Paleonet: Unknown fossils and some help?

Frank Holterhoff frankholterhoff at gmail.com
Fri Jul 28 02:06:49 UTC 2023


I agree that the second one looks like a crinoid arm.  I know that Upper
Ordovician Martinsburg Fm. fossils are preserved as limonitic molds like
this in some places, most notably the old Swatara Gap collecting site in
Pennsylvania.

Russell, is it possible that this specimen could be Upper Ordovician rather
than from the Hamilton Gp.?

Frank


On Wed, Jul 26, 2023 at 1:14 PM Mario Cournoyer <paleovision at videotron.ca>
wrote:

> Hello Russel!
>
> You should post those pics on any geological period Facebook group pages,
> like “The Devonian Period”, etc. You would be surprised to see how many
> good people there are there.
>
> I’m stumped for the three pics, but very intriguing! Second might be a
> crinoid arm but the preservation don’t look like typical Hamilton Grp of
> Ontario (yes it’s Middle Devonian).
>
> Mario Cournoyer
>
> > On Jul 26, 2023, at 11:59 AM, Russell Bicknell <rdcbicknell at gmail.com>
> wrote:
> >
> > Hi PaleoNet People!
> >
> > So I have been having a look through the AMNH collection and came across
> three fossils that have very limited metadata but look really interesting.
> I was hoping someone out there might be able to help!
> >
> > The first is from Costa Rica, age known
> > The second is from the Hamilton Group, ??Devonian
> > The third is from the Clinton Shale, Silurian.
> >
> > Any help would be greatly appreciated, and may lead to some interesting
> collaborations!
> >
> > Cheers!
> >
> > Russell Bicknell.
> > <3 fossils.pdf>_______________________________________________
> > Paleonet mailing list
> > Paleonet at paleonet.org
> > http://lists.paleonet.org/mailman/listinfo/paleonet
>
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