NOTES ON THE CREMORNE BORE. 453 
The chocolate shales were struck at a depth of 943 feet 4 inches. 
The surface level at this bore was fifty-four feet above the sea. 
(11.) Second Cremorne Lore.—In consequence of the coal in the 
seam struck at the first bore having been damaged by the dolerite 
dyke, the syndicate resolved to put down a second bore, and with 
a view of avoiding the dykes in the second bore, applied for a 
geological survey of the neighbourhood with the object of deter- 
mining the exact trend of the dykes. An examination was 
accordingly made by the Geological Survey, and it was found by 
the authors that a dyke of dolerite about five feet wide outcropped 
near the first bore, dipping towards the borehole at a rate which 
would make it approximately intersect the bore at the depth at 
which the dolerite dyke was actually encountered in the bore. A 
subsequent examination by one of the authors led to the discovery 
of a second dyke, trending so as to almost exactly intersect the 
spot where the bore was commenced.* 
The site for the second bore was accordingly placed as far as 
possible from the outcrops of these two dykes, though the boun- 
daries of the Syndicate’s property did not admit of its being 
distant more than a quarter of a mile from either outcrop. At 
a depth of 2,917 feet a seam of coal was struck, which proved to 
be ten feet three inches in thickness. The upper eight inches of 
this seam was slightly damaged through the action of superheated 
water carrying mineral matter in solution from the dyke, but the 
remainder of the seam proved to have been quite unaffected by 
the dyke, and the analysis of the coal shows it to be a steam coal 
of very good quality. The following is a section of the seam :— 
Roof, clay shale. 
Feet. Inches. 
0 1 coaly clay shale. 
0 8 splint coal somewhat inferior, with minute veins 
of calcite (?). 
2 10 coal splint and bituminous of good quality. 
* Annual Report, Department of Mines and Agriculture, 1892, p. 109- 
110—Report by E. F. Pittman, a.z.s.u., Government Geologist. 
