GREAT OOLITE : BISLEY. 281 
of the Stonesfield Slate was found to be laminated, and split up 
on exposure like the true roofing-tile."* 
At Througham Field, north-east of Bisley, and south of 
Througham or Druffham, we find quarries opened for the working 
of Stonesfield or Bisley Slates. The Stonesfield Slate series is 
overlaid by 10 feet of current-bedded oolite, which is quarried for 
building-stone, for wall-stone, and for road-metal. The details of 
the underlying beds vary very much, but the following section 
noted in Mr. Freeman's quarry (in company with J. H. Taunton), 
affords a good example of the series : there the oolitic freestone is 
not seen : 
Soil. FT. IN. 
"Oolitic sandy stone, yielding the best 
" slate/' but now for the most part 
worked away - - - - 2 6 
Calcareous sandstone, used for wall- 
stone and yoad-metal - -"] 
Soft calcareous sandstone with scattered f 
oolitic grains - - - - > 4 6 
Hard calcareous sandstone : building- I 
Slonesfield j stone - -J 
Slate. 1 Fissile sandy beds - 2 6 
Hard irregular earthy sandstone, ob- 
scurely oolitic ; with fossils 1 2 to 2 
Fissile micaceous sandstone with Tri- 
gonia impressa. Slate Bed. The top 
4 in. will never split ; the next 9 in. 
forms good slate ; the lower part is 
not so good - - - 2 
(JFissile sandy beds - - 1 6 
Fullonian - Clay. 
The te slate " does not exhibit planes of division in the quarry. 
It is never more than 18 inches thick, and this occurs at slightly 
different horizons. 
Stone tiles or " Slates " have also been obtained from Miserden 
(Miserdine), Rendcomb, and Nettlecomb near Birdlip ; and 
Prof. Hull states that they have been worked on the north-east 
side of Oakridge Common and at Battlescomb, east of Bisley. f 
In quarries north-west of Queen Anne's Monument in Oakley 
Park, Cirencester, and by the four-mile Lodge near Sapperton, 
there were exposed about 12 feet of false-bedded oolite and shelly 
rag with an occasional marly layer, containing Ostrea, &c. The 
beds probably belong to the upper division (Kemble Beds) of 
the Great Oolite. Lower beds were to be seen at Dean's Quarry 
on the Stroud or Minchinhampton road, 3 miles from Cirencester, 
where the following section was exposed : 
FT. 
Iv. 
fPale oolites .... 
3 

J Bubbly and sandy marl and tough 
Great Oolite 
oolite [Echinobrissus] 
1 
6 
(Upper Division). 
^ Compact limestone, oolitic, with irregu- 
lar cavities like Dagham Stone 
2 
4 
1 White oolite and coral-limestones, 
(_ false-bedded ... 
6 

* Proc. Cotteswold Club, vol. vii. p. 117. 
t Geol. parts Wilts and Gloucestershire, p. 13 ; Geol. Cheltenham, p. 60 ; Lycett, 
Cotteswold Hills, p. 100. 
