560 MESSES. JUKES -BKOWNE AND W. HILL OK THE LOWER PAET 



Knowing that the base of the Chalk-marl could not be far beneath 

 the floor, a boring was made to ascertain whether it rested on 

 Gault or Red Chalk. Below is the complete section of this exposure 

 combined with the results of the boring (fig. 4) : — 



Fig. 4. — Diagram of the section shown and obtained by boring in 

 the Dersingham Parish Chalk-pit. (Scale ^ inch to 1 foot.) 



feet. 



Soil and chalk-rubble 1 



i'v—.V — h 



'III---I1L-" 



Grey Chalk. ( 



Totternhoe 

 Stone 



II — Hi- ■% \ lir 



I'!,' -=n,-=n\ — _Hi 



- il 



- il l lr-^xHI 



Chalk-marl. M 



l'! in 



J 



1 !L 



h UL 



M it 



10 



fcJDl 



Gault 



Carston 



Thin-bedded, or platy, rather hard, 

 whitish chalk 16 



Hard, tough, grey-coloured chalk in 

 massive beds, a layer of green-coated 

 nodules at its base * 2% 



Hard creamy-white chalk passing down 

 into greyer and parted by jointing into 

 massive beds 8 



Boring. 



Hard chalk, becoming grey and more 

 gritty downwards, at its base the auger 

 evidently passed through yellowish- 

 green-coated nodules (Inoceramus- 

 bed) 



White, exceedingly hard, compact lime- 

 stone (Spouge-bed of Hunstanton) ... 



Softish, greyish-white marl (dries white) 2 

 passing abruptly to 



Pale yellowish -buff material, hard and 

 compact at first, becoming softer and 

 browner, and passing gradually to . . . 2|-3 



Moderately hard, clayey marl, mostly red 

 in colour, but streaked or blotched 

 with tawny brown, a sandy vein near 

 the bottom 2-2| 



Carstone proved to 1-1^- 



The section given by Dr. Barrois of this pit is very similar to our 

 own, as follows : — 



* Represented too thick in the cut. 



