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tc

Cretaceous Climber
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Posts: 35
Reply with quote  #1 
A few 'things' I found on the IoW last week that I can't put a name to - I'm covering my options here as I'm not entirely convinced all of them are actually fossils [wink]

The first is a partial whorl of a 'Hoplites-like' ammonite from the Lower Greensand south of Shanklin. My first thought was H. dentatus but I associate that with the Gault, is it also present in the Lower Greensand?

Ammonite.JPG 

The rest of the 'fossils' are from the Oligocene of Bouldnor Cliff. I'm hoping the first two might be bone but I'm not holding my breath.

M1.JPG 

M2.JPG 

As to the identity of the items in the next two pics I've no idea at all. To me they look organic but I may well be completely wrong about that...

M3.JPG 

M4.JPG 

All advice gratefully received [smile]

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Rolo

Jurassic Jumper
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Posts: 135
Reply with quote  #2 
pic 3 is bone, pic 2 isn't and I'd suspect man made. The last pic looks identical to the worn silicified stems of the tree fern 'Tempskya' from the lower cretaceous Wealden. I have no idea if similar is found in the Oligocene though. Cant help with the others.
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tc

Cretaceous Climber
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Posts: 35
Reply with quote  #3 
Quote:
pic 3 is bone, pic 2 isn't and I'd suspect man made.


Aha, that supports my earlier hypothesis that pic 2 might be of a broken mug handle!

It's interesting that you mention Tempskya. There weren't many fossils to be found at Shanklin other than a few bivalves and enough shipworm-bored driftwood to build a shed out of. That said, some of the driftwood showed clear concentric growth rings and I assumed it was from Araucaria. Other pieces had no obvious growth rings but a 'solid' core with 'fibrous' material around it (sometimes the 'fibrous' part had radial splits visible in cross-section). I'd put those down as Tempskya but then again they weren't silicified as I believe they often are. Hmm.
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tc

Cretaceous Climber
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Posts: 35
Reply with quote  #4 
I've had a reply from the BMNH regarding the lumpy brown objects in Pic 4 and they're no longer a mystery. They're '...iron pyrite formed by bacterial degradation of organic matter within the seabed - probably replacing or adjacent to fossil wood'. 
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Fossilamn14

New Member
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Posts: 2
Reply with quote  #5 
Nice finds. Are you sure that the ammonite came from the lower greensand not the Gault because between shanklin and monks bay it is mainly Gault clay.
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tc

Cretaceous Climber
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Posts: 35
Reply with quote  #6 
Quote:
..between shanklin and monks bay it is mainly Gault clay.


Ah, that would make sense! I found the 'Hoplites' ammo fragment (along with several 'cat's paws') poking out of the beach near Horse Ledge just south of Shanklin.
I think the cliffs there are Lower Greensand though?

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Fossilamn14

New Member
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Posts: 2
Reply with quote  #7 
Hello, I have just checked my geological map of the Isle of Wight, it is gault clay by horse ledge then just north of horse ledge is the Sandrock beds and ferruginous sands.
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