ii CONTENTS. 



Page. 



band, 25.— Less schistose band, 26. — Garnetiferous band, cupriferous, 

 26. — Eidges of massive gneiss, 26. — Style of the gneiss north of the 

 Penner, 27. — The subordinate quartz-schists, 27. — Difficulty of distin- 

 guishing these from the Cuddapah quartzites, 28. — Lithology and 

 distribution, 28. — The Narasinihakonda quartz-rock, 28. — Finer and 

 compacter varieties about Ingoort', 29. — Micaceous, 30. — Saccharine, 30. — 

 Epidotiferous or pistacitic quartz-rock, 30.— Waxy quartz-schists, rip- 

 pled, 31. — Close similarity to the Cuddapah beds, 31. — Conglomeratoid 

 gneiss, 31.— A gradation in the series evident, 32. — The pistacite quartz- 

 schists, 33. — Ironstone quartz-schists, 34. — Great development of quartz 

 reefs, 35 17-35 



CHAPTER IV.—THE TRANSITION SERIES, CUDDAPAH 

 FORMATION. 



The Cuddapah groups in this area, 36. — Age of the series, 37. — Distribution, 

 37. — Relation to the gneiss, 38. — Obscure members of the series, 38. — 

 In the neighbourhood of Kalahasti, 39. — The Pillameru outcrop, 39. — 

 The Kandra area, 40. — Remnants of a fold involved among and associated 

 with traps, 42. — No cases of association with gneiss, 43. — Faulted to 

 some extent, 43. — Southern end of Cuddapah field faulted, 44. — Gelacapad- 

 Kaluvaj-a area, 44. — Relation to the gneiss, 45. — Appearance of uncon- 

 formity with the gneiss, 46. — Faulted eastern boundary, 46. — Crushing 

 and alteration, 46. — Trap flows, intrusive, 46. — The Kaluvaya ridge well 

 separated from the Veligonda beds, 47. — Continuation of the outcrop 

 across the Pennei-, unconformable on the gneiss, 47. — The Cuddapahs in 

 the Veligonda range, 48. — Faulted against the gneiss, 48. — The rocks of 

 the Veligondas, 49. — C. M. Oldham's notes on the rocks north of the 

 Penner, 50 ....... 36—50 



CHAPTER V.— GRANITIC AND TRAPPEAN ROCKS. 

 The Ojili and Gudiir granite, 56. — Trappean rocks in definite and ill- 

 defined outbursts, 57. — Dykes in the gneiss, 57. — Relation between 

 spheroidal weathering and jointing, 58. — Dykes in the transition rocks, 

 59. — Intrusive traps of Paremkonda, 60. — Irregular outburst of trap, 

 60. — The Kandra outburst, 60 . . . . , 5g go 



CHAPTER VI.— OTHER FORMATIONS. 



(1) Rajmahal Plant Beds, 63.— Mere traces of Upper Gondwanas in this 



area, 63.— (2) Cuddaloee Sandstones, 67.— Difficulty of distinguishing 



these from the lateritic deposits, 67. — Resemblance to, in weathered rocks, 



68.— The Nellore plateau, 69.— More sandy to north of Nellore, 70.— 



