ANISOTROPY IN APPARENT RESISTIVITY CURVES 45 
I 
Ry a/ 4070, + =a 
+2), K* ee 
i / va + [1+ Gon r) / =| 
Ol 
I 
a Wy achat SAN eh EN 
4/ sore Se E + (2n — 1) <li 
a2 
The formula for the apparent resistivity in this case is given by: 
— Vn We 
Pa = 270\/ay a Rae 
in the £, 7, ¢ system as a function of the distance a measured in the 
xyz system. 

non-homogeneous layers is given by: 
n=00 I 
ee ELD Ke — 
pw n=1 / +( h ) 
I 2n BUG 
My ay or Ne 
ys i ( ii wa) 
n=o 
+2)) K* 
l 
ana Ten 
It is well to stress the point that p’;, represents the resistivity of the 
homogeneous top layer corresponding with the anisotropic case 
under investigation and that in order to obtain comparable resistivity 



IV. 




705 
