*s 



GDRT ROCK 



I. CO 3.50 3.0O 2.50 2.00 1.50 



PflRTiCLE SIZE DISTRIBUTION 

 niLLIMETERS 



LOO .90 .80 .TO .GO .50 .« .35 .X 



M I I 1 I I I I I 



10 .09 .08 .01 .OB 



CO -0.50 -0.00 -0.50 *:.00 -1.50 -2.00 «2.50 -3. CO *3.50 



VERT (XflRSE SfH3 



UENUCRTH SCHJE 



JW fl FPR D JUL* OCTC 



rEB B HTD RUG* NOV< 



ff«C JLH+ stpv DEC2 



E-9 



