Showpiece Fossilized Rock Need Ids Please

[Bev]

Hi Guys and Gals!

Just found this today--Nov. 18, 2012--this will be the showpiece of my collection so far! It is 17 inches tall and 6 inches wide. Dolomite of the Stewartville member of the Galena Formation, Ordovician. Fillmore County, MN. The same quarry as I posted on the Fossil Hunting Trips forum last week or so.

I recognize 3 Maclurites and a cephalopod at the top.

This is what I am a little confused on. Could be a gastropod? Could be a coiled ceph? Maybe one piece of crinoid?

I am going to have to do a reply to add more pics because I am out of room

[Bev]

So, this is the edge of those "rings".

I beleive this to be another ceph, maybe, buried in matrix.

So far, all I have done is wash the piece off.

And this is a shot of the edge of same...

Any idea other than a ceph?

Thank you so much for taking a look. I truly appreciate any ideas you may have.

Beautiful rock though! Shame one of the macs is broken but the color, size and clustering of fossils is truly unique!

Thank you ahead of time for your help!

Bev

[ghost1066]

The spiral looks to me like an internal casting of a gastropod. Not sure if your other one is another cephalopod or not just too much in the way for me. Nice find.

[Bev]

An internal casting, aye. THANKS!

[BobWill]

Agree. Gastropod. Mostly because the whorls coil in a spire, or moving plane. Cephs of the Ordovician were either straight or coiled flat, in a stationary plane. The last picture looks like gastropod too for the same reason if I'm seeing it right.