Notes on the Drift Deposits. 



415 



3. Midland and Northekn Counties and Wales. 



1851.— Cutting at Winslow on L. & N.W. Railway to Oxford 

 shows : — 



Coarse gravel [about 2 feet] ] 



Blue Boulder-clay [about 8 feet] / 12 feet. 



Light- coloured gravel [about 2 feet] ... ... ... ) 



Aug. 10, 1856.— Cock Hotel, Stony Stratford. Oolite quarry 



near Cosgrove : — 



Feet. 



a. Earth and worn fragments of oolite, with a few angular 



flints and New Red Sandstone pebbles 2 



b. Oolitic flags, broken at top 2 



e. Oolitic marl " 6 



d. Oolite in thick beds — bluish 



Pupa and a small Helix are found in a, but may have been 

 washed in. This bed covers the oolite down to the canal, same 

 thickness all the way. The top of this pit appears to be only about 

 20 to 30 feet above the river. 



Descending the hill, and on another low hill on same level as the 

 oolite, is a gravel and sand pit. The sands are composed of oolitic 

 and quartz grains, with a few oolitic and quartz pebbles, flint 

 fragments, full of false stratification. No shells. 

 The coarse gravel is composed of: — 

 Large coarse pebbles and worn fragments of hard oolitic beds — some blocks 



1 foot in diameter. 

 Hard chalk. 



Subangular flints, brown from gravel and white from Chalk. 

 Clay and shale nodules, Lias and Oolite. 

 Small ironstone fragments. 

 Quartz pebbles, a few large. 

 A few grey and reddish siliceous sandstone pebbles, but not numerous— no 



supply, or a very small one, from New Red Sandstone. 

 A few pebbles of slate and old rocks. 

 Fossils of the oolites are numerous. They are not much worn. 

 In the upper soil are a few^ New Red Sandstone pebbles. 

 1856.— Pit just above valley at the foot of Cosgrove Hill. 



W t 



4. Surface drift and earth, local, and New Red Sandstone \ 



pebbles. / About 



1 and 3. Sand with false lamination, coaly bands. I 17 feet. 



2. Very coarse gravel — some blocks 1 ft. in diam. : 4 to S ft. / 



