FULLONIAN : COTTESWOLD HILLS. 245 
brown marls and clays, traversed by three or four bands of hard 
brown argillaceous rock called < clay -rag.' The uppermost of 
these is a lamellar argillaceous slate having all the characters of 
the Stonesfield Slate, and judging from the number of places 
where it occurs, would appear to be continuous over the whole 
district."* At Miserden the thickness of the beds was estimated 
at 30 feet by Witchell. 
The Fullonian formation was exposed south of Bagendon 
Church, where it consists of stiff grey clay with much " race," and 
bands of hard earthy and shelly limestone, yielding Pholadomya. 
In a cutting of the railway south of Ched worth, the junction 
with the Great Oolite was well exposed, and the following beds 
were seen (see Fig. 42, p. 128) : 
FT. IN. 
f Bubble of white oolite and marl. 
Great Oolite. \ Fine hard false-bedded oolite (= Taynton 
I Stone) - - - - 4 to 5 
f Blue and brown clay arid marl with sandy 
Stonesfield | layers and Ostrea - - -40 to 60 
Slate and ^ Impersistent bands of hard partially oolitic ~] 
Fuller's Earth. | sandy limestone, fissile and false-bedded. ^4 
[_Clay and impure fuller's earth - - J 
Here we find the blending of the Fuller's Earth and Stonesfield 
Slate, of which we have evidence from the neighbourhood of 
Lansdown near Bath, onwards to Stonesfield and Chipping Norton 
in Oxfordshire. 
Through Ched worth village, a long cutting was made in blue 
Fuller's Earth clay with beds of impure fuller's earth. On the 
south side of the tunnel the junction with the Great Oolite was 
again exposed, though not very clearly at the time of my visit, 
owing to slips. Beneath flaggy beds of oolite, and" layers of hard 
concretionary and flaggy sandy limestone (Stonesfield Slate), 
there occurred about 4 feet of clay with Ostrea acuminata, a hard 
band of white marl, and a considerable thickness of blue clay 
beneath. The entire thickness of the Fuller's Earth was shown 
further on, in a cutting west of the Barrow near the Koman Villa 
at Chedworth. For the most part it consists of blue and grey clay 
with '' race," and occasional bands of earthy limestone towards 
the base; and near its junction with the Inferior Oolite it yielded 
Ostrea acuminata, Avicula echinata, Homomya, and Pholadomya. 
The thickness was about 50 feet. 
In the railway-cuttings between Andoversford and Bourton-on- 
the- Water, fine sections of the Great Oolite and the passage 
through the Stonesfield Slate into the Fuller's Earth., have been 
exposed. The cutting north of Hampen showed the following 
section (see Fig. 43, p. 131) : 
* Quart. Journ. Geol. Soc., vol. iv.'p. 187 ; see also Lousdale, Proc. Geol. Soc., 
TO!, i. p. 414; Hull, Geol. Cheltenham, p. 51; and Brodie and Buckman, Quart. 
Journ. Geol. Soc., vol. i. p. 222. 
