LOWER TERTIARY. 1 69 



100 feet. Beds of pipeclay frequently occur; 



and occasionally, as at Newbury, the pipeclay 



contains fossil leaves like those at Bournemouth. 



in the Isle of Wight the bands of pipeclay are 



eptionally pure, as though they had been de- 

 rived from white felspar, but never extend far. 

 They are usually only a few inches thick, though 



IS nally thick beds are found. From them a 

 Bora has been obtained, which, although known 

 only from the 5 t plants, indicates many ui 



the types at the top of the London clay which are 



HfADON HILL 



uSSSg 



N. 

 Fig. 37. — Cliff ! lit, Bhowii 



im Bay and the 

 more b< :• m I nil. 



wn only from fruits; 50 that they may well be 

 regarded as a surviving part of th< ition of 



the London clay. Among these Alum Day plants 

 54 >me of the I md Sequoia, Smilax and 



the palm Sabal is identified in both. There is the 

 le arum named Aronium. The oak, walnut, 

 laurel, cinchona, ebony, magnolia, maple, the 

 soapworts Sapindlus and Cupania, the allspice 

 and Eucalyptus, the almond and plum, and the 



