big brook finds today help please coprolite? others

[brad hinkelman]

[The Jersey Devil]

The pic of the inside makes me think that it is a concretion/something man-made.

[The Jersey Devil]

5 hours ago, Max-fossils said:

How can you tell the species from such a small fragment? Just curious...

 

Hi Max,

Well, the two most common crustaceans in the area are the ghost shrimp Mesostylus mortoni and the lobster Hoploparia gabbi, so it was easy to narrow down the ID because of the shape and bumps on the arm segment's surface.

[brad hinkelman]

12 minutes ago, josephstrizhak said:

The pic of the inside makes me think that it is a concretion/something man-made.

I'm thinking the same at this point.....thanks

[ynot]

Looking closer at picture 2 it does look like it has a spiral ridge. If it is a screw that has completely oxidized it may have lost its magnetism.

[Max-fossils]

10 hours ago, josephstrizhak said:

 

Hi Max,

Well, the two most common crustaceans in the area are the ghost shrimp Mesostylus mortoni and the lobster Hoploparia gabbi, so it was easy to narrow down the ID because of the shape and bumps on the arm segment's surface.

Aha. Thanks for the clarification 

[Rockwood]

10 hours ago, ynot said:

Looking closer at picture 2 it does look like it has a spiral ridge. If it is a screw that has completely oxidized it may have lost its magnetism.

I noticed the spiral too, but the taper seems irregular for a screw. Perhaps it's a better match for some of the metal shavings made in a machine shop ?

[GeschWhat]

Sorry, I'm coming in late. The first photo is indeed a spiral coprolite. it is pretty typical of those I've seen from that area. Nice!

[erose]

I'd put good money on number two being a rusted crew. The rest of the IDs are solid.

[abyssunder]

Comparing these images I'm pretty sure that the specimen in question is man-made.

 

[abyssunder]

On 1/29/2018 at 1:16 AM, josephstrizhak said:

The pic of the inside makes me think that it is a concretion/something man-made.

Sorry, I'm seeing late your post, but I think you are correct. That was my thought, also.

[Carl]

Just catching up and haven't yet read through the whole thread but I agree 100% that the first one is a fish coprolite, the second is probably the spiral of metal formed when drilling a hole in metal (I've seen these out there before), and the last is a segment of the arm of a ghost shrimp.

[Rockwood]

On 1/29/2018 at 1:46 PM, erose said:

I'd put good money on number two being a rusted crew. 

Now I wish I had taken you up on that.