evolution (Table 10, Fig. 25). But a slight alteration is seen in sur- 

 face samples (Kerdeniel, March 28, 1979), which may be explained by 

 the reemergence of masses of only slightly degraded crude, which have 

 been trapped in sand, during a storm. 



TABLE 10. Distribution of the cycloparaf f ins by the mass spectrometry. 



"T» MCI" 



r T r, iirL .'f ,i" . '-■ 



'.r"D r NIFL ? n .'n.?'< 



T'lFO^'A'l 31.01. '9 



PTin\"ir.n\ i.n.;n 



GIJISSFNY 1.04,/n 

 I"31TSA.IL 1."'1.'1 



P'-ttt J. (14. 711 

 CUI5PFMV ?l.'n.71 



-*■ 



Nomhro dn nnynu« (n«pht>lnml 



FIGURE 25. Distribution of the cycloparaf fins by the mass spectrometry. 



139 



