IGl FERMOR: GEOLOGY AND COAL RESOURCES OF KOREA, C. P. 
CHAPTER IV. 
THE ARCHAEAN ROCKS. 
As will be seen from the geological map, there are numerous 
inliers of Archaean rocks in this State. A brief account must 
first be given of the petrographical composition of such of these 
inliers as it was possible to visit. We will then discuss the rela- 
tionship of the Korean Archseans to those of the Satpuras further 
west. 
The first inlier to be visited was that of Phunga in the S. W. 
corner of the State. This hill mass is of very irregular outline, 
^, . ,. and rises to a height of 1,671 feet. It is 
. The Phunga mlier. ... j f t • j x 
entirely composed, as far as 1 examined it, of 
a medium- grained hornblende-granite with red felspar. The rock 
shows no noticeable gneissose structure, but is seen under the 
microscope to be exceedingly crushed and strained. One leucocratic 
variety was collected in which the hornblende was small and 
scarce, the rock itself showing a tendency to gneissose habits. 
The next inher to be visited was that on which is situated 
, . ,. the large village of Khargaon, the headquar- 
The Khargaon inher. ^ .° ^, ■ i ■ e ^^ 
ters of the zammaari of the same name. 
This mass was traversed from Khargaon in an N. N. W. direction 
towards Chirmiri. The rocks examined consist of a series 
of crushed biotitic gneisses, in a general way very similar to 
those examined in detail by Mr. Fox and myself in the Nakta 
Nala, Chhindwara district [Rec, G. S. I., XLIII, p. 34, 1913). 
They vary from an augen-gneiss, through more crushed varieties 
of the same, analogous to our bead gneisses, to a biotite granulite, 
and finally to a dark grey quartzite-like rock containing scat- 
tered specks of pyrite and. found under the microscope to consist 
largely of an aggregate of quartz and felspar with minute biotite, 
epidote, and a black ore, probably ilmenite. There seems to be 
every gradation between a coarse augen-gneiss and this fine-grained 
pyritic granulite, just as in the Nakta Nala there is every grada- 
tion between coarse augen-gneisses through bead-gneisses, necklace- 
gneisses, and granulites, to homstone-gneiss, which seems to be an 
even more intensely crushed rock than any of those of Khargaon. 
The original ferro-magnesian mineral of this series, as in Chhind- 
