Is there a living creature that digs channels in Jurassic shale beaches on the North Yorkshire coast to cruelly mislead me, or could these be Jurassic critter tracks?
31 Jan 2009
Squiggles in Jurassic shale: help needed.
Is there a living creature that digs channels in Jurassic shale beaches on the North Yorkshire coast to cruelly mislead me, or could these be Jurassic critter tracks?
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5 comments:
No idea, but I'd be prepared to wager a couple of quid on the latter.
Fossilised worm burrows perhaps?
Definately look like trace fossils to me.
(some sort of scale would be useful though - I usually use a lens cap for reference)
I would be fascinated to know the answer if you ever fathom this one out. Who ever did it had a talent for graffiti!
Fossils are always solid, so if this is a fossilised worm track then there should be a corresponding piece of shale in which the tracks are protruding proud of the surface.
If you have a geologist's hammer, or a chisel, then try splitting some of the adjoining strata to see if you can find examples of both types of track.
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