GuidesMagazineShopBuy FossilsJoin Hunts
Buzz2
I haven't seen anything similar . Found on foreshore at Ravenscar N.Yorks. I have cleaned it up a bit and the lumps are part of it. P1430334.jpg  P1430335.jpg  P1430336.jpg  P1430337.jpg  P1430338.jpg  Thanks for looking.
Quote 0 0
Brittle Star
Sorry, to me it looks like all the same piece of rock, see what others think.
JW

 Never ask a star fish for directions
Quote 0 0
Dirty Pete
I reckon the rock has expanded (secondary mineralisation?) and pushed the lumps apart leaving furrows between them. The lumps look as if they would fit back together again.
 
Thats my theory anyway.

Pete.
Quote 0 0
Buzz2
Thanks for the replies....I was pretty sure it wasn't a fossil...just intrigued by the lumps and what would cause them. That sounds quite plausible Pete.Thanks all.
Quote 1 0
henryrb
I think its iron pyrite made from bacteria [smile] but the back looks only like the average rock, if that's even a thing... [smile][confused]
Quote 0 0
Brittle Star
Hi
I do not see any iron pyrite, in my experience it either replaces a fossil like a small ammonite, coats it or forms crystals on the surface for example wood. I have never seen it form what we see here, I could be wrong but I see no evidence of any crystalline structure separate to the rock. Perhaps you could explain what brought you to that conclusion.
JW

 Never ask a star fish for directions
Quote 1 0
henryrb
Oh yes sorry the first time I saw this I only saw the top as the page had not loaded and I just found iron pyrite that looked very similar, sorry [smile]
Quote 0 0
henryrb
I also now see the that there is no difference in any part of the rock, Pete's theory seems correct by my personal opinion. [smile] 
Quote 0 0
Unregistered
Yep...no pyrite...I think Pete is right
Quote 0 0
Write a reply...


Discussions on fossils, fossil hunting, rocks, locations, and identifying your finds.
(C)opyright 2019 - UKGE Ltd and UK Fossils - Contact us