694 



AERHENIUS 



[chap. 25 



sediments. The present author found a narrow size frequency distribution of 

 quartz centred at 3-10 [x in north equatorial Pacific clay sediments, and 

 suggested eolian transport as an explanation. Rex and Goldberg (1958), in 

 subsequent extensive studies of Pacific sediments, demonstrated a regional 

 regularity in the quartz distribution (Fig, 22), which they interpreted as an 



Fig. 22. Areal distribution of quartz in the Pacific. (After Rex and Goldberg, 1958.) 



indication of fallout of dust from the high altitude jet streams. The importance 

 of tropospheric transport is indicated by the numerous observations of extensive 

 dust-falls at sea in the equatorial Atlantic (Radczewski, ojp. cit.; Seefried, 1913) 

 and Indian Oceans, and in the South Pacific (Marshall and Kidson, 1929), and 

 further by the correlation between the wind pattern from arid areas and the 

 occurrence of dry atmospheric haze at sea (Fig. 23). Rex and Goldberg {op. cit.) 



