Ibexian Series, Blackhillsian Stage
Zone J Cephalopods
The fossils in the top 3 photos were found on a hardground, probably in
the Wah Wah Limestone in a fault block in the northern end of Tule
Valley near Skull Rock Pass. the bottom
3 were found in algal-sponge reef deposits. Because endocerids
are so rare in the Wah Wah, these may be from the Juab Limestone, Zone
L, in the same or another fault block.
Orthocone, you can barely make out
traces of the phragmocone on either side
large Endocerid endosiphuncle
of the photo above showing a portion of the phragmocone
hard to see, just below the hammer, a large phragmocone with a very
large space for the siphuncle.
to the right is an endosiphuncle from an endocone.
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