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?

5 comments:

Richard Carter, FCD said...

No idea, but I'd be prepared to wager a couple of quid on the latter.

Roger B. said...

Fossilised worm burrows perhaps?

Kate said...

Definately look like trace fossils to me.

(some sort of scale would be useful though - I usually use a lens cap for reference)

beatingthebounds said...

I would be fascinated to know the answer if you ever fathom this one out. Who ever did it had a talent for graffiti!

Cliff Thornton said...

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.