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RE: Resurrection of the Quaternary (was RE: Precisely Dating The KT Boundary)
> From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu]On Behalf Of
> Jerry D. Harris
> News to me, and I agree...I don't see much point in having any period
> defined by something other than stage boundaries! I'm guessing that they
> want this for one of two reasons: (1) it is a nice unit of time in which
> much of immediate human & hominid history has occurred, and (2) it probably
> brackets the time period for which extremely fine-scale geologic data
> (climate data, etc.) can be readily obtained. Dunno any of that for
> certain, though.
And there is their own particular field of "Quaternary Studies", whereas there
is no "Paleozoic Studies" or "Cretaceous Studies".
> The first time I saw "K/P boundary," I said the exact same thing, and I
> agree that this is what it _should_ be called, and am more than happy to do
> so myself. However, most of the papers I've seen already that discuss the
> boundary and eschew the term "Tertiary" have, for whatever (albeit
> erroneous) reasons, called it the K/P or K-P boundary. My guess is that it
> still rolls of the tongue nice and smooth, just like K/T boundary did. Even
> the 2004 Geologic Time Scale:
> Gradstein, F. M., J. G. Ogg, and A. Smith. 2004. A Geologic Time Scale 2004.
> Cambridge University Press, Cambridge, 589 pp.
> ...get this wrong, and call it the K-P boundary (e.g., p. 387).
> Interestingly, I haven't spotted anywhere in the book where they use "P" as
> an abbreviation for Permian (or, for that matter, where they discuss
> appropriate abbreviations at all, which I would assume that they also govern
> along with the nomenclature)
Well, it may be that the national geologic bodies dominate that. The following
link goes to a copy of the (somewhat outdated, esp.
as it uses the old USGS Precambrian symbols) list of geologic time
And if you scroll down to Paleogene, you find Pg (or more correctly,
> though I have no idea why. Maybe it's 'cuz Cretaceous workers always forget
> there was a Permian long before there was a Paleogene???
> Chronostratigraphic tunnel vision?
Thomas R. Holtz, Jr.
Senior Lecturer, Vertebrate Paleontology
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
Building 237, Room 1117
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796