370 
LOWER OOLITIC ROCKS OF ENGLAND : 
Soil - - . - . 
i Clays with occasional tbin bands of 
stone - 
Blue-hearted oolitic limestone and 
greenisb clay, of variable thickness - 
False-bedded oolitic limestones, with 
clay-galls, and seams of clay - 
FT. 
1 
IN. 

12 
The beds are very irregular, the top clays appearing to scoop 
iiito the limestones, the result probably of irregular accumulation. 
Westwards the clays thicken at the expense of the limestone, for 
we find no conspicuous development of stone-beds in passing 
across the outcrop of the Forest Marble towards Honeycomb 
Leaze. In this area the famous Fairford Coral-bed was discovered, 
and referred by some to the Cornbrash, by others to the base of 
the Forest Marble (Bradford Clay). It belongs in my opinion to 
the top of the Great Oolite. (See p. 297) 
FIG. 107. 
Section at Poulton, near Fairford. 
2. Soil. 
1 . Forest Marble : quarried for " Slates." 
Some of the fissile and obliquely-bedded masses of shelly and 
oolitic limestone are quarried for "slates" and "planking," south 
of Burford Signett and east of Ilolwell. The details vary in each 
opening. The stone-beds alternate with grey racy clays, and are 
exposed to a depth of from 6 to 12 feet. Some ot the limestones 
are largely composed of spines of Echini, fragments as well as 
entire specimens of Ostrea, and fragments of Rhynchonella, 
together with lignite. From these beds I obtained some 
Gasteropods, and the following fossils : 
Lima cardiiformis. 
Modiola imbricata. 
Ostrea Sowerbyi (very abun- 
dant). 
Pecten anmilatne. 
Pecten lens. 
vagans. 
Rhynchoiiella. 
Serpula. 
Acrosalenia ? 
Other sections near Aldsworth and Bibury, have been described 
by Prof. Hull, who notices at the former locality the abundance of 
