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H. W. FEILDEN AND C. E. DE RANCE ON 



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The great series of Tertiary deposits that occupy so extensive 

 an area have been shown by the labours of Mr. Lesquereux and 

 others to exhibit a succession of floras, the lowest characterizing 

 tropical conditions, fan-palms and bones of Crocodilus abounding, 

 which gradually disappear in the higher beds, of probably Miocene 

 age, until in the Middle and Upper Miocene palms have entirely 

 disappeared. 



To these latter horizons may be referred the Miocene rocks within 

 the Polar area occurring at Disco Island, where they reach a con- 

 siderable thickness, and are associated with the sheets of basalt 

 which have been so frequently described since they were first noticed 



