Lower cMa lk—Renl 
49 
Middle 
Chalk. < 
ft. 
2 
8 
in 
0 
0 
Melbourn 
Rock. 
6jft. 
( 
Lower 
Chalk. 
{ 
Soil and rubble - - 
Firm white chalk ------ 
Hard rough whitish chalk, scarcely nodular, contain¬ 
ing Rhynch , Cuvier i - .60 
Rough nodular chalk much broken - - 2 0 
Very hard nodular chalk ; the nodules 
in both the above courses are creamy 
i yellow - -----20 
Very hard nodular chalk, whiter than that 
above, much streaked with green-grey 
1 marl - - - - - - - 26 
'Marly chalk weathering into thin laminae, 
with lenticular beds of hard white chalk, 
Belemnite J very variable in thickness— Actino- 
Marl. | camax plenus , 1 ft. 3 in. to 2 6 
Firm greyish-white marly chalk, the base 
sometimes marked by a thin marl seam, 
4 ft. to 5 0 
V Whitish chalk,firm and blocky, gradually 
passing to grey hard chalk - about 80 0 
The quarries of the Bur ham Brick and Lime Company, situated 
nearly two miles east of the river Medway, and three-quarters of a 
mile E.S.E. of the village of Burham, afford an excellent series of 
exposures, for the whole succession from Upper Gault to the base 
of the Upper Chalk can be seen with the exception of a part of the 
zone of Ammonites varians. 
There are two quarries. In the lower one, where the Lower 
Chalk is seen, the section taken in 1896 was : — 
Middle Chalk and Melbourn Rock - - - - 30 
Greenish-grey laminated marl with lenticular 
beds of hard white chalk - - 1 ft. to 16 
Pale buffish-grey marly chalk, fracture often 
conchoidal— Actinocamax plenus. - - - 6 0 
f Firm white chalk, passing gradually down to 
grey chalk— Hoi. subglobosus, H. trecensis, 
Terebratula biplicata - about 80 0 
Grey marly chalk, Rhynchonella mantelliana, 
Kingena lima, Am. [Acanthi] rotomagensis , 
Ter. semiglobosa , and Serpula umbonata , 
about 15 0 
in. 
0 
Belemnite 
Marl 
Beds 
6,7 and 8. \ 
Bed 
5. 
The Belemnite marls are clearly exposed. In the upper marly 
band the lenticular beds of hard white chalk often predominate, 
the marl being subsidiary. The 6-foot bed beneath can be followed 
round the quarry, as it differs from the underlying chalk in having 
a laminated structure which is brought out by the weathering. 
The grey chalk at the base is lower than that in the quarries 
nearer the Medway, and the presence of Rhynchonella manlelliana 
in some abundance is noteworthy ; either this species ranges higher 
than at Folkestone, or else this marly chalk corresponds with that 
immediately overlying the “ cast-bedin the coast section. In the 
latter case, however, the zone of Hoi. subglobosus must be thinner, 
and that of Am. varians thicker, than at Folkestone. 
In the quarry close by Otford Station some 60 feet of the Lower 
Chalk is exposed. White or nearly so at the top, it passes down to 
4219 D 
