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Re: Solnhofen quarrying pattern
David Marjanovic wrote:
However, nobody is digging, and there is not just one quarry.
The lithographic limestone deposits of Bavaria have yielded more than just
_Archaeopteryx_* and _Compsognathus_, including a small coelurosaur
discussed briefly by Viohl (1999).
(* = _Wellnhoferia_, _Jurapteryx_, _Archaeornis_, _Griphosaurus_,
Basically, the whole area consists of plated limestone. It's practically at
the surface. Must be similar in northeastern China (the Yixian and
Jiufotang Fms covering the western half of Liaoning and beyond), only much,
much, much larger...
This "beyond" may include an exposure across the Chinese border, in North
Korea (a.k.a the People's Loving Democratic Republic of Korea). The
primitive bird _Proornis coreae_ (the "North Korean Archaeopteryx", but it
may be a confuciusornithid), said to be from the Sinuiju Series, could be
part of the Jehol biota. There are apparently some wonderful vertebrate
fossils in this neck of the woods.