INFERIOR OOLITE : LINCOLF. 
217 
Astarte elegans. The higher portion resembles the Kirton Beds. 
Bed 2, which is well shown in the railway-cutting north of 
Nocton, may be on the horizon of the marly bed that overlies 
the Kirton Beds. At Nocton it rests on beds of grey limestone, 
of a c< Liassic" aspect, and thus it would seem to be stratigraphi- 
cally connected. Bed 3 may be compared with the Hibaldstow 
Beds. 
Lincoln to Kirton Lindsey and Winter ing ham. 
The lower beds of the Inferior Oolite Series (the Northampton 
Sand and the lower portion of the Lincolnshire Limestone) have 
been well exposed at the Greet well road quarry, east of Lincoln 
Gaol where the section was as follows* : 
Lincolnshire 
Limestone. 
FT. 
1 
3. 
Northampton 
i Sand (Dogger). 
Upper Lias 
10 
2 
Ix 

5 

f Marl and rubble ... 
| White marly limestones, with scat- 
7. 4 tered oolite grains : beds known 
I as Top and Bottom Nerlys (free- 
I stone) - - 
fFine oolitic and fissile limestone 
with scattered oolite grains : 
Upper Silver Bed 
Limestone with scattered oolite 
,, J grains : Sink Stone 
' j Compact limestone with scattered 
oolite grains ; Ammonites polya- 
canthus, Natica cincta, and 
1 Astarte elegans. Bottom Silver 
[_ Bed - - - 1 6 co 
5. Marl and limestone with scattered 
oolite grains : used for road-metal 
and concrete ... 
4. Variable beds of limestone with scat- 
tered oolite grains, and bands of 
coarse oolite : a bored-bed in upper 
part. The lower layers form the 
Walling Bed, and the more com- 
pact beds are regarded as good 
Weather Stone ... 
Oolitic limestone (of no use), with at 
base 6 inches of very tough oolitic 
rock with pebbles - 
"2. Ironstones worked to depth of 8 or 9 
feet, when water is reached : total 
from - - - 6 to 
ll. " Coprolite Bed " 
Blue Clay. 
At the above quarry the beds are worked for building-stone, lime and 
concrete, and road-metal. The Walling Bed, which is blue-hearted, 
contains a few casts of Gasteropoda. This bed is said to stand-better as a 
weather stone if got up " green " (or when damp), and afterwards seasoned. 
The Silver bed, it is said, should be quarried in summer time and well 
dried. 
The variable thickness of the Ironstone (Basement Beds), the 
occurrence of a pebbly layer at the base of the Lincolnshire 
* Numbers are affixed to the records of strata for the purpose of comparison with 
other sections described in the immediate neighbourhood. 
