■"^tUV^ 







Fig. 8. (a) Small fragment of fish skeleton showing alpha tracks in the emulsion 

 (Reprinted with permission from Researches in Geochemistry, P. H. Abelson, 

 Editor, p. 17, John Wiley & Sons, New York, 1959.) (b) Partially dissolved 

 radiolarian skeleton in thin section of Tertiary sediment at 8 m below top of core, 

 Capricorn 49 BP (X 200). 



361 



