kalXdgi series. 131 



At Hudelur (Oodehloor)^ three miles east-north-east of Tuglihal, 

 grey cherty limestone shows extensively. Im- 

 °^^^ ^ ' mediately north-west of the village a large sheet of 



the rock appears^ and presents a somewhat unique appearance from the 

 weathering having formed a continuous surface in the shape of a band 

 of chert an inch to an inch and a half thick, which extends beyond the 

 limits of the unbroken sheet as a capping to various detached patches 

 of the underlying calcareous band. At the bend of the Ghatprabha, a 

 little south-west of the village, is an outcrop of massive, grey, ehertless 

 limestone with concretional structure, which has given rise to a very 

 singular appearance in the weathering of the rock surface. The whole 

 surface seen is thickly studded over with low conical eminences rising 

 out of small hollows and strongly resembling large rough-sheUed limpets 

 or the top valves of Hippuriies. Each protuberance is due to a con- 

 cretional cone, one and a half to two or more inches in diameter and 

 about one inch high. They resemble rather weathered cones of percus- 

 sion, but it is very difficult to imagine what could have produced 

 percussion' in such a position at the end of a very long still reach 

 of the river where no large shingle would be borne along with sufficient 

 impetus even in the highest floods, and such cones of percussion are 

 not seen where other limestones are exposed to very strong currents. 



The two outlying patches of limestone north of the Krishna river 

 at Chimalga (Cheemulga) and Dewlapoor consist mainly of the grey 

 cherty variety, but their stratigraphical relation to the beds in the lime- 

 stone basin proper is very obscure owing to the immense masses of 

 detrital matter and surface soils which mask the face of the intervening 

 tract of country. What evidence there is points to their not belonging 

 to the limestone basin, but to their being a set of beds occupying a similar 

 position to those occurring in the valley of the Malprabha north of ManoH 

 (page 111), which lie between the upper and lower sub-division of the 

 basement quartzite series. 



Q ( 121 ) 



