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This thing is big, much bigger than clams and brachiopods I usually find. I haven’t attempted to remove it yet, because things this size usually break up when chipped out.

 

I see shell material and some ridges in the steinkern. Excuse my clean hammer.

29D1E892-EE69-4460-B1F4-EF282D1B92D7.jpeg

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Looks to me like it could be a straight nautilus. The red marks the course of what may be the phragmocone chamber.

 

6F2609EB-BC32-4489-B278-F6D61B1A1AC6.thumb.jpeg.2a64a3592ea68a4586d6022df98051dd.thumb.jpg.368bd95a5c89bb40e922fe8181c6e47c.jpg

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58 minutes ago, Ludwigia said:

Looks to me like it could be a straight nautilus. The red marks the course of what may be the phragmocone chamber.

 

Hard to be sure but that's my first thought too.

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Fossildude19

If it is, it isn't showing any growth lines, as I would expect. 

Possibly a steinkern. 

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I’m going to attempt to at least isolate it from the rock. Should I maybe cut with the relation of the longer part of the oval or something different?

 

Planning on using a rock cutting wheel to make a rectangle and slowly chisel away other parts of the whole rock.

 

Suggestions are welcome though!

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Mark Kmiecik

I don't think it will be identifiable even if you should somehow manage to free it from the matrix. I wouldn't spend any time trying. I would just label it indet (indeterminate) and store it for further study if similar specimens are found later. Take a reference photo to keep "on file" for the same reason. The time would be better spent looking for additional specimens. Only saying what I would do. If you think you can learn something by attempting to isolate it go for it.

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Above the yellow line. I think I see a septum line.

A3DC5A19-FE2B-4DD4-8320-4AF1E61197B7.jpeg

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Mark Kmiecik

Much better photo! I see a similar structure directly above that one, although a bit more difficult to distinguish. The dark ridge at the upper right is also interesting.

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A last few photos unless I start to break this apart. As it dries it seems like I might be able to expose just a little more. It looks like the orange portion is exposed on both the left and right side in the first photo. 2nd photo is a close up of the exposed right portion and the 3rd photo is the entire rock. I do wonder what the white oval above it is. If you look closely, also, up and to the left of the specimen in the full rock there is a spired gastropod on the edge of the rock.

 

Gastropod:

68C3BAF1-9180-4A7D-B1F9-BE9B6DB9CD98.jpe

lg-ceph-001.jpeg

lg-ceph-002.jpeg

lg-ceph-003.jpeg

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  • 1 month later...

Finally broke most of this away from the rock. The shell material was three layers, with smooth sides on both the inside and outside. I have more photos, but this is what I have access to now.

742DD20C-D8AF-4FFB-9C5E-22D78FFFC979.jpeg

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Detail of the exposed shell material.

BF2FDCAD-9A96-4265-BAF1-9C38F76958BF.jpeg

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And here is my final submission on this piece. It's about as exposed as it will get. I also have Oyster as a possibility now.

 

Top (use in relation when I say left, etc)
33563231-4743-42AE-9C1D-FD6FAB42C28C.jpe

 

Top Turned 90deg
345EF268-56B4-4D08-B77B-8567435D08A7.jpe

 

Top turned 180 deg
EF17441D-85F3-46FC-A422-CD656FE3A95D.jpe

 

Top turned 135deg (this shows the ridge in the back)
B3D9E7B6-B7DB-40B4-910A-EAAF86412002.jpe

 

Same with CM scale
B9F7F6DD-90C5-4401-96DE-9E3BF0BD4FF1.jpe

 

Closer view of the ridged back, perhaps it's just layers of sediment
DE18E786-0DD2-400A-AF00-ABDB2D395909.jpe

 

Mold removed from left side showing shell layers (cm scale)
9781777C-0E69-401E-BC05-C4E0AE4F7244.jpe

 

Small piece of removed shell materials
364E4D36-1086-4CCC-8FE2-21A8CD32E068.jpe

 

Top Black and White Contrast
D94DB9D3-03FA-4622-B435-4E13F110C0AE.jpe

 

Top Isometric view Black and White Contrast
D467156E-6FB8-453F-A211-829A6C93AF23.jpe

 

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Very cool find!

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