126 PROF. J. PRESTWICH ON THE RELATION OF THE 



The Shingle (No. 1) is approximately composed of: — 



per cent. 



1. Flint-pebbles 30 



2. White quartz-pebbles 30 



3. Subangular flints 20 



4. Subangular i'ragments of chert and ragstoue 12 



5. Pebbles of light-coloured quartzite, sandstone, greyish arkose, 



and dark metamorphosed slate 8 



100 



Its thickness is uncertain, as the Boulder-clay does not show until 

 the higher part of the hill is reached. 



West of Woodbridge the Westleton Beds have undergone -consider- 

 able denudation, and are generally removed and replaced by Glacial 

 gravels and Boulder-clay. They, however, sweep round to the north 

 of this area, and were to be seen in some small exposures in pits 

 north-east of Ipswich. 



At Pinnford Bridge the section gave : — 



feet. 



7 r Bluish Boulder-clay with chalk pebbles, &c 6 



' I Seam of laminated brown clay ^ 



c. White sands and gravel, the lower part false-bedded. 12 



In the lane leading from Wituesham Street to Tuddenham I 

 took the following section : — 



feet. 



b.. Light brown Boulder-clay 5 



c. White sands and gravel (Westleton) ... 2 to 4 

 e. Red Crag 8 



In the fine section described by Mr. "Whitaker* near Bramford, 3 

 miles north-west of Ipswich, he expresses an opinion that Bed No. 2 

 may be of Crag age. I would take it to represent the Westleton 

 Beds. The following is Mr. Whitaker's description of this pit. 

 Beds 3 to 6 are given only in abstract f. 



feet. 



1 . Glacial drift. Grravel and sand, resting irregularly on 2. . . up to 8 



2. Fine light-coloured sand with thin clayey layers ; at 



the bottom a thin layer of gravel with phosphatic 



nodules (may belong to the Crag) up to 15 



8 & 4. London Clay with a Pebble-bed at base 10 



J3. Reading Beds with a few flints and pebbles 18 or more 



(1 Thanet Sands 5 



7. Chalk. 



Three miles south-west from the last pit is the village of Biirstall, 

 and on the slope of the hill on the banks of the small stream I found 

 (1856) the following section : — 



feet. 



6. Boulder-clay, chalky 3 to 10 



r White gravel or shingle (Westleton)... 8 to 10 

 ^- 1 White sands 2 



* Mem. Geol. Survey, ' Geology of Ipswich,' &c., 1885, p. 14. 

 t This pit had not been opened out to its full extent when I last visited it 

 several years ago. 



