208 
THE CRETACEOUS ROCKS OF BRITAIN. 
Quarry. 
ft 
Soil and gravel about 4 
I rd whitish chalk passing down into greyish bedded 
chalk.12 
Tough grey randy-looking chalk, becoming harder 
below and containing many yellowish phosphatic 
nodules at the base (Totternhoe Stone) • - * 4 
Band of mottled grey and white chalk 1 
Hard whitish chalk, without definite bed Ung, weather¬ 
ing to a rough lumpy surface with a yello.vish tinge- 22 
Boring. 
Rubble of broken chalk - 
Hard greyish shelly chalk, with interbedded softer 
| layers.14 
The like with buff stains or blotches, hardest in the 
v lower three feet.12 
Softer chalk grey and marly, mottled with paler bluish- 
grey material.2 
Hard light luff chalk, shelly, with black streaks 
(? oxide of manganese), p ssing dowui into less hard 
and less shelly dull grey chalk - - - - 10 
Soft whitish marl, with a harder lump here and there, 
but mostly cutting like cheese.11 
/"Tough grey sandy marl with yellowish streaks, con- 
-J tabling glauconite gra ns and small phcsphate- 
p nodules.2J 
Stiff dark blue clay.i roved to l£ 
97 
Pig. 49. —The succession shown in the quarry and boring at Stoke Ferry. 
Scale, 20 feet to an inch. 
(From Memoir “On the Geology of S.W. Norfolk and Northern Cam¬ 
bridgeshire ,J (1S9S), p. 31.) 
