It may have something to do with the paleoenvironment. Soft muddy bottom sediments below storm wave base may be able to preserve stuff like this better than, say, an area where storm waves mix the remains of more organisms together.
The first two look like MacluritesTerri;177348 said:
DWhatley;177379 said:This one (397) looks really interesting. I hope Kevin can ID it.
The first two look like Maclurites
This one (397) looks really interesting. I hope Kevin can ID it.
Is the last one planispiral? I can see no sign of any septa, and if it is planispiral, it is too involute for an Ordovician coiled nautiloid, maybe a Bellerophontid??? Cool to see all those little worm trails in the mold.
Possibly part of the aperture ?Terri;177410 said:On the second one I was wondering about the area at the bottom just left of center that kind of branches to the left, is that part of the gastropod, and if it is, what part?
Terri;177411 said:I think it is planispiral, but I need a lesson here, I have the definition but am not sure I know how to apply it, can you show an example with another fossil?