TYLOR QUATEENAEY GRAVELS. 



95 



The Cyrena-bed varies from 4 feet to 6 feet (D, fig. 29) in thick- 

 ness, and consists of false-bedded sand containing a great number of 

 small and delicate shells in a perfect state of preservation. 



Fig. 30 exhibits the series of gravels in the Stoke-Newington pit, 



w 



Pig. 30. — Section in StoTce-Newington Pit, 



vrhich is 43 feet deep. The bottom consists of yellow false-bedded 

 sands, passing upwards into a series of stratified brick-earths and 

 clays with veins of gravel. The covering bed, Jc, is indented into 

 the brick-earth,^; it is from 6 to 8 feet thick, composed of large flints in 

 stiff brown clay, and forms a marked contrast to the finely laminated 

 loams and clays forming the 30 feet below it, c-Tc. The bed / is a 

 black peaty clay; and the shells in the list from Stoke Newington are 

 found in brick-earth and clay above this black bed in the adjoining pit. 

 The covering bed reaches a height of 125 feet above the Ordnance 

 datum-line, and is within 300 yards of the escarpment of the London 

 Clay to the north. Where the London Clay is visible to the north, 



