214 LOTIER OOLITIC ROCKS OF ENGLAND: 
fFlaggy oolite, stained red in places. 
I Massive beds of oolite, coarse-grained in places and 
Lincolnshire J shelly. 
Limestone. "\ Tough grey shelly and oolitic limestone splitting 
irregularly. 
(_ White oolite. 
Ancaster Hall was built from stone obtained at the Castle Quarriea 
(Wilsford stone) now disused. 
The Grey lees pits, west of Sleaford, show about 15 feet of 
remarkably false-bedded shelly oolite, with Ostrea and shell- 
fragments ; beds that recall the shelly beds at Ponton. At Bully 
Wells there is a large quarry and lirne-kiln ; the upper beds com- 
prise fissile false-bedded oolites, and these rest on hard blue- 
hearted oolitic and shelly limestone, like beds seen at Washing- 
borough, near Lincoln. They contain Galeolaria (Serpula) socialis> 
as at Glendon and other localities. 
Sleaford to Lincoln. 
At South Rauceby, south of the village and east of the road, 
a quarry showed about 16 feet of oolite. There is no clay 
covering, and the top-beds which are false-bedded, split into thin 
slabs ; these pass down irregularly into false-bedded freestone, 
with more solid beds at the base. Building-blocks are obtained. 
In the Fenland area, the evidence of a well-section at Parson 
Drove, Pinchbeck North Fen, to the north-west of Spalding, 
indicated the presence of 82 feet of rock, which may be assigned 
to the Inferior Oolite, beneath the Great Oolite Series, &c.* 
Northwards, in the deep boring at Woodhall Spa, Mr. Jukes- 
Browne has estimated the thickness of Lincolnshire Limestone 
and Northampton Sand at 140 f'eet.f 
The lower beds of the Inferior Oolite have been quarried in 
various places along the escarpment east of Caythorpe, Fulbeck, 
and Leadenham. They consist of oolitic limestones, coarse and 
shelly in places, and sometimes pisolitic, together with compact 
limestone and sandy limestone. 
The Basement Beds comprising representatives of Northampton 
Sand and Lower Estuarine Series, are not well-exposed along 
this escarpment; but northwards, at Coleby, they consist of ferru- 
ginous sandy beds, with ironstone-nodules and clay -partings, 
having n thickness of 10 feet. Coprolites are said to occur at the 
base. In this neighbourhood and also to the north of Waddington, 
the ironstone has been worked. At Coleby the richer bands 
contain as much as much as 40 per cent, of iron.J 
At Waddington, Mr. W. H. Penning noticed an interrupted 
band of ironstone, or ferruginous septaria, near the top of the blue 
clay (Upper Lias) that underlies the mass of concretionary iron- 
stone (Northampton Sand). This feature may be compared with 
* Jukes-Browne, Geol. S.W. Lincolnshire, p. 152. 
f Geol. Lincoln, p. 208. 
Capt. Macdakin, Geol. Mag., 1877, p. 406 ; Geol. Lincoln, p. 87. . 
Ussher, Geol. Lincoln, p. 38, 89. 
