BRITISH AVONIAN CONODONT FAUNAS 
7 
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Rp eRe gl pepe apap ap dpaphp Ap l gpl Appear er ep arene ty APL 
Abarar er enU eG Cte URAC pee eee ec near EGG 
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Abundancefactor = Total no.of specimens 
Total weight of sample 
Fic. 60. Lithological section of the Lower and Upper Zaphrentis Zone in the Avon Gorge 
showing the abundance factor of conodonts in each sample, and the total weight of each 
sample dissolved in acetic acid. Samples Z 1-Z ro were collected in Quarry 1 (ST 557745), 
Samples Z 11—Z 20 were collected in the Black Rock Quarry (ST 561747) and Samples 
Z 21-Z 33 were collected in Quarry 2 (ST 561747). 
Total weight of 
mple in kilograms 
247 
