These cephalopods were found in
member of the Fillmore
Formation in an algal-sponge reef deposit.
The cephalopods were deposited in the reef, then the reef was
scalloped, exposing the cephalopods, then a hardground
(?algal-bacterial mat) formed (the dark
orange brown rind). No sign of the siphuncle is seen
on most of the Orthocone specimens, so positive identification cannot
be determined at
this time, but they are probably Endocerids.
Aphetoceras, a loose coiled Tarphycerid
another Aphetoceras showing the siphuncle and septa
An Orthocone showing the body chamber and part of the phragmocone
an Orthocone with closely spaced septa
| Home | Chart | Zone G-1>