Paleonet: Unusual trace fossil

[Graciela Piñeiro]

Hi, Paul
I have found some similar structures in the Permian of Uruguay (continental
sequences). We have the same marks transversally disposed respect to the
bedding along to similar circular traces. But, see what happened when I
cleaned the transversal grooves: it appear to be a vertebrate track. We are
planning to study these tracks along with an Argentinian colleague but we
have not found other references yet. Maybe the pictures that I am sending
help you.
Best regards,
Graciela

2015-07-09 4:25 GMT-03:00 Paul Blake <p.blake at bigpond.net.au>:

>
> Hi,
>
> I have an unusual trace fossil and I am wondering if people know what may
> have made it.  Photo 1 is a picture of the outcrop.  On the left you can
> see
> a sinuous trail and on the right is trail made up of two parallel lines
> then
> a circular impression followed by two parallel lines and a circular
> impression etc.  Picture 2 shows a close up of the trail.  The parallel
> lines are approximately 7cm long.  The trail continues for about 40m and
> crosses itself in at least one place
>
> The trail is from the late Permian part of the Bowen Basin in Queensland,
> Australia and the environment is interpreted to be a shallow muddy river.
>
> Any information on what type of creature may have made the trail would be
> appreciated.
>
> Regards
> Paul Blake
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>
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