CHAP. 4.] KADAPAH FORMATION.—NULLAMULLAY BEDS. 221 
sight of between Gollapully and Shingasanpully, because of the immense accumula- 
tion of debris there. No bedding could be made out where I crossed this valley. 
* Overlying these slates comes a great thickness of quartzites, dipping eastward 
at a high angle and forming a great ridge corresponding with the Davur Conda ridge 
of the map. East of this ridge is another deep narrow valley occupied by slates, 
which in their turn are overlaid by another series of quartzites rising into the lofty 
Tellanela-mulla ridge. 
> At this point the dip is easterly at a high angle, though greatly obliterated by 
cleavage. The quartzites continue to dip east till the head of the Toongoor valley 
is crossed, when they suddenly rise again with a westerly dip. 
“In the centre of the valley a narrow strip of slates hides the quartzites a little. 
These are again underlaid by slates, appearing some distance down the flank of the 
mountain, and abutting against the mica-schist of the old metamorphic rocks. A 
little north of the line of section the overlying quartzites roll over again in a splendid 
curve, but are cut off by the great boundary fault. An examination of the country at 
the north end of the Tellanela-mulla ridge shows that the quartzite beds composing it 
cross over into and form the great Pogulla anticlinal. 
“At the south end of the ridge the beds are seen to sweep round and form a 
shallow synelinal with the ridge east of the Toongoor valley. The underlying slates 
must, therefore, agree with those corresponding slates cropping out from under the 
east side of the quartzite synclinal. As the quartzites of the Davur Conda ridge appear 
to dip conformably under the older slates, and do overlie the younger slates in that 
part of the mountains, it is clear that they are in abnormal position, and in fact 
belong to an inverted anticlinal, as which I have represented them in the diagram. 
The Davur Conda ridge quartzite might, on the other hand, have been brought into 
its present position by faults. 
*In a country where such vast foldings of strata abound, itis easy, and, in 
the absence of any evidence to the contrary, quite legitimate, to explain this and other 
difficulties by referring them to inversions of strata; more especially as several un- 
deniable cases, though on a smaller scale, can be adduced in support. The quartzites seen 
in this Tellanela-mulla section are generally very typical varieties. In the western part, 
the predominant colors are reddish buff, whitish and bluish grey, and the two latter 
colors prevail most throughout the section elsewhere. 
“The cleavage of the quartzite in the summit of Tellanela-mulla ridge already 
adverted to is quite in accordance with the prevalent cleavage of the slate beds, 
namely N. 5°—6°E. ; dip 60°—70°E. 
“The Tellanela-mulla section is obviously not an easily understood one, unless 
compared with the results obtained from examination of the Toongoor and Mylecherla 
valleys, in addition to the section across the mountains from Muddava eastward. 
“By establishing the identity of the Davur Conda ridge quartzite with the 
Konapully g ghat, the Tellanela-mulla and the Pogulla anticlinals, which belong to 
( 821 ) 
