23 FOOTE : GEOLOGICAL STRUCTURE OE THE EASTERN COAST. 



but rarely seen here, though so common in the eastern schistose 

 band. The mica schist gives rise to only three hill groups of any im- 

 portance; they are, the group of hills south of Mogalur (Mogulloor), the 

 Kodnikonda south-west of Narrava Gopalpur, and the great hill north- 

 east of Nandana Marrila (Nundana Morrala). Except where hilly, 

 very little rock is seen in this quarter, the greater part of the country 

 beino- covered with red sandy soil of great thickness. It is only in well- 

 sections that the softer schistose beds are, as a rule, seen exposed, for the 

 nullahs do not cut deeply enough into the surface to expose the 

 underlying rock. 



As already stated above (page 13), no connection could be traced with 

 any certainty between the schistose rocks of the western band northward 

 of Gogulapalle and those southward of that place ; there would, therefore, 

 be no use in making mere speculations as to any possible equivalency 

 of several similar beds, even of the most remarkable of the quartzites. 

 Very little can therefore be said of theses chistose rocks, for they present 

 no special features of interest, either geologically or economically. 



The several quartzite beds may be traced often for many miles, 

 showing little change in mineral condition ; but they then disappear, 

 the ridges dying down gently under the surface soil, owing to the 

 thinning out of the hard bands, or the graduation of the whole bed from 

 hard quartzite into a soft micaceous rock. 



It will be seen by the map that an important band of quartzite extends 

 from the valley of the Pal-eru up to and beyond the Musi (Mooshee) 

 river ; they are then lost sight of ; but about 4 miles to the north- 

 east another very remarkable set of quartzites forms the mass of 

 the great Chendalur hill. They in their turn are followed a couple of 

 miles further north by other quartzites in the Ubiahpalliam hills. These 

 two last groups of quartzites are remarkable for being the most northerly 

 development of this variety of rock in this region, and for the peculiar 

 positions they occupy with reference to the other adjacent members of 

 the gneissic system. 

 ( 28 ) 



