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THE GEOLOGY OF BRITISH EAST AFRICA part hi 



middle life " (Mesozoic), is seen for the last time, and the rest 

 of the journey is over " London Clay," deposited during the 

 Eocene. The next two periods, the Miocene and Pliocene, are 

 not represented in this district, and we pass at once from the 

 London Clay to the gravels of the " Pleistocene." In some of 

 these, formed by the Thames when it flowed to the north of its 

 present position, we find the flint implements made by early 

 man. 



Thus, in a journey from Holyhead to London, we may see a 

 sequence of deposits which includes representatives of most of the 

 great periods in the earth's history. The following table sum- 

 marises this sequence, marking the rocks which belong to the 

 different divisions in England, and those which, as we shall see, 

 represent them in British East Africa, 



Tlie Geological History of British East Africa. — In British 

 East Africa there is no long succession of fossiliferous deposits, 

 as in England. In 1892 the only fossils recorded from it were 



