408 



The late Sir Joseph Prestivich- 



At the back of the new road by the Canal [New Eiver] : — 



Brown clay ... 3 feet. 



Gravel [ia pockets] 2 to 3 feet. 



Sand and clay 1 to 2 feet. 



Yellow sand 



Pit in centre of field : — 



ft. in. 

 4 



ft. in. 



8 to 10 



Brown clay 



Gravel 



Light greenish-grey clay ... 



Yellow clay 



Peaty bed ... 



Brown clay ... ... 



Yellow sand 



Large pit behind Highbury Barn : — 



Brown clay — London Clay remanie 



Gravel [in pockets] 



Yellow sandy and brown clay and seams of gravel ) 



Grey and brown clay and ferruginous gravel in thin seams 



Peaty seam 



Ferruginous sand and small gravel 



Brown clay banded with grey clay 



Peaty clay and angular black flints 



Brown clay 



Light brown sand 



Laminated clay ... 



Pine light yellow sand 



Could find no shells or fossils. 



A few hundred yards to the north (just across the road) the 

 Brickearth is said to end. On brow of hill London Clay, with a few 

 pebbles at top. . 



Tylor states that at Church Street, Stoke Newington, the lower 

 sands were 20 feet thick in places. 



Sept. 15, 1848. — Mr. Wetherell showed me a specimen of rolled 

 Astrcsa, 2 inches over (Carboniferous Limestone), from the gravel 

 at Whetstone gravel-pits. Also a trilobite from Muswell Hill. 



Great Northern Railway, Wood Green cutting (south of Bounds 

 Green ciattina:) showed : — 



Feet. 



3 

 15 



Tertiary flint-pebbles in sand 



Stratified white and yellow sands, no fossils 



Subangular flint-gravel and Tertiary flint-pebbles, with beds 



of sand ... ... ... ... ... ... ... 4 



London Clay — Fine brown clay ... ... ... ... 2 



Dark or black clay with very small (1 to 

 2 inches) Septaria 



May 29, 1855. — The swallow-holes at North Mims are in a field. 

 The water rises in this field sometimes 12 to 15 feet, and sinks there 

 slowly through the several holes, which are not deep, and sided with 

 silt. The water comes up again beyond the church. 



[See also "Whitaker, " Geology of London," vol. i, p. 203.] 



March 3, 1850. — Hitchin. The sand and gravel of the hills 

 around the town appear to be the drift above the Boulder-clay. 



