Paleonet: Unusual trace fossil

Paul Blake p.blake at
Mon Jul 13 11:55:52 GMT 2015

Thanks for the responses.  I will follow up with the people suggested and
see if they have any ideas.



Paul Blake



From: Paleonet [mailto:paleonet-bounces at] On Behalf Of Carl Mehling
Sent: Friday, 10 July 2015 11:32 PM
To: PaleoNet
Subject: Re: Paleonet: Unusual trace fossil


Undichnia is the most common ichnogenus for fish swimming traces. I think
that would explain the parallel sinuous trails. But the circular impressions
are anomalous!


-----Original Message-----
From: Paleonet [mailto:paleonet-bounces at] On Behalf Of Tony Wright
Sent: Friday, July 10, 2015 7:36 AM
To: 'PaleoNet'
Subject: Re: Paleonet: Unusual trace fossil


Hi Paul,

This is way out of my field, but the sinuous trace you showed immediately
reminded me of something Ross Parkes showed me at Quidong in late Silurian
rocks. He said the trace was caused by a fish! I had no reason to doubt him,
but have really nothing to add. The parallel lines do nothing for me. I'm
not sure where Ross ended up, perhaps at CSIRO or GA in Canberra. Someone at
Macquarie might know if you want to contact him. It will be interesting to
see what responses you get. One of our UoW PhD graduates (Kerrie Bann,

 <mailto:kerriebann at> kerriebann at would be my
first stop for either an answer/opinion or guidance, but she probably does
not do paleonet.




-----Original Message-----

From: Paleonet [ <mailto:paleonet-bounces at>
mailto:paleonet-bounces at] On Behalf Of Paul Blake

Sent: Thursday, 9 July 2015 5:26 PM

To: 'PaleoNet'

Subject: Paleonet: Unusual trace fossil





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



Paul Blake
































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