396 
LOWER OOLITIC ROCKS OF ENGLAND : 
The Great Oolite Limestone has been worked in several 
places, near Kempston, and between Bromhani and Stagsden. At 
the Stagsden quarry I noted the following section, also in company 
with Mr. Topley and Mr. Cameron : 
Kellaways 
Beds. 
FT. IN. 
Cornbrash 
Great 
Oolite Clay. 
Great Oolite 
Limestone, j 
JGlay. 
/Tough grey limestone, in impersistent 
"\ masses: Ostrea fidbelloides, &c. 
' Brown, blue, and greenish clays, cal- 
careous in places, and with nodular 
ironstone-band near base - 4 
"Pale marly and rubbly bed (like top-bed 
at Cox's pit) - - - 2 6 
Pale earthy and shelly limestones, false- 
bedded - - - - - 1 3 
Irregular band of earthy limestone, cur- 
rent-bedded: crowded ATith specimens 
of Ostrea Sowerbyi - 9 
Earthy and marly clay - - 10 
Pale oolitic limestone. 0. Sowerbyi, 10 
[ Clayey marl, greenish-grey and mottled. 
The Great Oolite limestone is quarried for lime-burning and for 
building-stone. Where, thickly covered by clayey beds, it is blue hearted 
and less divided than at the northern end of the quarry, where it comes to 
the surface. 
At the brickyard three-quarters of a mile N.N.W. of West 
End, Sterington, the Cornbrash rests on bluish oolitic limestone, 
with apparently no Great Oolite Clay. 
North of Olney, the workings at the Warrington stone-pit and 
lime-kiln, showed the following section : 
FT. IN. 
Great Oolite / Brown clay - - -10 to 20 
Clay. 1 Marly clay - - - - 1 
"Pale fissile limestones - - - 1 
Pale rubbly and earthy limestone and 
clay - 5 
Banded marly limestone - - -~| 
Fissile beds : dense limestone with I K Q 
scattered oolite grains - - | 
Hard oolitic limestone, with marly galls- J 
False-bedded oolitic and shelly beds 4 6 to 5 
Calcareous sandy beds - - 2 
Hard limestone - - 1 
Calcareous sandstone - - 1 
^ Poor stone (not seen) - i - 3 
Water (? Upper Estuarine clay). 
Building-blocks are obtained from the lower beds of stone. 
The beds on the whole are irregular and more or less oolitic, 
and sandy towards the base. Among the fossils collected by 
Mr. Cameron and myself, were Ostrea, Pccten annulatus, Lima 
cardiiformis, Modiola, Tcrebratula maxillata, and Echmobrissus.l 
A great many fossils, including Pecten icollastonensis, were 
obtained by the Rev. A. W. Griesbach, from the Great Oolite 
of Wollaston ; and it is noteworthy that Waldheimia digona was 
there found in some abundance :* a fossil suggestive of the 
Bradfordian horizon. 
Great Oolite 
Limestone. 
* See Morris, Geol. Mag. 1869, p. 102. 
