on see _ 
‘ L Ieas ae Ly 
— a a 
er es ee KATATA NA 
80 ° 5 10 5 20 
Abundance factor = Total no of specimens_ Total weight of sample 
Total weight of sample in kilograms 
Fic. 63. Lithological section of the Upper Caninia Zone in the Avon Gorge showing the 
abundance factor of conodonts in each sample dissolved in acetic acid. Samples were 
collected from the roadside exposure (ST 562746). 
