60 BALL: GEOLOGY OF THE RAJMEHAL HILLS. 



were taken from the same culminating point on the same hill, but on 

 different sides. 



The following two sections will serve to further illustrate this, 

 though the second affords but an imperfect record. 



Hill south of Simra and west oe Bora Ghat. 

 Section ascending from north-west comer, Simra Bungalow taken as zero. 



1. White and pinkish sandstones and grits (Damudas) ... 300' 



2. Trap, including a thin layer of sandstones 3' to 4' from hase l&Qt 



3. Concretionary shales (variegated) ... ... 3' 



4. Trap ... ... ... ... .... 18' 



5. Very thin black shales 



6. Trap to peak of hill ... 



:. } » 



51V 



At the eastern end of the hill the section is as follows : — 



1. Damudas ... ... ... ^ 



2. Trap ... ... ... ... > 256' 



3. Sandstone ... ... ... ) 



4. Trap ... '... ... ... ... ISO 7 



5o Sandstone... ... ... ... ... 4' 



6. Trap, no shales seen ... ... ... ^. 100' 



SIO* 



Here we have in the first section the first appearance of trap at 210 

 feet below the summit, while in the second it stands at a level of more than 

 254 from the same point. This difference, it should be remarked, is not 

 due to any disturbance or inclination of the beds of trap (or, if at all, to 

 a very trifling extent), but to the variation in the thickness of the flows 

 consequent upon the irregular character of the surfaces upon which 

 they were deposited. 



( 214 ) 



