558 
COMPARATIVE TABLES OF THE LOWER AND 
ZONES. 
SOUTH-WEST ABEA 
(DORSET). 
SOUTH-EAST AREA 
(KENT AND SUSSEX). 
/ 
Terebratulina < 
Nodular chalk with a 
layer of green- 
coated nodules at 
base ; Ho la s ter 
planus. 
Nodular and smooth 
chalk with Holaster 
planus. 
zone. 
Smooth white ohalk 
w i t h occasional 
flints ; Ter. lata.. 
and Inoc. Cuvieri. 
Soft white chalk with 
a few flints (in Kent) 
and seams of greyish 
marl ; Ter. lata, 
Inoc. Cuvieri and 
Gal. subrotundus. 
/ 
Plough nodular chalk 
with harder beds at 
the base ; Inoc. 
mytiloides and 
Massive chalk with 
layers of nodules 
passing down into 
hard nodular chalk 
Rhynchonella ( 
Cuvieri. 
R hy nch Cuvieri. 
(20 to 30 feet) repre- 
Hard smooth white 
chalk from 6 to 22 
feet thick ; few 
fossils. 
senting the Mel- 
bourn Rock ; Inoc. 
mytiloides, Car- 
diaster pygmeeus 
and Am. nodosoides. 
Thickness- - 
From 100 to 134 feet. 
From 214 to 230 feet. 
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Holaster 
subglobosus. 
Ammonites 
varians. 
Thickness- 
Soft grey marl (thick). 
White chalk with 
layers of grey marl, 
Am. navicularis. 
Greyish or whitish 
chalk, often with 
flinty concretions, 
Am. varians, Am. 
rotomagensis. 
Hard glauconitic chalk 
with phosphatic 
nodules and fossils, 
Am. varians, Scaph. 
cequalis. 
(Absent.) 
(Absent.) 
From 80 to 143 feet. 
Soft grey marl (thick) 
with. Act. planus. 
White chalk with 
Discoidea cylin- 
drica and Hoi. 
trecensis. 
Greyish chalk with 
Holaster subglo- 
hosus. 
Grey marly chalk with 
Am. varians, Am. 
rotomagensis and 
Rhyne, mantelliana. 
Grey chalk with Plo- 
coscyphia labrosa 
and Scaph. cequalis. 
Glauconitic marly 
sand with Stau- 
ronema Carteri. 
(Absent.) 
About 200 feet. 
