•A HUGHES : SOUTHERN COAL-FIELDS OP REWAH g6"nDWANA BASIN. 



troubles should properly be placed. The maps are now fifteen to twenty 

 3'ears old, and considerable changes have takeu place since they were 

 completed. 



The task of writing this memoir has been committed to my care, but 

 the observations embodied in it are the result of the joint labours of my 

 colleague Lala Hira Lai and mjself. At the outset of the survey, he 

 was entrusted with the examination of the Metamorphic, Talchir, Lameta, 

 and Trappean boundaries, but during the last two seasons he was appor- 

 tioned a share of the more arduous and more 

 Anthorship of memoir. . . , 



important task of prospecting tor coal and tracing 



the limits of the Barakar group in the Korea and Jhilmili States. 

 Without the aid that he ungrudgingly gave, it would have beeD most 

 difficult in face of the many interruptions that Lreceived to my more 

 legitimate work, to have completed in so short a time the survey of the 

 large area which engaged our attention. 



SECTION II. — PHYSICAL DESCRIPTION. 



Th^e area described in this memoir forms a portion of the great 

 central basin of Gondwana rocks occupying a large part of the country 

 drained by the Son and some of its southern leading tributaries and 

 principally comprised within the limits of the Rewah State. 



In touching upon the various phj'sical and geological features, I 

 have been guided in selecting a starting-point by the circumstance that 

 Description proceeds the western end of the basin is nearer to the 

 from west to east. ' stat j on 0 £ the East Indian Railway, whence our 



annual departure for our season's work took place. It would have been 

 as easy, so far as describing them was concerned, to have commenced in 

 the east, but this would have been an inversion of the order in which 

 the survey was actually carried through. 



The range of our observations extended proximately for a distance 

 of 150 miles from Long. 80° 45' E. to Long. 82° 55' E., and I have 

 been able to add the link required to connect the 



A l'Gfl su r vcy eel ■ 



investigations of MM. Hacket and Mallet in the 



( 140 ) 



