INFERIOR OOLITE SERIES ! MENDIP HILLS. 91 
Limestone, and occasionally pierced by borers, may readily be 
seen."* 
FIG. 38. 
Section showing overlap in the Jurassic Beds along the eastern 
borders of the Mendip Hills. (After De la Beche.) 
t. Fuller's Earth Kock. e. Lias. 
A. /. Lower Fuller's Earth Clay. d. Dolomitic Conglomerate. 
g. Inferior Oolite overlapping the Mid- c. Carboniferous Limestone. 
ford Sand, and extending on to b. Lower Limestone Shales. 
the older rocks at m and n. c. Old Red Sandstone. 
/. MidfordSand. 
Fossils on the whole are not abundant in the Inferior Oolite of 
this neighbourhood. I have obtained Nautilus, Astarte, Lima 
pectiniformis, Trigonia, Placunopsis, Rhynchonella, and Terebratula 
maxillata. Mr. Hudleston observes, " The well known section at 
Vallis, where something like 15 feet of Inferior Oolite rests on 
the Carboniferous Limestone, seems to show that only beds of the 
age of the Clypeus-gr\i were deposited upon the old ridge at 
that spot."f In places the Rhaetic Beds occur beneath the Inferior 
Oolite as at Vallis Bottom. 
FIG. 39. 
Section near the Bridge at Murdercombe, near Frame (De la 
Beche.) 
a. Inferior Oolite. 
6. Arenaceous parting. 
c. Carboniferous Limestone. 
* Mem. Geol. Survey, vol. i. p. 289. 
f Inf. Ool. Gasteropoda, p. 54. 
