Chicago Rock and Mineral Society - 70th Annual Silent Auction

[Nimravis]

Tonight I decided to stop by the Chicago Rock and Mineral Societies 70th Annual Silent Auction which ran from 6pm - 9pm. This was the first time that I have attended this event and since it was a rainy night and only 40 miles from home I figured I stop by to see what they had.

 

Here are a couple pics of the event-

 

 

 

Most people were interested in the Rocks and Minerals and not the few fossils that were offered, and I hate seeing fossils up for auction and no one bidding, so I did and picked up a couple items that I did not need.

 

This first piece is from Mazon Creek and I do love bark, so I got this piece for $3.00- Calamites bark with a great cross section of an internode.

 

 

Here are 3 pieces of Pennsylvanian black shale that contain Shark Spines- these are from Illinois and I forget which Pit they come from and they only cot 50 cents each.

 

 

I definitely did not need this next flat of  Upper Ordovician Isorthoceras sociale cephalopods, but I could not just let them sit there without anyone putting down the starting bid of $1.00. I wrote down $1.00 and this was the last table to close and no one raised it, so I brought them home. I was planning on collecting from this site again this year after the MAPS Show.

 

 

These two larger pieces of Turritella Agate from I believe Wyoming were a good price at $2.00 each- one slab is natural and the other slab is cut and polished on both sides.

 

 

I also picked up these 5 echinoids and 1 gastropod that were supposed to have been collected in July of 1967 in Salenia, Texas- I picked these pieces up for 50 cents each.

 

 

 

Here are a bunch of brachiopods and 1 horn coral that I got for a few dollars, but I do not have a location or age on these, If someone can help out it would be appreciated @Tidgy's Dad @Peat Burns- I believe that they are all from the same location. I’m thinking maybe Devonian from New York or Ohio?

 

 

Here is a small trilobite that may be complete within the matrix- unknown location. I picked this up for 50 cents as well as this other piece with multiple brachiopods, believe it maybe Ordovician Sowerbyella rugosa.

 

 

All in all, it was a good time and I helped them get rid of some stuff that they did not have to pack up and take back.

[Praefectus]

Nice haul. I like the trilobite. He is just peeking out of the rock.

[Tidgy's Dad]

Maybe Ohio Devonian with Stropheodonta demissa, Atrypa, Mucrospirifer and Orthospirifer? 

But i'm still learning these area, maybe Penn Dixie or even Hungry Hollow. 

Super bargains, Ralph, a lot of quite decent stuff for next to nothing. 

[Nimravis]

6 hours ago, Tidgy's Dad said:

Maybe Ohio Devonian with Stropheodonta demissa, Atrypa, Mucrospirifer and Orthospirifer? 

But i'm still learning these area, maybe Penn Dixie or even Hungry Hollow. 

Super bargains, Ralph, a lot of quite decent stuff for next to nothing. 

Thanks Adam, it was something to do on a rainy night.

[stats]

You got some great deals!  I was thinking of going to the show, but totally forgot about it.

 

Cheers,

Rich

 

[Nimravis]

47 minutes ago, stats said:

You got some great deals!  I was thinking of going to the show, but totally forgot about it.

 

Cheers,

Rich

 

It was fun and gave me something to do.

[Nimravis]

I did a 5 minute pre job on the trilobite and her what was hidden in the matrix.

 

 

Not complete, but still cute-

 

[Tidgy's Dad]

Rather sweet.

[Peat Burns]

On 3/10/2019 at 12:05 AM, Nimravis said:

Here are a bunch of brachiopods and 1 horn coral that I got for a few dollars, but I do not have a location or age on these, If someone can help out it would be appreciated

 

The two circled below are Paraspirifer bownockeri. The other big ones may be also.  I'd have to have a better look.  Their presence makes the collecting locale to be more likely Sylvania, OH.  That is the only exposure of the Silica that I know of where these were common / abundant .

 

The others are the typical Mucrospirifer sp(p).

 

Highway robbery on your acquisitions 

 

EDIT: I just saw your scale cube.  That would be some tiny Paraspirifer bownockeri... but that's what they look like to me.  However their small size does bring that ID into question.

[Tidgy's Dad]

 

11 minutes ago, Peat Burns said:

 

EDIT: I just saw your scale cube.  That would be some tiny Paraspirifer bownockeri... but that's what they look like to me.  However there small size does bring that ID into question.

Orthospirifer cooperi, perhaps? 

[jpc]

The Turritella agate is indeed from Wyoming.  

[Nimravis]

Thanks Tony @Peat Burns appreciate the help.

[Peat Burns]

1 hour ago, Tidgy's Dad said:

 

Orthospirifer cooperi, perhaps? 

 maybe, but the sulcus looks a little too Broad and shallow, and the fold on the one is nearly wedge-like, much like Paraspirifer bownockeri.  Need photos from different angles, and a close up of the fold and sulcus so that we can see the surface ornamentation. Paraspirifer as fine chevrons on the fold parallel with the commissure.  O. cooperi has fine striae  parallel with the plications

[Nimravis]

@Peat Burns and @Tidgy's Dad I will shoot a couple better pics for you.

 

 Thanks 

[Nimravis]

@Peat Burns and @Tidgy's Dad I hope that these are better- Here are the first four.

 

 

 

 

 

 

 

 

 

 

 

 

[Nimravis]

4 more-

 

 

 

 

 

 

 

 

 

 

[Tidgy's Dad]

5 minutes ago, Nimravis said:

@Peat Burns and @Tidgy's Dad I hope that these are better- Here are the first four.

 

 

These are Mucrospirifer, I think we are agreed on these. 

Lovely, though.

[Tidgy's Dad]

5 minutes ago, Nimravis said:

4 more-

 

 

 

 

 

 

 

 

 

 

The third, fourth and i think the last photo are Stropheodonta demissa and 5 and 6 are Atrypa. Again, i think we agree.

But it's the one at the top, the first couple of photos here, the ones circled in red by Tony that we are not sure about. 

Lovely.

[Peat Burns]

With the new photos, I believe the ones in question are in fact Orthospirifer cooperi as Adam surmised. I can see fine costae (capillae) on the fold, parallel with plications. It's amazing how things can look so differently from one photo to another. None of these seem to have the tall, acute fold like what I thought I was seeing on the original photos. (Maybe it was wishful thinking, as I love Paraspirifer bownockeri. My absolute favorite brachiopod )