Re: Shar Tsav age

["Jaime A. Headden" <qilongia@yahoo.com>]

David Marjanovic (david.marjanovic@gmx.at) wrote:

<No. The paper I have says "The age of the deposits is considered to be
the Djadokhta", but it's not exactly new. Identifiable fossils are
*Avimimus* and *Quaesitosaurus*, everything else (including eggshells) is
fragmentary. Maybe someone correlated *Q.* to *Nemegtosaurus*? I haven't
found a mention of tracks in the paper, but I haven't read it carefully so
far.>

  The Ivakhnenko and Kurzanov paper aside, most biostratigraphic data
gives a mid to late Campanian age to the Udan Sayr locality, the absence
of *Protoceratops* and *Velociraptor,* and with Nemegtian-age fauna
(nemegtosaur, leptoceratopsid, and avimimid) suggests either a
Baruungoyotian or Nemegtian age for the locality. Recovery of the
Nemegtian *Elmisaurus* includes an *Avimimus* partial tibiotarsus
(Osmólska's "Theropoda gen. et sp. indet.) indicates this is even more
strongly supportive of an upper Campanian rather than lower
Campanian-Santonian age attributed to the Djadokhta and equivalent levels.

<M. F. Ivakhnenko, S. M. Kurzanov: Geological structure and age of
Udan-Sair and Shara-Tsav localities, 100 -- 105 in Ye. N. Kurochkin
(responsible editor): Fossil reptiles and birds of Mongolia. The joint
Soviet-Mongolian palaeontological expedition transactions 34, Nauka 1988
(in Russian with a very short English summary; the Mongolian table of
contents spells Üüden sayr and Shar tsav).>

  Cheers,

=====
Jaime A. Headden

  Little steps are often the hardest to take.  We are too used to making leaps 
in the face of adversity, that a simple skip is so hard to do.  We should all 
learn to walk soft, walk small, see the world around us rather than zoom by it.

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