AND LEICESTEESHIRE AND THEIR RELATIONS TO GEOLOGICAL STRUCTURE. 95 
Glacial 
Boulder clay, &c. 
Unconformity. 
. Thick sheet of stony clay 
of irregular distribu¬ 
tion, mainly developed 
on the higher ground, 
with glacial sands 
along the river 
valleys. 
Thickness. 
Feet. 
o 
O 
N 
O 
Inferior 
Oolite 
Lias <; 
" Inferior Oolite 
Limestone 
Estuarine beds . 
Northampton 
Sands 
Upper Lias.... 
Marlstone 
Middle 
Lias 
•< 
Clays 
[ Lower Lias. 
" Bhaetic. 
Keuper Marl . 
, Trias 
Waterstones . 
tBunter Beds . 
U nconformity. 
" Permian. 
Variable sands and clays 
Iron-ores and ferruginous 
sands 
Blue clays. 
Oolitic iron-ores and fer¬ 
ruginous calcareous 
sandstones 
Blue clays with thin 
limestone bands 
Calcareous shales with 
thin bands of nodular 
limestone 
Red and green marls 
with thin bands of 
gypsum, and of cal¬ 
careous sandstone 
Red sandstones 
Red sandstones and 
pebble-beds 
Red marls and dolomitic 
limestones 
26 
26 
24 
only developed in 
h extreme east of 
the district. 
120 
7-14 
100-120 
670 
30-40 
630 
0-1201 
0-400 I 
> 
0-60 . 
only developed 
in north-west¬ 
ern part of 
district. 
'o 
N 
o 
J 
cS 
PM 
Unconformity. 
Coal Measures 
tB 
3 
O 
o 
r.Q 
o 
Millstone Grit. 
Carboniferous Lime¬ 
stone 
Shales, fire-clays, clay- 0-5000 
ironstones, sandstones, 
and coal-seams 
Massive sandstones and 
shales 
No rocks belonging 
crop out at the surface, 
ground. 
Unconformity. 
Pre- r Charniau . . 
Cambrian | 
0-740 (not exposed at 
surface, but proved in 
a boring). 
(Not exposed at the 
surface nor proved in 
bore-holes.) 
to any Palmozoic Formation below the Carboniferous 
nor have any such rocks been as yet proved under- 
Limestones, dolomitic 
limestones and shales 
Slates, ashes, and agglo- Great thickness, 
merates 
