BRITISH AVONIAN CONODONT FAUNAS 263 
+ —  YOREDALE GROUP ——» 
f 
Abundance factor= Lotal no-of specimens _ Total weight of 
Total weight of sample sample in 
kilograms. 
Fic. 77. Composite lithological section through the Yoredale Group (base of Simonstone 
Limestone to the top of the Five Yard Limestone inclusive) in the Snaizeholme—Hawes 
area (34/815840). S. Ls.=Simonstone Limestone : F.Y. Ls.=Five Yard Limestone. 
° 5 10 15 
g 
GROUP 
Ww 
=) 
< 
(2) 
uw 
a 
oO 
> 
| COVERED 
‘Abundance factor= Total no. of specimens Total weight of sample 
Total weight of sample in kilograms. 
Fic. 78. Composite lithological section through the Yoredale Group (top of the Five 
Yard Limestone to the top of the Underset Limestone inclusive) in the Snaizeholme— 
Hawes area (34/815840). TIT. Y. Ls.=Three Yard Limestone: U. Ls.=Underset 
Limestone. 
