448 LOWER OOLITIC ROCKS OF ENGLAND: 
Forest Marble. The higher beds consisted of rubbly shelly lime- 
stones and clays. The basement-bed was a hard marly and shelly 
oolitic limestone, which might from its lithological character be 
assigned to the Forest Marble ; but it merged into the Oornbrash, 
and contained Terebratula intermedia, Avicula echinata, and 
Trigonia. 
Further south the junction of Corn brash and Forest Marble 
was exposed in a quarry on the north side of the road, and about 
half-way between Kidlington Station and the village to the south- 
east. The section (to which my attention was directed by Mr. 
E. A. Walford) is as follows : 
FT. IN. 
fRubbly limestone, with Avicula echinata 
(abundant) - .40 
I Grey racy clay - - - 8 
Cornbrash -{ Kubbly limestone : with very fine 
examples of WaldJieimia obovcita, in 
I upper portion, and Terebratula 
[_ intermedia in lower part 3 
f Blue-hearted gritty limestone - -06 
ijv>c,4- TV/TO T.W J Laminated calcareous sands and clays - 1 
)le> 1 Fissile shelly and oolitic limestone : 
I false-bedded. Seen to depth of 3 
The following species were obtained by me from the Cornbrash 
at Woodstock : 
Ammonites macrocephalus. 
Nautilus. 
Astarte elegans. 
Avicula echinata. 
Gresslya. 
Homomya Yezelayi. 
Isocardia (cast). 
Myacites recurvus. 
securiformis. 
Ostrea (large flat form). 
Pecten lens. 
vagans. 
Pholadomya Phillips!. 
Trigonia (costate form). 
Rhynchonella concinna. 
varians. 
Terebratula intermedia. 
inaxillata. 
Waldheimia lagenalie. 
ornithocephala. 
obovata. 
Serpula tricarinata. 
intestinalis p 
Echinobrissus orbicularis. 
A large collection of Cornbrash fossils, including about 76 
species, was made in this neighbourhood by Mr. J. F. Whit- 
eaves.* 
Islip to Bicesler, Buckingham, and Newport Pagnell. * 
The tract of country from Islip to Marsh Gibbon shows a 
succession of inliers of Cornbrash, &c., which rise in low dome- 
like masses. The Cornbrash is shown to a depth of 3 or 4 feet 
in the quarries, and presents its usual characters of rubbly lime- 
stone. Its full thickness appears not to exceed 6 feet. 
At Blackthorn Hill near Bicester we find the following 
section (see Fig. 109, p. 377) : 
* Kep. Brit. Asgoc. for 1860, p. 107. See a'so Hull, Geol. Woodstock, p. 25 ; 
and Phillips, Geol. Oxford, p. 233. 
