Am thinking geode or is it something else completely?!

[Red Benjamin]

Hi all,

Location: West Somerset Coast. 

Length approx 4 inches.

Geology is Blue Lias but i was so far out to sea that it may be late triassic 0_o

We've had very low tides here of late which have stripped the mud layer and have been exploring the revealed rock beds  found a full bed of devils toenails, alongside modern day oysters..

Also found this, which is not like anything encountered down there before. 

Sorry in advance for the poor images, the specimen remains in situ..

What interests me is (all of it!) .. the apparent uniformity and the small circular depression in the middle at the bottom.

ps the geology in the area was subject to considerable tectonic activity during the period of formation

Can anyone help? 

All the best in your quests

Ben

[ynot]

Does not look like a geode, it is a fossil but I do not know what it is.

Neat find, looking forward to what others have to say.

Tony

[Red Benjamin]

6 minutes ago, ynot said:

Does not look like a geode, it is a fossil but I do not know what it is.

Neat find, looking forward to what others have to say.

Tony

That's very interesting Tony, many thanks for your comment! now i'm more exited about this object

[Fossildude19]

I think this may be a cross section through a nautiloid or ammonite.  

Neat looking find. 

Regards, 

[TqB]

I'm sure it's a Cenoceras nautiloid. A typical fossil from the Hettangian upwards in the Lias, but never common and always nice to find.

[Ludwigia]

Tarquin is correct. That is a Cenoceras nautiloid. The devils toenails(Gryphaea) also give a clue to the stratigraphy.

[Red Benjamin]

1 hour ago, Fossildude19 said:

I think this may be a cross section through a nautiloid or ammonite.  

Neat looking find. 

Regards, 

Hi Tim and thank you kindly, i wonder if i'll ever find it again out there in the mud, but i will sure go looking!

[Red Benjamin]

6 minutes ago, TqB said:

I'm sure it's a Cenoceras nautiloid. A typical fossil from the Hettangian upwards in the Lias, but never common and always nice to find.

Tarquin! thank you for your super duper knowledge, have never found or seen a nautilus here (anywhere else for that matter!)

[Red Benjamin]

9 minutes ago, Ludwigia said:

Tarquin is correct. That is a Cenoceras nautiloid. The devils toenails(Gryphaea) also give a clue to the stratigraphy.

Well that is a turn out for the books, thank you it is a pleasure to share a first with you good people.. 

ps here's a sample shot of i think the Gryphaea in situ.. they differ from the normal ones i find here in that they are quite flat!

many thanks again

Ben and Red