TALCHIRS. 17 



Further to the west, the boundary is not particularly well exposed, 



but so far as can be seen, it presents no pecu- 

 Machna fault. ,■»»-, 



liar features as far as the Machna river, where 



it runs into the continuation of the Machna fault, accompanied by 

 quartz breccia, which can be traced into the metamorphics for some 

 distance beyond the limit of the Talchirs ; it then follows this fault, 

 the Talchirs being much disturbed and hardened by the infiltration of 

 silica wherever they are seen in the immediate neighbourhood of the 

 fault. By Amdhana west of Shahpur, the boundary leaves the fault 

 and turning north follows the line of the base of the hills till it is 

 covered at the extreme west near Dardhari by the trap. 



The only places along the whole of this line where there is any 

 Boundary one of de- direct evidence of faulting are, in the section 

 posltlon ' near Lonia, east of Matiardeo hill, and near 



Karanji where there is perhaps a continuation of the same fault, 

 which may, however, be accounted for by slipping on a steep surface 

 as a merely local phenomenon ; besides this we have the fact that 

 there are numerous inliers of metamorphics and outliers of Talchirs 

 along the boundary which together with the irregular character of the 

 boundary in parts, entirely shuts out the possibility of the boundary 

 being to any great extent a faulted one, and suggests that the floor of 

 deposition must have been very irregular, and along a great part of 

 the line sloped away gradually towards the north from the bound- 

 ary. 



The fault running past Lamti (E. Lon. 77 56') has of course 

 nothing to do with the question of a great fault along the boundary, 

 and has merely come to form a portion of it by throwing the Talchirs 

 down to the south and thus protecting them from the effects of 

 denudation. 



Mr. H. B. Medlicott in his reports 1 on this ground has pointed to 

 the probabilities of this southern boundary being one of original 

 deposition, modified by a subsequent gentle rise of the ground to the 



1 Mem., Geol. Surv. India, X., 176, & Rec. VIII, 3, 76. 



c ( 17 > 



