16 



Account of Minerals 



[July 



II. — List of Minerals for presentation to the Society^ collected from 

 vai'ioxLS pa?'fs of the Nizam s territories, Ceded Districts, Kurnool, the 

 Southern Mahratta Country, Mysore, Sfc.—By Lieut. T. J. Newbold, 

 Light Infantry. 



No. A. Gneiss of Dummul at the base of the Kupputgode hills, 

 Southern Mahratta Country, the weathered transition gneiss of Christie. 



Xo 1.— B. Not weathered variety, same locality, with pale rose- 

 coloured felspar. 



2. — Mica schist, compact variety, Kupputgode hills. Before the blow- 

 pipe, j^er se, in the platinum forceps, this rock fuses into a black enamel. 



3. — Yellowish brown jaspery chert, same locality as the above, used by 

 Hyder and Tippoo for gun-flints ; fracture conchoidal, translucent at 

 edges. 



4. — Basanite, or flinty slate traversed by quartz veins, associated with 

 the schists of the Kupputgode range. 



5. — Lateretoidal rock, into which the higher and more ferruginous 

 portioEs of the schists, composing the Kupputgode hills, pass. 



6. — Black oxide of manganese, combined with oxide of iron and alu- 

 mina ; with decomposing quartz and felspar veins : thee xterior exhibit- 

 ing a disposition to the bo'ryoidal structure. 



7 . — Variety of the above- 



8. — Do. do. 



9. — Porphyritic chlorite rock. Pale rose-coloured crj^stals of felspar 

 imbedded in a siliceous paste, coloured by chlorite ; some of the crystals 

 decomposing into a whitish clay. This rock is associated with the 

 siliceous chlorite schist of the Kupputgode hills. Although, petrogra- 

 phically considered, it might be correctly pronounced a porphyry, yet I 

 have preferred the name just given it, as more in k^ep^ng with the geo- 

 gnostic position of the rock. This ro' k I have seen in variou? parts of 

 Mysore and the Ceded Districts, associated with granite and the primary 

 schists. 



10. — A. Chlorite slate, same localitj'. 



10. — B. Do. siliceous variety, exhibiting the tendency of this rock to 

 split into rhomboids. 



11. — Siliceous mica slate, same locality, showing traces of copper. 



12. — White sub-crystalline limestone — the more granular varieties 

 closely resemble Carara marble— in veins in the schistous diorite, Kup- 

 putgole range. 



13th.— Do. do. altered in colour, near line of contact with the slate. 

 14th. — Rhomboidal calc-spar, same locality. 



