Unknown tube, Richmond, Indiana

[minnbuckeye]

On Dec. 31st, I had the opportunity to stop in Richmond, Indiana on my drive from Columbus, Ohio to Plainview, Mn. It was pouring rain with occasional claps of thunder when I arrived so I had to pull into Wal-Mart and purchase an umbrella before stepping out to look at the rock hillside. The finds were many, but I am not good at IDing this tubular  "thing". There was one on each side of the rock. I did not see any more at this site. It was found in what I think is Whitewater Formation, upper Ordovician. Scaphite? Tentaculite? Tiny Cephalopod? Worm Borrow? Can anyone help to give it a name?? Thanks!!

 

Mike 

 

 

 

[Fossildude19]

I would go with small orthoconic cephalopod on these.

Scaphites only date back to the Mississippian. 

Do I see some graptolites on there as well? 

[Darktooth]

I agree with Tim. You can see how they are bigger at one end and taper down.

[Herb]

+1 for cephalopod tip

[fossilized6s]

I would lean more towards a type of Tentaculites. 

[Fossildude19]

1 hour ago, fossilized6s said:

I would lean more towards a type of Tentaculites. 

Tentaculites have ribs, though, where as these do not.   

 

[minnbuckeye]

11 hours ago, Fossildude19 said:

Tentaculites have ribs

 

@Fossildude19 Not always. I found this on line, which is why I initially leaned towards tentaculites. But obviously most tentaculites are ribbed. It is so small for a  cephalopod, which keeps doubt in my mind with the cephalopod ID.

 

.
Rekonstrukce některých významných dacryoconaridních tentakulitů
1 - Nowakia holynensis; 2 - Viriatella procera; 3 - Styliolina cf. fissurella; 4 - Viriatellina irregularis; 5 - Striatostyliolina veneaui; 6 - S. paucicostata; 7 - S. cf. striatula; 8 - N. cf. sulcata s.; 9 - N. cf. pumilio.
Převzato z Lukeše (1989) se svolením autora. 

 

 

[Fossildude19]

@minnbuckeye

 

Mike, what are the measurements of these? 

Most Styolina I have found have been 2 or 3 mm in length. 

[Manticocerasman]

could indeed be orthocone cephalopods. But we can't see suture lines, still the outer shell could be preserved. It looks like that's the case on the 1st picture, you can vagely see the outer lines of the cone.

 

[minnbuckeye]

The best one is 24mm long by 2mm at its widest. @Fossildude19

[minnbuckeye]

3 hours ago, Manticocerasman said:

could indeed be orthocone cephalopods. But we can't see suture lines, still the outer shell could be preserved.

 

 

the cross section picture shows what appears to be an "outer shell". @Manticocerasman 

 

 

[Manticocerasman]

24 minutes ago, minnbuckeye said:

 

the cross section picture shows what appears to be an "outer shell". @Manticocerasman 

 

 

Yes, that is what I ment, so it is probably an orthocone. There should also be a syphuncle, this could be the little dot in the middle, but it is a little to smal to see clearly.

[abyssunder]

Tentaculites have a bulbous end. Unfortunately, your specimen don't has the tip.