I was wondering if anyone could i.d this ammonite that one of my lads found on the Holderness coast recently?
It is about 8cm across with the well defined phragmocone preserved in stable iron pyrites and the living chamber standing out from the rest of ammonite because of it being filled with sediment that has turned to stone.
Thank you for any i.d.s.
Another Holderness coast ammonite that I would like the I.D for.
This time the phragmocone is preserved covered in it's shell but the living chamber is full of a mineral.
I think it could be Arnioceras, but I may be wrong.
www.fossiliferous.co.uk has a lot of simular fossils
Also Yorkshire Coast fossils is a good website which has every, or almost every species of Yorkshire Coast ammonite.
Dactylioceras is upper lias and Arnioceras is lower lias, (both Lower Jurassic) unfortunately i think it is not either of them.
Gagaticeras? Androg? if it's a Gagaticeras it is a big one but I think it is more like an Androg.
Thank's for the input.
It looks a bit like an androg ammonite, but I'm not sure because I don't really know much about Holderness ammonites. I am more firmiluar with whitby ammonites- there seems to be more species found on the Holderness than there is in Whitby.
Nice ammonite which is in your other recent post