Somehow you have managed to miss the view I was hoping for! [smiley]
If you could take one showing each of the 'long' sides, that would be helpful. I need to see if there is any fabric in the rock that follows the undulations of the main feature.
No worries, Mike - and thank you for your help and guidance. I'll do some pictures in the morning.
Ah ... stand by ... I think I've got one, using an LED array ...
Here you go. There is nothing apparently interesting on the other side (the furthest from the "print")
If it needs to be bigger, just shout. I have a 14MP copy.
It doesn't need to be bigger as such; I just need to see closer-up (and it needs to be sharp, so you'd need a macro facility of one sort or another).
So, to avoid a big file, and if it is sharp enough, perhaps can you crop the 14Mp copy to show just the cross-section of the undulating bit including about half the rock below it?...
Thanks. That's the area I wanted to see. It could be sharper, but I get the impression there is a fabric in the surrounding rock that follows the undulations of the main feature (which also has internal layers). that leads me to think it is entirely non-fossil. I think what you have is a cobble composed of schist including a pale layer (probably quartz) which could have been a plane (flat) vein at a stage prior to the folding that simultaneously buckled the host rock and the pale layer. The curious shape you see now, in your specimen, is a consequence of how the surface of the cobble intersects the larger 3-dimensional buckled structure.
There are some curious things in the last photo, however, and I can't decide if they are fossils or minerals. If you could post a sharper photo showing the same are, that might help. That might alter my opinion.
So, you don't think that the undulations in the rock immediately below the imprint are due to weight being applied to once-soft material?
I'm also puzzled as to why the material in the delves has "squished" over the edges, in an oozing pattern - again suggesting (to my hopelessly ignorant lay mind) that they were created by weight being applied as if by three extended toes.
The small delves at either end, suggesting fourth and fifth toes (was there such an animal?) again suggest that the marks have been caused by weight pressure.
I don't follow your "squished" over the edges" observation, but the 3D shape of the undulations (thinking beyond the cobble) is well within the range of shapes exhibited by small-scale structural folding.
If the undulations were made by a foot, the five parallel toes would be unusual.
No, I don't "think that the undulations in the rock immediately below the imprint are due to weight being applied to once-soft material".
But, like I say, I can't be sure of my explanation until I determine if the small marks I see in the last photo are fossil or mineral.
(One could also postulate that the main feature looks like part of a mammoth tooth, but the similarity is very superficial.)
Here are some examples of small-scale structural folding for you to consider:
- http://images.nationalgeographic.com/wpf/media-live/photos/000/009/cache/gneiss-lines_978_600x450.jpg (from National Geographic, original page no longer exists)
The last one is important since it gives you an idea of how undulations, which look simple in cross-section, can appear more complex in other sections.
This is really interesting and the last image, in particular, is an excellent illustration of what shapes can be made by simple folding.
As I said, I have no idea about rocks and I think you've pretty much convinced me. The fourth and fifth "toe" marks made me doubt that it could be an animal print - even if one of them was from the other foot, it would be on the wrong side. I still see "squishes" though but that's probably me seeing what I want to see.
I'll try to get a better image, tomorrow, of the last section I showed.
Thank you for your insights. Again, this is fascinating.
I hate to say because other replies are more expert but it looks to me to be the remains of the edge of an Ammonite ie from a vertical view from the centre looking out, the remains of the external worls are deminished left and right of the 3 central impressions
I know what you mean, Steve, but:
- there is no sign of any suture or septum, and
- as stated, I am not sure yet; mine is only a working hypothesis; I would be happy to be proved wrong by you
It helps, but it also continues to frustrate! There are definitely a lot of platy grains in the dark host material, but I still can't decide (without a microscope) it they're mineral or fossil.
While I would not be too surprised to find metamorphic rocks on the beach at Redcar, local (non-metamorphic) ones would obviously be more common (from the Redcar Mudstone Formation). That leans me towards the platy grains in the dark material being fossil.
There is a slight radial arrangement of the undulations, which would fit with your ammonite idea, Steve.
And I have found this specimen/image from Redcar/Marske, by 'ChrisJH'
- http://www.discussfossils.com/forum/forum_posts.asp?TID=2880&title=recent-fossils-from-redcar (the second photo). That has similarities to yours, Alastair, and it is clearly part of an ammonite, albeit without visible sutures or septa.
So on balance, I go with Steve in suggesting it is probably part of an ammonite. Good call steve.
An ammonite, albeit obviously quite a large one
Well, you practically trip over those things on Redcar beach - those and the other local non-rarity, "Devil's Toenails" (Gryphaea).
Thanks for all your help guys. It's been interesting and enlightening. I'm amazed, whenever I come across this sort of thing, at the depth of specialist knowledge some people have.
I will agree with the depth of knowledge posters show on this site I am learning new things everyday sometimes I have no idea what they are talking about I
It amazing the things people find and then ponder on what it is, long live mans curiousity in nature
Your find has created some interest.
Steve said what it is - an edge of an ammonite probably Paracoroniceras sp.
North East coast 'Paras' are very rare unlike the south coast specimens and to find a piece of one is good.