Geisoniceras sp.
Matrix free Othocone showing numerous chambers. At some point after death the thinner end of the shell ruptured and two of the chambers partially separated. Current action on the sea bed then drifted the lighter section to one side. Burial followed before the two sections parted completely. Interesting piece.
Middle Devonian, Eifelian.
Alnif, Morocco.
Specimen : 9 cm. long.
