TABLE 4-1

EM ANOMALY STATISTICS UNGA BLOCK
CONDUCTOR

GRADE	CONDUCTANCE RANGE

SIEMENS (MHOS)	NUMBER OF

RESPONSES
7	>100	1
6	50-100	2
5	20-50	19
4	10-20	80
3	5-10	90
2	1-5	369
1	<1	130
*	INDETERMINATE	231
TOTAL	1022
CONDUCTOR TYPE

(FIGURE 2)	MOST LIKELY SOURCE

MODEL	NUMBER OF

RESPONSES
D	NARROW BED ROCK CONDUCTOR	6
B	BEDROCK CONDUCTOR	729
S	CONDUCTIVE COVER	276
H	ROCK UNIT OR THICK COVER	10
E	EDGE OF CONDUCTOR	-
TOTAL	1022