INFERIOR OOLITE: LINCOLN. 
215 
that exhibited in some of the sections near Towcester and Blia- 
worth (pp. 178, 184). Ironstone was formerly worked at Can wick, 
where 9 feet of it was noted. Indeed, according to Mr. Dalton, 
the ironstone facies of the Northampton Beds, ^xtends locally 
from Navenby to Burton-by-Lincoln. 

FIG. 60. 
Diagram- section of the Oolite plain south of Lincoln. 
(W. H. Dalton.) 
C. Great Oolite Series. 
B. Inferior Oolite. 
A. Lias. 
D D D. Line of perennial saturation, with springs at points of intersection with 
surface. 
Further north near Navenby, Hartnston, and Waddington the 
lower beds of Inferior Oolite comprise layers of oolite and 
marly, slightly oolitic, limestone, with thin bands of clay. These 
beds have been noted by Mr. Penning, in various exposures, 
to a thickness of about 20 feet. The higher beds have been 
well shown in cuttings of the railway between Dunston and 
Washingborough, and they have been opened up in quarries 
near Scopwick and Metheringham.* At Washingborough a thick- 
ness of 65 feet of stone-beds has been proved. 
The rail way -cutting north of Nocton showed the- following 
series of beds, some of which may fairly be correlated with 
certain divisions noted by Mr. Ussher to the north of Lincoln. 
A similar sequence of beds was shown in the cutting south of 
Heighington Station, and these beds were faulted to the north 
against the Great Oolite Series. 
FIG. 61. 
Section in Railway-cutting north of Nocton, Lincolnshire. 
* See Usshfr, Geol. Lincoln, pp. 45, &c. 
