CHAP. 4.] KADAPAH FORMATION.—NULLAMULLAY BEDS. 239 
assign to it. The limestone beds of the west side of the synclinal were best seen about 
half way between Mullapoor and Junnapaleherroo; they are about 50 yards thick 
across the strike, including the small intercalated slate beds; but to the north near 
Mullapoor they have disappeared and been replaced by slates, excepting a few little 
beds 2 and 3 inches thick which are exposed in well-sections south of the village. "The 
limestone beds of the east side of the synclinal also disappear and are probably replaced 
by slates. I could not trace any limestone at either end of the hill lying east of 
Mullapoor village, which hill occupies the position in which the continuation of the 
limestone beds should occur. 
“The beds just described overlie the Yanegayconda ridge quartzite bed. Under- 
lying this quartzite bed (apparently atleast) is a series of small limestone outcrops 
(very likely the different re-appearances on the surface of a single bed) which extends 
at intervals from the south-east end of the Mullapoor hill past Junnapalcherroo, 
almost as far south as Bassinapully village. This limestone is of grey or dirty-white 
color and not very pure, being mixed with small lenticular patches of slate like 
flattened clay galls. This bed is so slightly exposed (only a few inches above the 
soil) that I could not satisfy myself as to its positive relation to the great anticlinal 
curve of the Bassinapully hill. 
“ Another small bed of crystalline limestone occurring about half a mile north of 
the village of Vungapaud, and at the west side of the Mullapoor hill, though but of 
small size, is noteworthy ; it would furnish a handsome marble, being of small grain 
and of a pretty pink and grey color with green (chloritic) lamine. This bed 
unquestionably underlies the Yanegayconda quartzite bed. At the foot of the 
west end of the Yanegayconda itself is a small indication of grey crystalline lime- 
stone occupying a very similar position with the last named bed relatively to the 
quartzite bed. 
“The beds forming the broad flat plain traversed by the Gundlacumma to the 
north of the Yanegayconda ridge consist mainly of pale bluish-green or pale-grey 
slightly talcose slates with much silky lustre. These slates are generally well bedded. 
The lower slate beds, however, viz., those more immediately overlying the Yanegay- 
conda quartzite bed, are of dark brownish or greenish-grey, passing at some places 
into a silicious schist. There are probably numerous small beds and laminæ of 
limestone scattered about among the slates of this valley, their presence being 
indieated by large quantities of kunkur in all shapes, massive, stalactitic, and pisolitic. 
“ The plain of the Gundlacumma valley is in this north-east corner of the south- 
west quarter-sheet (76) broken only by a few small low hills lying between Noydopulla 
and Shetanagrum Agrarum. Three of these are very interesting because of their 
shape and structure; for they form very perfect elliptical domes of rippled quartzite. 
These -quartzite beds occupy apparently the same position as. the Yanegayconda 
quartzite bed; but they differ rather in their petrological character, which is that of 
( 239 ) 
