Lewis_ Posted January 4 Share Posted January 4 Is this a fossil? Maybe fenestella? Or is it natural Link to post Share on other sites
digit Posted January 4 Share Posted January 4 Possibly, extremely worn down. Also likely option is a trace of an ancient shoreline or other ancient surface where the texture has been lithified and preserved. Cheers. -Ken 1 1 Link to post Share on other sites
ClearLake Posted January 4 Share Posted January 4 Can we see the edge to see if this is on a bedding plane or a cross section? My first idea was, like Ken, maybe ripple marks. Any idea on the age of the rock? I think Wales has a wide range of geologic ages. Link to post Share on other sites
Lewis_ Posted January 4 Author Share Posted January 4 29 minutes ago, ClearLake said: Can we see the edge to see if this is on a bedding plane or a cross section? My first idea was, like Ken, maybe ripple marks. Any idea on the age of the rock? I think Wales has a wide range of geologic ages. I’m not really sure on the age of this one, I’ve found crinoid,rugosa,clam? And other shell fossils further up the coast but the beach I’ve found this on I’m not that familiar with and a lot of rock from elsewhere has come here as a sea defence Link to post Share on other sites
ClearLake Posted January 4 Share Posted January 4 Well, it looks like it is on the bedding plane based on your last photo, so I'm going to suggest it is ripple marks or some such similar sedimentary feature, although they are small ones. 1 2 Link to post Share on other sites
digit Posted January 5 Share Posted January 5 44 minutes ago, Lewis_ said: a lot of rock from elsewhere has come here as a sea defence Yup. When people move around rip rap to protect beaches from erosion the exotic rock can really mess up a rockhound. Cheers. -Ken 1 1 Link to post Share on other sites
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now