COBNBEASH: CHIPPENHAM. 441 
sunk for the Melksham Spa Co. in 1815.* (See p. 514.) There 
are shallow quarries north-east of Thingley, near Corsham, where 
flaggy beds are broken up for local road-mending. Avicula 
echinata is abundant on some of the slabs, but fossils are scarce. 
The same is the case in the quarries about a mile west of Chip- 
penham, and in those near Hardenhuish, though Grcsslya and 
Myacites are fairly common. 
East of Biddestone, and about half-way between the village 
and Starveall Farm, the junction with the Forest Marble was 
shown in a road-cutting, which I visited in company with the 
Rev. H. H. Winwood. The section was as follows : 
FT. IK. 
f Bubbly limestone, with Trigonia. 
Cornbrash - 4 Bubbly yellow marl, with Terebratula 
I intermedia. 
{Greenish-grey clay with "race," and 
band of thin shelly limestone with 
Ostrea : shown to depth of 4 6 
An adjoining quarry on the north-east, showed higher beds of 
Cornbrash, yielding Cypricardia caudata, Lima duplicata, Mya- 
cites securiformis , Terebratula maxillata, Waldhelmia obovata, and 
Serpula intestinalis. Pygaster Morrisi was found by Prof. Hull 
in the C/prnbrash near Folly Farm, Corsham. 
To the north-west of Lower Stanton, near the 6th milestone 
south of Corston, there is a small quarry in the Cornbrash, and 
a brickyard in the lower beds of the Oxfordian, where red and 
bluish mottled bricks and tiles are manufactured. The section 
was as follows : 
FT. IN. 
"Blue and brown mottled clay with 
"race " and selenite : passing down 
into beds below - - 2 
Kellaways 
Beds. 
Laminated loamy clay and sand, with 
crushed specimens of Waldheimia 
obovata ?, Khynchonella varians, 
Myacites, Ostrea, Serpula vertebralis- 1 6 
"Hard bluish shelly and marly lime- 
stone with many fossils : Strophodus, 
Area, Avicula echinata, Lima dupli- 
cata, Modiola Lonsdalei, Ostrea 
Combrash -? costata, Pecten vagans, P. demissus, 
Terebratula intermedia, Waldheimia 
obovata, Acrosalenia, Echinobrissus 
clunicularis, Pygurus Michelini, 
Serpula deplexa 4 
There is an abrupt change at the junction of the Cornbrash 
and Oxfordian beds, while the limestones of the Cornbrash have 
been subsequently eroded by springs, and the overlying clay has 
been washed down into hollow?. The junction above noted, 
corresponds with that seen at Eodden near Wey mouth, and near 
Sutton Bingham. 
* H. B. W., Quart. Journ. Geol. Soc., vol. xlii. p. 301. 
