Chap. IX. ] associated non-manganiferous minerals. 
215 
Except in the case of the Balaghat deposit, where the band of manganese- 
ore in tailing out gives place to limonite, this has not been observed. 
Consequently such occurrences of iron-ores as have been noticed in 
association with the manganese-ore deposits are of particular interest. 
The occurrences to be noticed in association \vith the deposits of the 
gondite series in the Central Provinces are at Mansar, Mansar ExteT?- 
sion, Mandvi Bir and Junapani (pages 885, 892, 970, 976, respectively). 
„ . In all these cases the ore is red hematite, sometimes 
Hematite. . . . , . . , 
massive, and sometimes m the form of aggregated 
small scales of specular hematite. Another occurrence in this series is at 
Kajlidongri in Jhabua. where there is a vein composed of quartz and 
hematite traversing the deposit (page 687). The hematite is in 
micaceous plates up to 2 inches across. But this occurrence, being 
of vein origin, is not to be regarded as similar to those in the Nagpur 
district ; the latter may be the product of the consoUdation and metamc r- 
phism of original sediments, although it is perhaps as probable that in at 
least some cases the hematite is only a secondary introduction. Iri 
the manganese mines of the Vizagapatam district no definite deposits of 
iron-ores are found, but small quantities of yellow ochres are often 
found mixed with the manganese- ores and are also found in irregular 
patches in the lithomargic ' country '. In the 
Limonite. i r i i i 
deposits formed by secondary processes on the out- 
crops of the Dharwar rocks, as in Singhbhum, Jabalpur, Sandur, and 
Mysore, the manganese- ores are commonly associated with iron- ores, usual- 
ly limonite ; in the lateritic deposits also the manganese- ores are almost 
invariably intimately associated with iron-ores, both hematite and limonite. 
Another ore of iron that is sometimes found in association with the 
manganese-ore deposits of the gondite series is 
magnetite. Two occurrences of rocks of these series 
containing magnetite have been foimd. One of these is at Kodegaon 
in the Nagpur district where the mineral occurs in a rock composed 
of magnetite, spessartite, and quartz ; the rock is therefore to be called 
magnetite-gondite. The other is at Kachi Dhana in the Chhindwara dis- 
trict and is a rock composed of magnetite set in a matrix of chalcedony. It 
is possibly a silicifiied magnetite-spessartite-rock.^ Magnetite also occurs 
as a magnetite- quartz-rock associated with the manganese-ore deposit-s at 
1 It h:is not been proved that these magnetites are liOn-mangaDiferous. Consid- 
ering their association they may be mang^mmagnetites. But the individual grains 
of the magnetite are 80 small and so intimately associated with the other minerals 
that it would be a matter of extreme difficulty to determine thi.s point. 
