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.
a
Protocyclocerid
a small
Orthocone
a small
Orthocone, you can barely make out
traces of the phragmocone on either side
Portion
of a
large Endocerid endosiphuncle
Close-up
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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