ARCH/RAN. 
162 
wara, is biotite, but well- formed idiomorphio dodocahcdral pink 
pjarncts are contained in one 8])eoimen of au<fen-<i;nei8s, f^arnet 
being also an occasional mineral in the augen-f^neisses of (Jhhind- 
wara. At the northern end of this inlier I found abundant blocks 
of a fine-grained biotite-e|)idiorite, very similar to some of those 
discovered by Mr. I^'ox in the Kanhan valley of ('hhindwara. I 
must not omit to state that the dips in the Khargaon inlier, where 
seen, varied in direction trOm north-west to south-west, averaging 
west to south-west, the angle of dip being 30° to 40°. 
The next inlier to be visited was that of Salba, rising to 
Th- S 11 '1'- 1,785 feet. This was crossed between Mansak 
and Cher (Chare) on the march to Baikanthpur, 
On the ascent after crossing the Dharhund nala, one meets a 
series somewhat similar to that of Khargaon, consisting of crushed 
porphyritic gneisses (augen-gneiss and bead-gneiss) and granulites, 
with interbanded, rather fine-grained, richly hornblendic gneiss. 
The strike is W. N. W., vertical. In the Jhunka Nala between 
Salba and Cher are seen vertical green schists striking east, and 
followed by porphyritic biotite-gneiss. 
The fourth inher to be noticed is that on which is situated 
Patna, the chief village of a zamindari of the same name. 
Th P t ■ I c "^^^ western end of this inlier was visited on 
the march from Baikanthpur via Ani to Rakeya. 
South-east of Ani is a low ridge composed of a siliceo-calcareous 
series of rocks that must be regarded as metamorphosed sediments 
and are probably to be correlated with the Dharwars. The rocks 
vary from a fine-grained quartz-schist containing scattered calcite 
and a certain amount of biotite, through quartzites extremely 
rich in calcite, to siHceous fine-grained limestone. There is also a 
band of diopside-quartz-rock traversed by irregular veins of 
calcite and quartz, the quartz forming small crystals in druses. 
A peculiarity of these quartz crystals is that they frequently show 
the face s (1121) which I have only once 
Quartz crystals. • i f j • t j- i 4.1, 
previously found m India, namely, on the 
quartz crystals found in druses in quartz veins traversing the 
Dharwars in the neighbourhood of C'haibassa in Singhbhum. The 
same face is also present on some of the quartz crystals from the 
sapphire mines of Kashmir. Some of the Ani quartz crystals 
show trigonal terminations like those so characteristic of Deccan 
Trap geodes. 
