TALCHIRS. 15 



This is probably near the local eastern limit of the Talchir basin, 



Original eastern boun- for the exposure is here very narrow, and these 



dar y- rocks do not appear to the east at any of the places 



where the trap has been denuded and the metamorphics exposed. 



To the west of this outcrop the Talchirs are covered by the trap, 



beyond which again they extend uninterruptedly 



Continuation to west. 



as far as the extreme west of the bhahpur field. 

 The actual boundary is not well exposed, but where seen in the 

 streams passing across it near Kharee (E. Lon. 78°43'), Optee (E. Lon. 

 78 41'), Omerghor (E. Lon. 78 38'), and Kamkhera (E. Lon. 78 

 36'), it is quite normal and shows no signs of disturbance ; the dip 

 of the Talchirs in the immediate neighbourhood of the boundary is 

 only 5 to io°. 



Beyond Mirka Dhana (E. Lon. 78 34') the boundary becomes 

 much indented, following the line of the hills to a great extent, but 

 also running into the low ground, as in the Tawa near Mirda Khera 

 (E. Lon. 78 33'). Where the boundary passes across the two 

 streams known as the Ghogra and Kuchar Nalas (E. Lon. 78 22') 

 it is quite normal, and the dip of the Talchirs is slight, to north- 

 io°-west; beyond this the boundary is seen again at intervals to 

 Bisighat (E. Lon. 78 10/), still following the line of the base of 

 the hills. Just beyond Bisighat it takes a sharp turn and runs back 

 again to the east, a spur of the metamorphics running as far as a 

 point to the south of the village of Bankatawa (E. Lon. 78 25'). 

 Along this portion the boundary is very irregular owing to the irregu- 

 lar floor on which the Talchirs were deposited. The Ghogra river, 



just before it enters the metamorphics, runs 

 The Ghogra section. 



along the boundary, and for some distance the 



right bank and the lower 10 feet of the left bank are of metamor- 

 phics, while the Talchir boulder shales rest on the old denuded sur- 

 face of the metamorphics on the left bank. The dip of the Talchirs 

 just here is to the south at io°, while further to the east it is only 6°. 

 After turning west again, the boundary follows for some distance 



( 15 ) 



