KALADGI SERIES. 135 



The calcareous series resting upon the upper quartzites consists 

 Upper Umestones and ^^^^^st entirely o£ calcareous shales, purplish or 

 ^^"^^®" grey in color, and overlaid by purplish and grey 



argillaceous shales ; limestones only show occasionally and generally in 

 thin bands. In some parts the purple shales are highly ferruginous 

 being richly charged with earthy red hsematite. As a rule, the surface 

 of this series is thickly covered by cotton soil, or by thick, red, ferruginous, 

 gravelly soil (quasi-lateritic gravel) formed by decay of the heematitic 

 shales. Large patches of this red soil occupy various parts of the 

 Shimageri basin. 



The limestones occur more frequently or are accidentally more 



exposed in the western parts, where they lie at the 

 At Murgur. _ "^ 



. base of the series, e. g., at Murgur, near the western 



end of the Jembigi ridge and in the Yenktapur basin, and also in the 



Lokapur basin overlying the red jaspideous breccia in the section made 



by the "Warratsgal nullah in the southern boundary ridge. They are 



grey, white, or bluish in color, and strikingly like the lower limestones 



occurring immediately south of the quartzite ridge at Lingapur. 



In the Arrakeri valley no distinct beds of limestone were observed, 

 but there is a great thickness of calcareous shales of purple or grey color, 

 with occasional laminse of limestone. On these rest shaley beds of 

 the same colors, which show very imperfect slaty cleavage parallel to the 

 axis of the synclinal. 



In the Anathilli basin calcareous shales only were noted. Among 

 them are various very thin beds of rippled shaley quartzite. These 

 occupy the central part of the basin. The beds resting immediately on 

 the upper quartzites are concealed by superficial deposits, detritus or 

 cotton soil. 



No limestones were observed in the Shimageri basin, probably 

 because masked by great spreads of cotton soil and by the red soil above 



( 1S5 ) 



