TRANSACTIONS OF SECTION C. 799 
Cuttings near Sulgrave and onwards to Helmdon and Brackley showed 
peeitorons marls and limestones of the Great Oolite with underlying Estuarine 
8. 
At one point east of Hill Farm, south of Radstone, where the Boulder Clay 
rested on the marls and limestones of the Great Oolite, streaks of reddish brown 
clay were noticed at the base of the grey Glacial Clay. Elsewhere the Boulder 
Clay was seen resting on a piped surface of Great Oolite, the ‘ pipes’ being filled 
with reddish-brown clay. In places the Great Oolite was somewhat disturbed 
and nipped up. Evidently the agent which produced the Boulder Clay was 
forced over an old land-surface formed of Great Oolite. That formation was 
disturbed in places, and portions of the old soil were stripped off and incorporated 
in the Boulder Clay. Further south the Boulder Clay was banked up against a 
bed of coarse boulder-gravel, such as is found near Buckingham, near the southern 
margin of this Glacial drift. 
In places pebbles from overlying gravel were noticed to occur a foot or two 
down, in Great Oolite Clay. In dry weather, when clays become deeply fissured, 
stones from overlying drift or soil may drop into crevices, and become embedded 
ina much older deposit to a depth of four or five feet. 
No cornbrash was shown in any of the cuttings. South-west of Rosehill 
Farm, near Chetwode, the Oxford Clay appeared, and it was well seen north-east 
of Charndon Lodge Farm, where clays of the zone of Ammonites ornatus were 
exposed. 
Near Steeple Claydon a specimen of 4. Sutherlandie with A. Lamberti 
attached was picked up on the embankment. The fossils were identified by 
Mr, G. Sharman. 
7. Report on the Stonesfield Slate—See Reports, p. 356. 
8. Report on the Investigation of a Coral Reef.—See Reports, p. 377. 
9. Report on Geological Photographs.—See Reports, p. 357. 
MONDAY, SEPTEMBER 21. 
The following Reports and Papers were read :— 
1. Report on the Hoxne Excavation.—See Reports, p. 400. 
2. On the Discovery of Marine Shells in the Drift Series at High Levels in 
Ayrshire, N.B. By Joun Situ. 
By rye best developed the Ayrshire Drift Beds are arranged in the following 
order :— 
- Upper Boulder-clay, often with large blocks. 
. Stratified sand and gravel. 
- Boulder-clay, blocks generally small. 
- Gravel, sharp sand, hour-glass sand, and muddy sand. 
» Laminated mud or clay, sometimes with one or two beds of Boulder-clay. 
» Lower Boulder-clay, often with large blocks. 
- Mammoth and Reindeer bed at Kilmaurs. 
In bed No. 1 marine shells occur at 40 and 1,061 ft. above sea-level, and at 
many intermediate heights, 
In bed No. 2 I have got marine shells frequently up to a little above 200 ft. 
above sea-level, and in one instance at about 800 feet. 
In bed No, 8 marine fossils are frequent up to at least 600 ft, above sea-level. 
“ID Orie COD 
