MEMOIRS 



OF THE 



GEOLOGICAL SUEVEY OF INDIA. 



GEOLOGY OF THE RAMKOLA AND TATAPANI COAL-FIELDS 



BY 



C. L. GRIESBACH, F.G.S., 



GEOLO&ICAL STTETEY OP INDIA. 



PART 1. 



GENERAL GEOLOGY OF THE AREA. 



PHYSICAL FEATURES. 



The area examined during- the season 1878-79 is situated between 

 latitudes 23° 30' and 23° 55', longitudes 82= 50' and 84°, comprising the 

 north-eastern parganas of the Sirguja state, with some portions of 

 South Rewa, and may roughly be defined as being- the area between the 

 rivers Kunhur and Rer. Within these limits the coal-field is bounded on 

 the south by the great gneissic plateau of Chota Nagpur, the latter rising 

 to about 3,000 to 4,000 feet, with steep escarpments facing the north. 

 Originally the deposits belonging to the Gondwana series may have 

 extended up to that long line of escarpment ; but, the coal-bearing rocks 

 having gradually subsided, the surface of the present lower levels has under- 

 gone extensive denudation by the Kunhur and Rer river systems, and now 

 only patches of Talchirs and sandstones of doubtful age, filling up here 



( 129 ) 

 Memoirs of the Geological Sui-vey of India, Vol. XV, Pt. 2. 



