INFERIOR OOLITE : KETTERING. 
191 
Northampton 
Sand. 
f Ironstone - - - 6 to 
< Hard red rock, with greenish centres 
t (rock used for building-purposes) 
FIG. 53. 
FT. 
IN. 

20 seen 
Section at Old Head Wood, north-east of Kettering, Northampton- 
shire (Prof. J. W. Judd). 
a. Soil. 
h. Gravelly Drift. 
c. Light-blue estuarine clays. 
d. White marly clays. 
e. Ironstone junction-band. 
rock. 
Upper Estuarine Series. 
The Lower Estuarine Beds in the neighbourhood of Rockingham 
and Gretton, are from 10 to 15 feet thick, and the ironstone 
beneath them is largely worked at Gretton. 
At Great Weldon the Lincolnshire Limestone has long been 
quarried, and many " hills and holes " remain to show the 
extent of the old excavations. I visited this locality in company 
with Mr. Beeby Thompson. The stone is now worked at quarries 
belonging to the Earl of Winchilsea and Nottingham. 
The following section down to the base of the freestones was 
exhibited : 
FT. I*. 
{Clay, with fragments of limestone, &c., 
resting on irregular and "piped" 
surface of beds below - --16 
"Eubbly and decomposed rock - - 2 
Fissile limestone - - 1 
False-bedded oolitic limestones with 
rolled fragments : cavernous in 
places. (These and overlying beds 
are not utilized) - -7.0 
Soil 
