Hi, Please can you help ID if this is a mussel, if so if any particular kind/age/other info? It was found in a disused limestone quarry in Fife, which is teeming with masses of crinoid fossils.
Sorry you didn't get a response.
Yes - it appears to be a fossil oyster, though I can't say which one.
It has similarities with Gryphaea spp.
Here's a photo, giving an idea of what yours should look like from the side
I have to say, though, the appearance of your specimen (1375700208818.jpg) looks a bit odd; it looks like a fake. It gives the impression those ridges come to abrupt ends, rather than curving round gracefully (as in the photo I linked to). I know such an appearance can arise in 'thick' specimens, but the shadows in the photo do not suggest such 'thickness'. Also, the other photo (1375700223979.jpg) shows an operculum (closing plate) that looks more like an ammonite aptychus.
- Do you have a photo of the specimen from the side?
- Is there a chance it might be a fake? (Are you sure it came from a quarry?)
Thanks for replying
I found the fossil myself in an eroded embankment in a quarry so it's definitely not a fake!
I doesn't stand up on it's own on the side as it's pretty thin, I have leaned it against another fossil we found in the same quarry and tried to get photos from both sides- does that help at all?
Thanks for the extra photos.
Curiouser and curioser...
I don't know.
If nobody else comes up with an ID in a few days, I think you may need to bring or send it into the Angela Marmont Centre Identification and Advisory Service at the NHM.
The first specimen does look like a Gryphaea sp that has suffered some 'trauma' because of the fossilisation process or the geological timescale and the forces of nature.
I have attached an image of two Gryphaea arcuata - one with the rock removed and one as we usually find them on the Yorkshire coast they come from the Lower Jurassic - lower Lias and are aprox two hundred million years old.
Your second fossil looks to be a Brachiopod with two unequal half's to the specimen unlike bivalves that have two equal sides, Pseudopecten for example, similar to a Scallop.