DECCAN TRAP. 197 



which rest on a clayey vesicular trap itself in contact with the Lower 

 Kaladgi quartzites. ' 



Patches of shingle^ consisting- of quartzite or quartz, hut chiefly 

 " Eelic " Patches of ^he former, were met with at several points in 

 ®^'"^^^' the trap country in such positions that it was 



evident they were relics of some intertrappean formation which had 

 been removed by denudation, or which was masked from observation 

 by superficial detritus. To the latter class apparently belong the 

 patches of such gravel met with at Kolik and Chiguli (Cheegooleh) on 

 the south side of the great Tillar ravine west-south-west of Belo'aum. 

 This shingle was traced up to the base of the high trap ridge south-east 

 of the former village, on the south side of which ridge is the source of 

 the Malprabha river, but no section could be found showing the shino-le 

 and trap in situ. 



A similar gravel patch occurs at Walmanni, a mile east of Jamboti, 

 and at much the same level relative to the trap-flows. Another in which 

 quartz pebbles predominated, was seen near the western extremity of the 

 great trap spur north-west of Pargarh, some four miles west of Ham 

 Ghat. 



To the first class of such gravels, probably the relics of former 

 inter-trappean beds, belongs, most likely, a large spread of quartzite 

 shingle lying on the surface of the trap on rather high ground, 3 or 4 

 miles north of Yadwad, at a level to which the waters of the Ghatprabha 

 are not likely ever to have risen. 



The curious bed of quartzite shingle capping the Uparhatti hill 

 and mentioned in the note on the opposite page, may also not unreason- 

 ably be held to belong to the class of relics. 



Whether any of the numerous lateritoid rocks that so frequently 

 appear to be intercalated between trap-flows in the high ridges of the 

 ghat region be not of intertrappean sedimentary origin is a problem 



( 197 ) 



