Pictured below (naturally sectioned) are a few I have seen on top of a ledge of the Juab Limestone around Fossil Mt. in the Ibex area.
See Fossil Mountain Here
This specimen is 65mm long
sp., this specimen is 104mm diameter a Tarphycerid
notice the dorsal location of the siphuncle
an Endocerid, the endocones in the very wide siphuncle are replaced with sparry calcite.
< Zone J | Home | Chart | Zone N>