Paleonet: Help with some fossils

[Wright, David F. (Davey)]

I agree with Virginia and Roy. My best guess is that they are some kind of analog to a cone in cone structure. Alternatively, could they be traces of some kind of plant/root system? It would make sense given that it was deposited proximal to a coast.


Cheers,


-Davey


*****************

David F. Wright
PhD Candidate
School of Earth Sciences
The Ohio State University
275 Mendenhall Laboratory
125 South Oval Mall
Columbus, OH 43210

wright.1433 at osu.edu




________________________________
From: Paleonet <paleonet-bounces at nhm.ac.uk> on behalf of Roy Plotnick <plotnick at uic.edu>
Sent: Tuesday, June 24, 2014 12:16 AM
To: friedmanhvj at yahoo.com; PaleoNet
Cc: pkuxue at pku.edu.cn
Subject: Re: Paleonet: Help with some fossils

i was thinking the same thing - Roy
On Jun 23, 2014, at 10:47 PM, friedmanhvj at yahoo.com<mailto:friedmanhvj at yahoo.com> wrote:

To me they don't seem biological in origin, they look  like cone in cone structures.

Virginia Friedman


On Monday, June 23, 2014 3:49 PM, Roger D. K. Thomas <roger.thomas at fandm.edu<mailto:roger.thomas at fandm.edu>> wrote:


Dear Jinzhuang,

     Cephalopods are often current-aligned, as in the case of Mississippian examples in the Grand Canyon that have been interpreted by Creationists as evidence of the Great Flood (!!).  Ordovician orthoconic cephalopods were long ago studied and interpreted more conventionally by Richard Reyment as being oriented horizontally and vertically by marine currents.
     However, the crossbars on your specimens show no indication of being relatively widely and regularly spaced, like cephalopod chambers.  Also, some specimens appear to be slightly bent, although this could be a result of asymmetric compression or structural deformation.  The photograph appears to show a bedding plane surface.  Is this correct?

     Conulariids, by any chance?

     Kind regards,   Roger


On Thu, Jun 12, 2014 at 2:37 AM, Jinzhuang Xue <pkuxue at pku.edu.cn<mailto:pkuxue at pku.edu.cn>> wrote:
Dear all,
     The attached is a picture showing some conical things horizontally laying on the bedding plane of sandstones. They look like stromatolite but they are not.  But, are they trace fossils? sedimentary structures? or anything else?  We are wondering if anyone here could help us for identifying them.  Has anyone found similar things before?  Thanks a lot in advance.  The age of the rock is Late Devonian Famennian, and the depositional environments may be swamps near coastal area.

All the best,

Jinzhuang Xue
Peking University
????????pkuxue at pku.edu.cn<mailto:pkuxue at pku.edu.cn>
??????????2014-06-12




_______________________________________________
Paleonet mailing list
Paleonet at nhm.ac.uk<mailto:Paleonet at nhm.ac.uk>
http://mailman.nhm.ac.uk/mailman/listinfo/paleonet




--
Roger D. K. Thomas
John Williamson Nevin Professor of Geosciences
Secretary-General, International Palaeontological Association
___________________________________
Department of Earth and Environment
Franklin & Marshall College
P.O. Box 3003
Lancaster
Pennsylvania 17604-3003
______________________________
Office telephone:   717-291-4135
Office fax:     717-291-4186
Home telephone:    717-560-0486
http://www.fandm.edu/rthomas

_______________________________________________
Paleonet mailing list
Paleonet at nhm.ac.uk<mailto:Paleonet at nhm.ac.uk>
http://mailman.nhm.ac.uk/mailman/listinfo/paleonet


_______________________________________________
Paleonet mailing list
Paleonet at nhm.ac.uk<mailto:Paleonet at nhm.ac.uk>
http://mailman.nhm.ac.uk/mailman/listinfo/paleonet

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.paleonet.org/pipermail/paleonet/attachments/20140624/ffc4adb3/attachment.htm>