216 FOOTE : SOUTH MAHRATTA COUNTRY. 



tvnlj in silti. Whichever it maybe, the other blocks are probably the 

 ruins of an overlying bed which have subsided gradually into their 

 present position. I was quite unable to satisfy myself which might 

 be the rock really in situ, but it is very unlikely that two such widely- 

 different rocks could have been deposited in juxtaposition as the blocks 

 now appear. The iron-clay blocks, masses of 3 to 3 tons weight, show an 

 approach to vermicular structure. The knoll occupied by this mixture 

 of blocks is of small size^ hardly more than an acre in superficial area. 



To the south of this knoll extends a plateau occupiod by chert 

 blocks, but the whole is too much covered with black soil to give any 

 good sections. 



Iron-day formations outside of the Trap Area. 

 Beds of iron-clay, very strongly resembling the typical beds above 

 described, or indeed identical in lithological characters, were met 

 with at several points outside the limits of the trap area ; but it is 

 probable that, in most cases, they were once continuous with iron-clay 

 beds unquestionably belonging to the Deccan trap series. 



Certain outliers of the " summit bed^' iron-clay, which are mani- 

 festly mere outliers of that bed overlapping on to elevated parts of the 

 Kaladgi quartzite series, are not here included. 



It was pointed out, when speaking of the iron-clay beds occurring 

 on the south side of the Tillar ravine and the north side of the great 

 Mahadavi ravine (page 311), that they appear to the eye to be again 

 represented by the beds forming the Gauli (Gowulee) plateau south of 

 that ravine. A serious difficulty exists, however, in correlating the two 

 formations, from the fact that the iron-clay of the Gauli plateau rests 

 upon, and passes down into, the weathered surface of the underlying 

 gneissic rocks. No positive trace of the Deccan trap could be found after 

 a very close and laborious search, though, when seen from the north from 

 v^arious points along the lofty Jamboti ridges or from the lower iron- 



( 216 ) 



