262 LOWER OOLITIC BOCKS OF ENGLAND : 
minute Gasteropods were obtained (from bed No. 5) by Lonsdale, 
and also by the Rev. George Cookson (who formerly resided at 
Westwood). These included t ' species of Cylindrites (Actteoji), 
Neridomus, Nerita, Pileolus, and Rissoina (Rissoa). In Mr. 
Hudleston's opinion, some of the forms described by Sowerby 
might be regarded as immature. The average length of the 
specimens is about 3 mm. Attention has recently been directed 
to the fossil-beds by Mr. W. H. Wickes. 
To the south of Bradford-on-Avon we find sections showing 
the Bradford Clay, overlying the Great Oolite. 
At the Lime-kiln on the east side of the Frome road,* and in 
another quarry on the slope of the hill to the north-east, the top 
bed of the Great Oolite, where it is protected by the covering of 
Bradford Clay, is a hard brown oolitic limestone. This, together 
with beds of coarser oolite beneath, are about 10 feet thick; 
below comes the Bag Bed which forms the roof of the mines, a 
hard band, about 2 or 3 feet thick, which overlies the Freestone. 
The Freestone is 6 or 7 feet thick, and is obliquely bedded at the 
Lime-kiln quarry, so that it does not afford so serviceable a 
building-stone as it does elsewhere. 
Old quarries on the eastern side of Bradford-on-Avon, and to 
the south of the Melksham road, show also the connexion with 
the Bradford Clay, as follows : 
Fx. IK. 
Bradford Clay - Pale-grey marly clay with "race," 
Avicula costata, Ostrea lingulata, 
Rhynclkonella concinna, Waldheimia 
digona, ApiocrinusParkinsoni, &c. 
fShelly oolite with marly patches : 
minutely false-bedded 1 
Marly layer - - - - 4 
O J Upper Division. <^ False-bedded shelly oolite, with 
Ostrea, Pecten, Rhynchonella, 
Polyzoa, Corals - - - 11 
(_EagBeds - - - - 3 
Lower Division Freestone: false-bedded buff oolite 7 
The thickness of the Great Oolite from the base of the Brad- 
ford Clay down to the top of the Freestone, varies in this neigh- 
bourhood from about 13 to over 27 feet. The beds are much 
thinner at the lime-kiln south of Bradford-on-Avon than at 
LTpper Westwood. 
Alurrel (or Murhill) quarry near Winsley, about 1 mile west 
of Bradford, was described long ago by Lonsdalef : in the accom- 
panying section, the details of the Lower Division are given on 
his authority ; and those of the Upper Division on the authority 
of Mr. Wickes : 
* See also Lonsdale, Trans. Geol. Soc., ser. 2, vol. iii. p. 25 . 
f Abbreviated from Lonsdale, Trans. Geol. Soc., ser. 2, vol. iii. p. 253. See also 
J. C. Pearce, Proc. Geol. Soc., vol. i. p. 484. 
