212 POOTK : SOUTH MAIIRATTA COUNTRY. 



The only case in which evidence was obtained showing that an 

 Iron-clay of sediment- iron-clay bed was of sedimentary origin was noted 

 ary origin. ^^ Chapoli (Champolee) on the north side of the 



Mahadayi ravine. The iron-clay there forms a very well defined plateau 

 on the high spur south of the village. The sides^ which are well 

 scarped^ show a thickness of from 15 to 20 feet vertical of the tubulated 

 variety of iron-clay, the tubulation being very strongly and clearly 

 developed. A number of quartz pebbles were here found imbedded in 

 the clayey mass, from which it may be inferred that this iron-clay 

 represents, either wholly or in part, an altered intertrappean pebbly 

 clay of the kind described in various typical intertrappean beds. 



Along the south side of the great Jamboti ridge, on the path 

 leading from Chikleh (Cheekleh) to Amoteh, are several alternations of 

 iron-clay and basalt at different levels in the jungle^ the former apparently 

 forming distinct terraces which might correspond to altered trap-flows 

 or intertrappean beds. Unfortunately no sections were found en passant 

 by which it could be decided whether these terraces did really represent 

 distinct formations. 



Three sets of small iron-clay plateaux occupying rather lower levels 



Lower-lying iron-clay ^^^^ *^°^^ °^ ^^® Watershed series occur respect, 

 plateaux. j^gj^ -^^ ^^^ valleys of the Markandeya, Tambra- 



parni, and Ghatprabha rivers. Those of the first and last sets form 

 small groups of strikingly flat-topped hills, in the former case near 

 Unehgaon (Oonchgaon) on the Belgaum-Vingorla road, in the last to 

 the southward of Arkur; all these hills are nearly perfectly bare of 

 vegetation.^ 



Similar minor plateaux occupying the same relative level occur in the 

 upper parts of the valleys of all the other rivers flowing from the ghats, 



* They were only looked at most cursorily, and no information was gained as to what 

 the iron-clay may have heen derived from, 



( 212 ) 



