GREAT OOLITE SERIES : BLISWORTH. 
401 
The Banded bed is similar to a layer seen at Deanshanger and 
Newport Pagnell. The details below the fossil-bed and the names 
of fossils are given from the account published by S. Sharp.* 
He records from the " Blocks," a specimen of Ammonites gracilis, 
16 in. in diameter. 
Many Saurian-remains, including bones of Cetiosaurus, were 
obtained during the construction of the railway at Blisworth.f 
At the Ironstone-pit, about a quarter of a mile N.W. of the 
Limestone-quarry at Blisworth, the following section was recorded 
by Sharp! : 
Surface soil - - 
fSof t calcareous marl 
J Hard limestone - - - - 
Great Oolite } Soft marly bed, with Ostrea Sowerbyi 
Lime&tone. j Compact marly limestone 
Soft marly limestone, with 0. Sowerbyi,, 
[ Trigonia, Modiola 
| Dark grey clay, with 0. Sowerbyi 
Upper | Ironstone-band, with 0. Sowerbyi, 
Estuarine <( Modiola imbricata, Pteroperna plana, 
Series. I Perna rugosa, var. quadrata, Natica 
[__ pyramidata 
I Variable sandy clay, with vertical 
plant-markings . 
FT. IN. 

Lower 
Estuarine 
Series. 
Goniomya hemicostata has also been recorded. 
Among the fossils from the Great Oolite of Duston, I obtained 
the following species : 
Lepidotus. 
Strophodus magnus. 
Nautilus Baberi. 
Natica formosa ? 
Yemen ili ? 
Oardium. 
Cyprina loweana. 
Gresslya? (cast). 
Isocardia ? (cast). 
Modiola bipartita. 
imbricata. 
The Great Oolite has been well exposed in several sections 
near Duston, to the west of Northampton. West of Duston 
Lodge, near Hopping Mill, a deep trench showed the following 
beds, beneath a covering of Boulder Drift : 
Ostrea Sowerbyi. 
Pecten annulatus. 
Perna rugosa. 
Pholadomya deltoidea. 
socialis (a gregarious 
form). 
Heraulti. 
Trigonia undulata. 
Tcrebratula maxillata. 
Clypeus Ploti. 
Great Oolite 
Clay. 
Great Oolite 
Limestone. 
f Dark greenish-grey clay 
< Pale marly bed - 
I Grey clay, &c., with Ostrea 
("Hard grey more or less oolitic shelly 
lime&tone, with Gasteropoda : Ostrea 
on upper surfaces of stone - 
J Seam of grey clay, with Ostrea. 
} Fossiliferous marly beds in harder and 
softer bands, blue and shaly in 
places, and occasionally oolitic 
[ Flaggy and shelly oolite - 3 or 
FT. IN. 
E 75928. 
* Quart. Journ. Geol. Soc., vol. xxvi. p. 378. 
f Owen, Proc. Geol. Soc., vol. iii. p. 460. 
J Quart. Journ. Geol. Soc., vol. xxvi. p. 379. 
c c 
