Pictured below are a few I have
seen in the informal Calathium member of the Fillmore
Formation, in the southern House Range.
External mold with
filled-in siphuncle and body chamber. Alot of trilobite parts,
but no nautiloid shell...?
The body
chamber of an unidentified coiled nautiloid
An Endocerid?
A couple
of small
Orthocones surrounded with trilobite parts
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