252 BRITISH AVONIAN CONODONT FAUNAS 
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Abundance factor- Lotal no of specimens Total weight of 
Total weight of sample sample in kilograms 
Fic. 65. Continuation of the lithological section of the upper part of the Seminula Zone 
in the Avon Gorge showing the abundance factor of conodonts in each sample dissolved 
in acetic acid. Samples S 22-S 30 were collected from the Great Quarry (ST 563740) 
and Samples S 31-S 50 from the riverside exposure (ST 562737). 
