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Re: Archies in the Morrison?!
On Mon, 12 Jun 1995, Phillip Bigelow wrote:
> Tom Holtz <email@example.com> wrote:
> >Actually, at least one definite dromaeosaurid (the outgroup to Archie +
> >Ornithurae) is known from ~130 Ma (i.e., Utahraptor) and fragments from the
> >Morrison Fm. which might be dromaeosaurid (or might be Archaeopteryx!) from
> ^^^^^ ^^ ^^^^^^^^^^^^^^
> >the same age as Archie.
> I for one would appreciate any additional information on this material.
> as when collected, what elements were found, where is it housed, is anyone
> studying it, etc. Is it mostly scraps?
> While we're back on the subject of Archie, does anyone know if there are
> Solenhoffen-type lithographic limestones of TRIASSIC age anywhere in the
> world? By "Solenhoffen-type", I mean limy-mud bottom sediments in a
> warm-water protected barrier reef?
> Certainly there must be at least ONE site somewhere. If not Triassic,
> then how about Early Jurassic?
You read my mind! I would _LOVE_ to find some nice lithographic
limestones of Late Triassic/Early Jurassic age somewhere! And,if they
_don't_ exist anywhere, barring complete erosion, could anyone suggest a
reason why they _don't_ occur in those time periods? (Barring lack of
Jerry D. Harris
Denver Museum of Natural History