L.OWER SIWALIKS-— SHALE-SERIES. 85 



the Meyongdisa, half a mile south-east of Gudu, a curious ' Pung' 

 or ' salt-lick ' is seen in the shales. Several springs of soft blue mud, 

 probably slightly sulphurous, ooze out at the surface. This is a 

 general rendezvous for wild elephants and deer, which eat the saline 

 mud with avidity. 



On the Dilangso nala, 3 miles from the Meyongdisa, the grey 

 clay-shales are seen to contain several dark layers of carbonaceous 

 shale, in one of which a band of coal occurs. The coal is 18 inches 

 thick, but it seems to thin and die out rapidly, both up and down the 

 stream bed. 



To the north of the Langisso nala, there is another small stream, 

 called the Langator, and not marked on the map. A small coal ex- 

 posure occurs on the Langator, about one mile west of the Meyong. 

 Soft grey to yellow shaly sandstones overlie 5 feet of interbanded coal 

 and soft grey clay. About six bands of coal, from 1 to 8 inches thick, 

 occur, alternating with the clay. The thickness of the bands varies 

 rapidly. Below the coal band come grey-blue to lavender carbonace- 

 ous shales. The whole series is seen to be horizontal for some distance, 

 and then suddenly to dip 6o c W. in a few yards ; but this is probably 

 due to some small landslip. 



In several of the bands of coal large rounded bits of fossil resin 

 or amber, up to 3 and 4 inches in length, are found, suggesting a 

 similar age to the Burman amber-bearing beds, which are believed 

 to be upper tertiary. 



At the mouth of the Diphu nala, and in the Jamuna river, hori- 

 zontal grey clay-shales are seen. Two miles up 



Diphu river. 6 J J ^ 



the Diphu the shales contain one or two thin 

 coal-seams, but the thickest bed of coal is exposed half a mile up 

 the Diphu, and in a small tributary. In the Diphu, below the sandy 

 alluvium, finely banded sandy and micaceous clay-shales occur, which 

 are generally reduced to stiff blue clay in the stream bed. A band 

 of coal 14 inches thick, with 3 inches of brown carbonaceous clay 

 overlying it, occurs in the stiff blue clay, with a dip of 15 S.S.E. 



( 85 ) 



