CiiAi'. XX XVI. J 
NAtil'l'H : MANDIU. 
9:55 
whitish, und browiiisli, in colour, of medium to coarse grain, and often 
contain miiscovitc scales. They also are often slickensided ; the accom- 
Fig. 70. — Slicken.sides-grooving in quartzites at Mandii. Fi-Kin a photo. 
panying figure, which is from a photograph of an outcrop of these 
quartzites on top of hill No. 1, does not show the grooves as well as it 
might. The direction of these slickensides-groovings is S. 28° W. at 
41°, but inmost other places, as in the ore-band, it varies from S.15° 
to 45° E. at 25° to 40°, and hence is, on the average, directed along the 
strike of the ore- bands. 
The ore-bands, which are two in number, may be designated as the north 
band (A) and the south band (B), respectively. They are roughly parallel 
and about 100 yards distant from each other, the character of the 
intervening rock being hidden by surface debris. The ore-bands ar^j 
bent and contorted in a most unusual manner, as indicated in figure 2 of 
Plate 40 ; but they have a general strike of E. 34° S. for band A and E. 25° 
S. for band B. Both bands had been, at the time of my visit, exposed 
along their strike by workings of any depth up to 10 to 15 feet, 
following all the curves and bends of the ore-bands. These workings, 
besides the variable strike, also showed that in both bands the dip, which 
is almost always fairly steep, is constantly changing, being sometimes 
towards the north-east and sometimes towards the south-west side of the 
band, indicating frequent overturns of the ore-bands. The ' country ' 
consists of the above-mentioned quartzite on the north side and of mica- 
schists on the south side of each band ; and, throughout, both ore and 
' country ' are much slickensided, as noted above. 
The northern band (A) is 285 paces long as measured in a straight line 
The northern band and 323 as measured along all the bends. It varies 
in width from 6 to 14 feet and lies on the south side of 
