GREAT OOLITE SERIES : ROADE. 
399 
Some of the layers in the Great Oolite Clay strongly resemble 
beds of Forest Marble, and Mr. Thompson has used the name in 
describing the upper portions of this subdivision.* The pebbles of 
white limestone are probably due to some local erosion of the 
upper beds of the Great Oolite. Lists of fossils from the several 
formations have been published by Mr. Thompson. 
FIG. 112. 
Diagram-section to show the relations between the Great and Inferior 
Oolite Series from Northamptonshire to Lincolnshire. 
7. Great Oolite Clay. 
6. Great Oolite Limestone. 
5. Upper Estuarine Series. 
4. Lincolnshire Limestone. 
3. Collyweston Slate. 
2. Lower Estuarine Series. 
1. Northampton Sand. 
Roade and Blisworth to Northampton. 
Cuttings on the new Towcester (Midland) Railway, south- 
west of Roade, showed the following section : 
Glacial Drift. 
Great Oolite 
Limestone. 
Upper Estuarine 
(Beds not seen) 
Upper Lias. 
FT. IN. 
/ Boulder Clay (shown in cutting east 
\ of bridge over railway) - 10 to 12 
Tale fissile and earthy limestone, Ostrea 
abundant in earthy layer at base : 
0. Sowerbyi and 0. lingulata ? 3 or 4 
Thicker beds of pale earthy limestone ~| 
2 or 3 I 15 Q 
Shelly and oolitic limestones, false- j 
bedded - - - -J 
Bubbly marl with indurated bands, 
Ostrea, &c. sparingly ; and at base, 
marl with Rhynchonella, Ostrea, 
Modiola, Lima, &c. - - 7 
Botten marly limestones, with Rhyn- 
chonella, &c. - - - 2 
Rubbly marl, with Pholadomya (in 
position), Ostrea Sowerbyi, Rhyn- 
chonella ; very shelly in places 5 to 6 
Greenish grey and brown clay, with 
many specimens of Ostrea -40 + 
* * * 
{Stiff blue clay, shown in foundations 
for bridge over stream, by junction 
with L. & N.W. Bailway. 
* See Journ. Northamptonshire Nat. Hist. Soc., vol. vi. 1891, p. 294. 
