Fig. 2. — Graphical representation of typical mechanical analyses 

 of the Eocene deposits. 



100% 



00. 



80.. 



60 



9 50 



.5 40. 



30 



20 _ 



10 



40 



10 



05 0-25 001 0-05 



• Grade-Sizes (diameter in millimetres) 



001 



Fig. 3. — Typical Eocene residue containing large grains of topaz , 

 Haldon Hills, x 80 diameters. 



