THE TRANSITION SERIES. 45 



schists and traps alongside of them, but they are certainly not seen to 



lie naturally on the gneisses from and at which 

 Belation to the gneiss. . n <> -i • 



they are dipping as lb were along lines or faulting, 



though the general outlines of the boundaries seem to be curved. The 

 southern end is cut off in great part by the east-north-east line of fault 

 striking out from the Veligondas at Rapur. To the west of the patch 

 the hornblendic schistose rocks of the plain and the small ridges of quart- 

 zites are much traversed by west-by-north to east-by-south dykes of 

 greenstone, and the main ridge itself is underlaid in part and cut by the 

 same rock. The east side is again bordered, with an interval of grani- 

 toid and schistose rocks, by a strong ridge of quartzite breccias and con- 

 glomerates towards Govindapully, beyond which are schistose gneisses 

 with many intercalated small flows of trap and bands of quartz-schist 

 hardly to be distinguished from Cuddapah quartzite. These quartz-schists 

 are, however, essentially micaceous, and are much charged with epidote 

 in little separate assemblages of crystals, or in minute particles 

 when the rock is of a green colour. These quartzites are dipping at vari- 

 ous angles to the eastward, and strike with the curve of the two southern 

 ridges, making a bifurcation round the bay of gneiss and traps to the 

 south. 



The Tumoy arm is not continued across the Tummalatulapuru stream, 

 but the smaller quartzite ridges to the west of it are traceable north- 

 wards very nearly to the next strong outcrop of transition beds extend- 

 ing as a narrow curved ridge from Paremkonda to Kaluvaya, while these 

 smaller ridges and the southern end of the Paremkonda ridge are flanked 

 on the western side by a strong band of gneiss and granitoid rock. The 

 smaller ridges are, however, in many cases so doubtfully either of crys- 

 tallines or transition strata, that I have thought it best to rank them as 

 of the former series, thus leaving a gap between the Gelacapad and 

 Paremkonda outcrops. 



From the latter place to Kaluvaya the outcrop is very decided, the 

 beds of the ridge being good quartzite sandstones and conglomerates of 

 unmistakable Cuddapah facics, lying with an eastward dip against 



( 153 ) 



