28 ' ON THE GEOLOGY 



other rock than sand-stone, sometimes ferruginous, sometimes slaty, and 

 sometimes containing mica, until I arrived at Hat, hi, where it changed 

 to argillaceous lias lime-stone. 



At Birsinhpur, in the bed of the small river which runs near the 

 town, is a stratum of red marie or sand-stone, containing laminte of calc- 

 spar, distinctly interstratified ; at Sohaivel, red marie underlies the lime-stone 

 above-mentioned ; at Nagound, in the bed of the Omcron river, its lower 

 and central beds are exposed to view, containing fragments of fossil wood, 

 also fragments of stems of ferns, and one piece exhibited, what I took 

 for an impression of the gryphite shell, which is peculiar to this formation ; 

 at Marhar, near the tank of the old village, it reposes on red marie, in con- 

 formable stratification ; and at Lohargong, the wells of the cantonments 

 exhibit its upper or slaty beds, reposing upon smoky grey lime-stone. 



From Lohargong, I proceeded, via Mehewa, Ghysabad, Hattah, Nar- 

 sinhgerh, and Patteriya, to Sugar. 



The first part of the route, was over an alternating succession of lime- 

 stone lowlands, and sand-stone collines, which continued as far as the Ken 

 river, the bed of which is red marie and stand-stone ; afterwards, the same 

 alternation occurred to Hattah, where the Zme-5^0Me reposes on red marZe, in 

 the banks of the Sonar river, as it does also at Narsinhgerh, in a small 

 ravine north of the fort ; but there the marie is almost entirely green. At 

 Patteriya, it comes in contact with trap rocks, and is thereby changed both 

 in appearance and nature ; those portions which contained most silex, are 

 converted into chert, and it is curious to see specimens, one half of which 

 is chert, and the other half still retaining the property of effervescing 

 with acids. 



The 



