Ch^p. XL. ] 
VIZAGAPATAM : GARBHAM. 
1083 
The deposit, before work was commenced, appeared at the surface as 
a long low ridge reaching a height of 70 to 80 feet above the plains at the 
part known as ' Hilltop.' The total length of 
Length of the deposit. workings, as measured by Mr. H. B. Geeson, 
present manager of this deposit, is 1,600 feet in a S. of E. direction, while 
outcrops continue for another 200 yards to the west, giving a total length 
of 2,200 feet. Still farther west, aft«r a E.-W.-running mound of white 
vein-quartz or very coarse-grained quartzite, some 200 yards long, is a 
series of workings, some 250 yards long, stretching in a W.20°]Sr. direction. 
They are known as the Palapgaddi workings, although they are within 
Garbham village limits (see page 1095j ; if the Garbham deposit be 
assumed to be continuous below the surface right to their western end, 
then the total length of the deposit is about 4,500 feet. 
The width of the ore-body, judging from a section (Fig. 87 below) 
across the middle of the deposit, is 260 feet measured horizontally ; or, 
taking an average dip of 40° to the south side, the actual thickness of the 
ore-body is 167 feet, of which 100 feet consists of ore, the remainder 
being lithomarges, wads, etc. In a section 
Width of the deposit. ^^^^^^ ore-body to the west of the middle 
the total horizontal width is about 350 feet, the greater width being 
due to an anticlinal fold. The actual thickness of ore is 81 feet in this 
section. In a section (Fig. 88 below) across the deposit to the east of 
this the total thickness of ore is much smaller still. 
The strike of the deposit is S. E. at the eastern end, changing to 
W. 10° S. at the western end of the mine, and 
Strike of the deposit. ^ ^0° N. in the Palapguddi workings. 
Except for the last paragraph (page 1095), all that follows deals only 
with the Garbham deposit proper as exposed by the Vizianagram 
Mining Co. 
The actual ' country ' of the ore-deposit, as exposed in the workings, 
consists of various varieties of felspar and quartz- felspar-rock, sometimes 
showing gneissose banding and usually ex- 
• Country.' , , ,. • n m, r i , r , 
tremely kaolmized. Ihe felspar, where fresh 
enough to be tested, is found to be a potash variety. 
A close examination of the many sections seen in the Garbham work- 
ings shows that the rock from which the ore originated was partly span- 
dite-rock (in some places spandite-quartz-rock), and partly a quartz-ortho- 
