SMITHSONIAN MISCELLANEOUS COLLECTIONS 



Table i. — Incidence of grozvth-layer type 

 Analysis of figure 2 



4 i»7i 4 3 1911 o 8 



4 07 08 



4 4 3 25 



4 07 07 



4 17 09 

 II 08 08 

 2 08 4 5 



5 071 36 

 51 08 09 

 S 80 17 



1 84 1 o 5 



1 4 



4 001 27 



5 071 09 

 S 08 7 2 

 S 17 09 



5 08 27 

 61 08 36 



6 081 09 

 6 08 2 ■; 



31 so 



5 08 



5 o 8 



6 S 3 



6 2 7 



7 07 



561 5 2 1901....0 S I 1941....0 7 



16 3513 09 



2 5 081 36 

 16 72 09 

 16 261 27 

 07 I 081 62 

 07 072 



07 1 I 8 



07 09 



3 4 36 



Notes: 



1836 — an average growth layer on HPC 7, a uniform sequence. 

 1934 — an average growth layer on HPC 6, a uniform sequence. 



