Cornbrash 
CORNBUASH : BOURX. 455 
Prof. Judd noles a number of pits about Wilsthorpe and Brace- 
borough, where the rock is for the most part coated with white 
stalagmitic carbonate of lime. At Lound, to the south-west of 
Bourn, the following section was described by him* : 
FT. IN. 
JBoulder clayTind trace of Oxford Clay (?) 3 
Laminated stone full of Ostrea flcibel- 
loides, &c. - - 9 
Soft sandy stone - - - 6 
Hard whitish stoiie crowded with fossils, 
\ Lima, &c. - - - 9 
I Light -brown sandy clay - 6 
Hard blue-hearted stone - -'16 
IJRubbly stone. 
Along the new Midland railway between Bourn and Saxby, 
the cutting by the Lound road was sloped, but I saw the Corn- 
brash west of the road, in ditches along the side of the railway. 
It consisted of tough grey limestone with Ostrca flabelloides, 
Myacitcs, &c. (See also p. 422.) 
The neighbourhood of Bourn has yielded a good many Corn- 
brash fossils, including Ammonites and Nautilus, and_ other 
species which have also been recorded from Rushden and Stilton. 
Terebratula Bentleyi was first found at Hanthorpe, to the west of 
.Morton. 
An outlier of Cornbrash (about 4 feet thick) crowns the hill 
north of Stamford, t and larger outliers occur further north : that 
at Clipsham North Wood yielded Am. macrocephalus, &c. 
Between Bourn and Folkingham the general easterly dip of 
the strata is modified by gentle undulations which have produced 
a series of iriliert 1 . Westwards there are outlying masses of 
Cornbrash, bu't the beds are largely concealed beneath a covering 
of Oxford Clay and Drift. The sections afford evidence of from 
5 to 8 feet of the strata ; ferruginous flaggy sandy and shelly lime- 
stone, and bands of clay, with at the base, beds of hard and 
compact blue limestone. Ostrea flabelloides and other common 
fossils are to be met with. Sections of the strata have been 
'observed near Edenham, Haconby, and Dunsby. At Dunsby 
the beds, noted by W. H. Holloway, consisted of sandy limestone 
and marl, resting on compact blue limestone.J 
At Quarrington the beds appear much more sandy in character. 
There was a quarry on the south side of the village, near the 
114th milestone on the London road, which showed very gritty 
limestones unlike the Cornbrash of other parts, but containing 
Ostrea flabelloides as near Cirencester. Among other fossils were 
Ammonites macrocephalus, Lima rigidula, Pecten demissus, P. 
lens, Pholadomya, and Myaeites. The stone was here quarried 
for road-metal, and the section was as follows : 
* Geol. Rutland, p. 227. 
t Sharp, Quart. Journ. Geol. Soc., vol. xxix. p. 249. 
j Jukes-Browne, Geol. S.W. Lincolnshire, pp. 69, &c. 
