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Re: Silesaurus' Age



Posted for Jerry Harris:
____

In re: the age of the new Polish dinosaur reported on the list:  the site from 
which the specimens came canNOT be Ladinian in age, and where the article's 
cited "230 million year old" age comes from is unknown.  The same site has 
produced the index taxa _Paleorhinus_ (a phytosaur), _Metoposaurus_, and other 
taxa indicative of a Carnian, not Ladinian, age, based on global terrestrial 
tetrapod biostratigraphy.  See:

Dzik, J. 2001. A new _Paleorhinus_ fauna in the Early Late Triassic of Poland. 
 Journal of Vertebrate Paleontology 21(3): 625-627.

This message paraphrased from an e-mail from Spencer Lucas. Feel free to pass 
it on to the list.  Looks like we're gonna hafta wait a bit longer for Ladinian 
dinosaurs!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jerry D. Harris
Dept of Earth & Environmental Science
University of Pennsylvania
240 S 33rd St
Philadelphia PA  19104-6316
Phone: (215) 573-8373
Fax: (215) 898-0964
E-mail: jdharris@sas.upenn.edu
 and     dinogami@hotmail.com
http://www.sas.upenn.edu/~jdharris

"What can you make of this?"
"This?  Why, I can make a hat...or a
   broach...or a pterodactyl..."