THE LIAS MARLSTONE OF LEICESTERSHIRE. 
97 
and Messrs. Oakes and Company. In tlie course of time, no 
doubt, other large North-Midland ironmasters will be induced 
to make a venture in this very accessible and highly produc¬ 
tive ironstone region. 
From Wooistliorpe the Marlstone Rock extends by Denton 
and Harlaxton in Leicestershire to Grantham, and by Barrowby 
and Great Gonerby to Caytliorpe and Welbourn in Lincoln¬ 
shire. The escarpment due to this rock falls all the way 
from Wooistliorpe coincidently with the dip of the beds, 
coupled with a certain amount of attenuation. At Caytliorpe 
the ironstone is being extensively quarried by the West 
Yorkshire Iron Company and the Stanton Iron Company. 
Section in the Marlstone at Caytliorpe, near Grantham. 
Ft. In. 
Soil ... .. ... .. ... ... ... 5 0 
Ironstone, thinly laminated, encrinital and shelly 
beds obliquely laminated ... ... ... 1 0 
Ironstone, calcareous rock with ferruginous streaks 0 8 
Do. do. with local blue-liearted streaks 2 0 
Ironstone, with ferruginous and shelly layers in 
equal proportions ... ... ... ... 1 0 
Ironstone (good quality) ... ... ... ... 0 6 
Do. shelly ... ... ... ... ... 1 2 
Fossiliferous bed,“ jack, ’’hard blue thinly laminated 0 G 
Ferruginous ironstone to base ... ... ... 1 0 
12 10 
The ironstone at this place contains an excess of carbonate 
of lime, analysis showing Calcic carbonate 62’ 14, and Ferric 
oxide 25*71. This stone, therefore, is found valuable to mix 
with ores less rich in lime. The Bestwood Coal and Iron 
Company use it advantageously in conjunction with the more 
earthy Eastwell ironstone, and the siliceous Northamptonshire 
iron ore from Weldon. Beyond Caytliorpe the Rock-bed is 
much reduced in thickness, and its outcrop becomes very 
narrow. At Leadenliam the rock is not more than ten feet 
thick, though it still forms a feature. In the station yard at 
this place a few ferruginous flaggy beds are seen resting on 
compact sandstone. North of Leadenliam the Rock-bed 
rapidly attenuates, and it soon becomes merged in the sloping 
ground at the foot of the oolitic escarpment. Finally, the 
Marlstone thins out altogether at Welbourn, and it does not 
apparently set in again until we reach the village of Burton, 
near Lincoln, about twelve miles to the north of this place, 
and then not in a workable form. 
(To be continued.) 
