GREAT OOLITK SERIES: LITTLE BYTIIAM. 
Blue clay, slightly mottled 
Brown and blue mottled, stiff clay, 
with lumps of soft carbonate of lime 
Tea-green clay, ferruginous at the 
bottom ... 
Dull tea-green clays - 
j Lighter-coloured tea-green clays, with 
Upper Estuarine J Reams of comminuted shells and 
Series. j carbonaceous markings 
Brown sand, fall of shells, and con- 
taining carbonaceous markings 
Black clay 
Lighter-coloured and more compact 
clay ..... 
Greenish, compact clay, with ferrugi- 
nous markings 
Tea-green clays with ferruginous 
markings .... 
Dark-blue, compact clay with ferrugi- 
nous markings 
Dark-blue, compact clay, becoming fer- 
ruginous at the bottom, with vertical 
plant-markings 
Brown, ferruginous clay (representative 
[_ of junction-bed) 
f~ Bubbly limestone (Inferior Oolite) 
| The following were seen in tint Rail- 
way-cutting : 
< False-bedded oolitic limestone - 
| Sandy bed, full of oolitic grains 
I Compact, blue-hearted, oolitic lime- 
[_ stone, slightly false-bedded - 
FT. 

IN. 
4 
4 
7 
Lincolnshire 
Limestone. 
In the railway-cuttings near Oounthorpe, Sway field, and Corby, 
the Upper Estuarine Beds were at one time well exposed. These 
sections were described by Prof. Morris, who noted the following 
general sequence : 
[Great Oolite 
Limestone.] 
[Upper 
Estuarino 
Series.] 
Lincolnshire 
Limestone. 
{Soft brown marly rock, with layers of 
Ostrea, and with Lima, Modiola, 
Perna quadrata, Serpula, &c. 
"Mottled clay with bands of oysters 
Dark bituminous clay - 
Compact sandy and soft shelly rock, 
with vertical remains of plants ; 
Natica, Modiola, Trigonia 
Dark green and brown shelly clays 
Dark shelly clays, with Avicula, Cyrena P 
Lima, Ostrea,, Pecten, &c. 
Mottled and dark clays, and bituminous 
band (at base) .... 
Brown and grey clays, with numerous 
vertical plant-markings 
White and yellow clays with ferrugi- 
nous band at base ... 
> Fine grained and pinkish oolite. 
FT. IN. 
Here two layers with vertical plant-remains occur ; the upper one 
was included in the Great Oolite Limestone in the Geological Survey 
Memoir.* 
* Geol. S.W. Lincolnshire, p. 65. 
D D 2 
