FOREST MARBLE : CIRENCESTER. 365 
from 18 inches to 2 ft. 6 in., and, like the beds at Blue House, 
it yielded during my visit none of the distinctive species of the 
Bradford Clay. 
Again at the old quarry, known as Jarvis's quarry, on the 
Tetbury road, 2 miles from Cirencester, we have the following 
section. (See p. 282) : 
FT. IK. 
fSoil and rubbly beds of oolite - 10 
Forest Marble I Pale grey marl ... 
and < Shelly oolite 
Bradford Clay. I Grey marl with band of marly lime 
|_ stone - 
Great Oolite - Pale shelly current-bedded oolites 
2 
1 6 
3 6 
12 
Although the grey marl overlying the Great Oolite does not 
appear to be fossiliferous, there can be no doubt that it represents 
the Bradford Clay. At the quarry a short distance to the south- 
west we find only the Great Oolite to be represented ; and the 
same is the case at the Lime-kiln by the College Farm. 
In the immediate neighbourhood of Cirencester, and to the 
north and north-east, as remarked by Prof. Buckman, indications 
of the fauna of the Bradford Clay are rare. Waldheimia digona 
has been recorded by F. Bravender, from a quarry on the south 
side of the town (see p. 283), but elsewhere we find alternations of 
clays or marls with oolites, exhibiting a passage upwards from 
the Great Oolite. The clayey beds often yield Ostrea Sowerbyi 
in abundance, but they mark no constant horizon : some beds 
clearly belonging to the Great Oolite and others to the Forest 
Marble. 
While the lower portions of the Forest Marble are not always 
to be separated from the Great Oolite, the middle and upper 
divisions present the characteristic features of the formation, and 
may be readily identified. 
Along the new railway between Kemble and Tetbury, these 
beds were exposed in cuttings south-east and south-west of 
Trouble House. The sequence shown was as follows : 
FT. IN. 
["Brown clay - - - ' 1 i 
I Thin beds of limestone - - - / 
Forest Marble J g r f * ? a j/i th ^ laye j s of 1 ^ e * one 6 
| False-bedded shelly and oolitic lime- 
stone, with, seams of clay and clay- 
[ galls 12 
At Chavenage, near Tetbury, roofing-tiles have been obtained 
from the Forest Marble. The beds here, as at Poulton, occur in 
thin layers, the surfaces of which abound with specimens of 
Ostrea, Pecten, Rhynchonella, Lima, &c. all much compressed and 
distorted.* 
Lyctt, Cotteswold Hills, p. 106. 
