OF xnio Thetys. 



Zone of Sibirites Prahluda. 



Eeds with Ceratites suhwhuffui'. 



Zone of Otoceras Woodwardi. 



8. Zone of Stephavifes .superbus. 



7. Zone of Fhminijites Flenn'vffirDU/s. 



6. Zone of Fk-minaifcs radiafvs. 



5. Zone of (krafiti-s nor,iiali!<. 



4. Zone of Proptychites trilobahis. 



3. Zone of Proptychites Lawrencianus. 



2. Zone of Gyronifes freqven.<. 



