cephalopod mold?

[grg1109]

This is a "mud mold" that I found in the creek near King Ferry, NY.  Approx. 8 inches long.  I've been told its a cephalopod.

Thanks

Greg

[Tidgy's Dad]

I would expect to see some sign of the septa if this were an internal mould of a nautiloid. 

I'm not sure what it is, but looking at the surface of the rest of the rock, perhaps it's a burrow infill? 

[grg1109]

Better photos of Top and sides

[JimB88]

thats a trace fossil of some sort..

[Fossildude19]

I agree - not a cephalopod, and belemnites came later.  

[Rockwood]

I see more indications against it being a burrow than for. I think a somewhat solid object (a clay lens would do) was in place at the time the sediments were deposited. 

[grg1109]

6 minutes ago, Rockwood said:

I think a somewhat solid object (a clay lens would do) was in place at the time the sediments were deposited. 

?

[Rockwood]

discontiuity