OF THE UPPER CRETACEOUS IN" WEST SUFFOLK AND NORFOLK. 561 



feet. 



Compact whitish or greyish marly chalk with many fossils ... 12 



Hard chalk with layer of nodules at base 3 



Hard white ch alk 1 ^ 



Hard greyish-white chalk, rather sandy 9 



If the above section is compared with that of the Hunstanton 

 cliff on page 562, the analogy between them is seen to be very 

 striking. In both cases we have the same descending order of 

 succession, viz. grey chalk, hard grey Totternhoe Stone with a layer 

 of green-coated nodules at its base, overlying hard creamy-white 

 Chalk-marl, which passes down into the greyer and more gritty 

 Inoceramus-'bed ; beneath this the whiter and more compact sponge- 

 bed rests in the one case on the Gault, and in the other on the Ked 

 Chalk. 



The section shown in the pit about half a mile S.E. of the church 

 at Snettisham is almost identical with the last, as follows : — 



feet. 



Soil and rubble 1 



Grey f Rather hard chalk, dull white weathering in platy 



Chalk. 1 layers 8 



Totternhoe f Hard, greyish, massively bedded chalk, with an ill- 

 Stone. \ defined layer of green-coated nodules at its base 2£ 

 p, f Hard, creamy -white chalk passing down into greyer 



marl " I a more g r ^ty material, the whole divided by 



[ jointing into massive beds 15 



"We again recognize as the Totternhoe Stone the massively bedded 

 layer which is a prominent feature in the face of the pit. 



At the large quarries at Heacham the Totternhoe Stone is again 

 exposed as a bed of hard, grey, flaggy chalk with green-coated nodules 

 at its base. If anything, the underlying Chalk-marl is of a purer 

 white, showing up the darker grey stone in relief. Hardly so much 

 of the marl below it is shown as in the preceding exposures ; but its 

 thickness cannot be great, for the outcrop of the Red Chalk is seen at 

 the entrance of the pit. The pit is worked in two sections, an upper 

 and lower ; the whole, which shows a continuous section of the Lower 

 Chalk, is given on page 570. The section of the lower part is : — 



feet. 



Soil 1 



Grey chalk about 30 



Totternhoe f Rather dark- grey, hard, gritty, chalk with green- 

 Stone. |_ coated nodules at its base 2 



Chalk-marl. Hard creamy- white Chalk-marl... seen for 12 



The final exposure of the whole of the Chalk-marl, with the 

 Totternhoe Stone and basal part of the Grey Chalk, can be seen in the 

 cliffs at Hunstanton. The section (fig. 5) was taken a little to the 

 north of the lighthouse. 



The Totternhoe Stone is seen coming in with the gradual inclination 

 of the beds a little to the south of the lighthouse. It forms a 

 marked feature in the cliff face, its dark grey colour contrasting with 

 the material above and below it. Except at one point it cannot be 

 reached. Here the green-coated nodules can be seen at its base • 

 they can also be detected in fallen blocks, which may be known by 



