professor Department of Geosciences F. W. Olin Science Hall 100 Sunset Hill Drive Denison University Granville, OH 43023
Voice: (740) 587-5621 Fax: (740) 587-6774
Strange beautiful, grass of green, with your majestic silken seas, your mysterious mountains I wish to see closer -- Jimi Hendrix ==============================================================
------------------------------------------------------------------------ Martin J. Head Professor Department of Earth Sciences BROCK UNIVERSITY 500 Glenridge Avenue St. Catharines, Ontario L2S 3A1 CANADA Tel 905-688-5550 ext. 5216 Fax 905-682-9020 Email mjhead@brocku.ca
|