322 
LOWER OOLITIC ROCKS OF ENGLAND: 
supposed equivalent of the Stonesfield beds." This general 
succession agrees with that I have previously noted (p. 320). 
South of Bletchington station, and on the western side of the 
railway, there is a succession of quarries, where the lower beds 
of the Forest Marble and the Great Oolite are well shown. It 
will be useful to record the general section to show the variable 
nature of the beds, and the difficulty in fixing any uniform plane 
of division between the Forest Marble and the Great Oolite : it 
is as follows : 
Forest Marble 
Great Oolite 
{Upper Division). 
fRubble. 1 
Blue-hearted shelly and oolitic lime- 1 
stone, with lignite and clay-seams > 
False-bedded oolitic and shelly lime- I 
stone, with clay-galls -J 
Hard white finely oolitic, shelly and 
compact limestone (blue-hearted) : 
Building- stone - 1 6 to 
Dark green and greenish-grey clay 
with "race," and lignite; and bands 
of ferruginous and shelly oolite : 
Ostrea Sowerbyi - - 4 6 to 
Pale and iron-stained shelly and oolitic 
marly limestone, harder and more 
compact at top 
Hard white marly limestone : Fossil 
Bed* : with Natica intermedia, 
Fibula variata, Cypricardia, Unicar- 
dium, Terebratula maaeillata, Tham 
nastrcea, &c. 
Grey marl 
Pale oolitic limestone - 
Limestone, partially oolitic- 
Pale shelly oolite 
Oolite - 
FT. IN. 
8 
4 2 
Phillips at one time took the greenish clay with Ostrca, as the 
base of the Forest Marble.f A similar bed however occurs in 
the section on the Woodstock branch railway, well below beds of 
Great Oolite; and again south-west of Enslow Bridge, below 
one of the fossil-beds yielding Terebratula maxillata, &c. It 
will be noticed that we have a greater thickness of beds assigned 
to the Great Oolite at Enslow Bridge, and there near the base of 
the Forest Marble we find lumps of marly oolitic limestone, as 
at Hensgrove, Wychwood Forest, suggesting some local erosion 
of the strata. 
Tracing the beds to the quarry on the eastern side of the 
railway (see p. 373), the Forest Marble there rests on hard grey 
and iron-stained oolite, exposed to a depth of 4 feet, which may 
be the bed below the green clay in the section west of the railway, 
If this be the case we have further evidence of the discordance 
* This bed may be compared with Beds 15 or 23 in the section near Hook Norton, 
p. 330 ; and the fossils may be compared with those recorded from the cutting at 
Ashford Bridge (p. 318). 
f Quart. Journ. Geol. Soc., vol. xvi. p. 118; see also Geol. Oxford, &c., pp. 152, 
i54. 
