98 TIN DEPOSITS OF NEW SOUTH WALES, 
IrrecuLarR Deposits. 
Although true fissure lodes do not appear to have been found 
very widely distributed throughout the New England area, 
there have been numerous deposits of tinstone discovéred which 
The granite itself in the stanniferous belt already alluded to is 
largely impregnated with cassiterite, a small percentage occurring 
throughout the length and breadth of the exposure, but along 
certain lines, indeed generally near the junctions of the granite 
and slate shown in the section (page 97), the granite is some- 
times so richly impregnated as to form a tin-rock, which would 
be high economic value as stamps work. Probably the 
richest of these impregnated belts of rock is that included in 
the Dolcoath mine, at Glen Creek, and it occurs in a belt of 
greisen which is an offshoot from the main belt of granite, and is 
found cropping up between two belts of slate. 
OA A A 
eae 3 Sf 
Offa 
a 
Plan of country between Doleoath and Butler’s lode, 
a. Granite. b. Greisen.  c. Slates. 
Tt will be seen that offshoots from the main mass of granite are 
found cropping out at the surface between two belts of slate, 
and it is in these offshoots that the main impregnations of tin- 
