COENBRASH : WOODSTOCK. 
447 
The beds were faulted in several places, but the sequence shown 
was as follows (See Fig. 108, p. 374) : 
FT. 
Kellaways 
Beds. 
Cornbrash 
IN. 
"Fine yellow and grey sands - 5 
Dark bluish-grey clay, and stiff mottled 
grey and brown clay, with " race " in 
the lower part ; and much ferru- 
ginous matter at the base - 10 
Thin layer of sand overlying seam of 
clay - - - - -05 
"Eubbly and fissile marly limestone, 
with lignite, Waldheimia lagenalis, 
large Ostrea - - 1 
Impure limestones with lignite, pyrites 
and ferruginous matter: Rhynchonella 
varians 1 2 
Hard" mottled limestones : Modiola, 
Pecten lens, Trigonia, Waldheimia 
lagenalis, W. ornitTiocephoJla, 1 6 
Soft earthy and shelly marl and 
mottled blue and grey limestone : 
Astarte e'egans, Avicula echinata, 
Isocardia, Homomya Vezelayi, Mya- 
cites, Ostrea, Pecten vagans, Photo* 
domya Phillipsi, Trigonia, Wold' 
heimia cibovata, &c. - - 4 
Hard bluish -grey limestones with 
marly patches : Avicula echinata, 
Gresslya, Myacites, Pecten vagans, 
Trigonia, Echinobrissus clunicularis 2 
Fissile marly beds and tough brown 
and grey shelly limestone, with 
Avicula echinata, and Terebratula 
intermedia (very abundant) - 2 
Forest Marble- / Blue and greenish-grey clays, &c. 
' t (See p. 373.) 
The details of the Cornbrash were seen to vary from point to 
point, and the thickness may be stated at from 12 to 14 feet. 
The basement-bed crowded with fine specimens of Terebratula 
intermedia was the most noticeable feature ; and it was interesting 
to compare these forms, with the allied and even more abundant 
specimens of T. maxiilata found in the Great Oolite below. 
The limestones of the Cornbraph, as seen in this railway-cutting, 
were variable in character and induration ; where under the Kella- 
ways Olay the rock was usually a hard dark blue or bluish grey 
stone, much of it having a mottled appearance, not unlike a bed 
seen at Akely near Buckingham, and not unlike the Great Oolite 
of Bedford. Other beds are fairly uniform in character. The 
mottled beds are caused by irregular admixture of marly matter. 
At Sturdys Castle, between Woodstock and Tackley, quarries 
have been opened, and Prof. Hull obtained from them a number 
of fossils.* 
In the quarry south of Bletchington railway-station, the Corn- 
brash to a thickness of 7 feet was well shown, overlying the 
* Geol. Woodstock, p. 25. 
