60 BALL : GEOLOGY OF AURUNGA AND HUTAR COAL FIELDS. 



at an angle of 40° to north. Farther east they rest on the limestones and 

 other crystalline rocks. To the west of the road crossings at a distance 

 of rather more than half a mile, the section in the Sukri discloses 

 a lenticular mass of decomposed coaly shale resting on about four feet 

 of blue, pink and yellow shales, and covered by twenty feet of fine white 

 sandstone. 



At thickest, the coaly shale is 2 feet 4 inches, with a rolling dip. 



Beyond this the section alternately discloses 

 Section east of Mooroop. . , . , . 



Barakars, Talchirs and gneiss up to the point where 



the stream crosses the boundary, and does not re-enter the coal measures 



again until a point east of Mooroop is reached, where there is a section 



as follows :— 



Gneiss. 



Grits with quartz pebbles, dip 15° S. W. 



Inside the boundary, on the east side of the river, gneiss is exposed for 30 

 yards or so, and the contact is clearly natural. 



Overlying these bottom beds there are white and grey clays, dip 25° south. 



Interval. 



Sandstones, dip 30" S. 



The map is here wanting in detail, as it does not represent a very 

 decided loop bend in the river, in which flaggy, somewhat ferruginous, 

 shales are exposed. 



These beds possibly represent the Kolherwan ironstone zone to be 



^ , , , presently described. Although the imperfection of 



Coaly zone cut out r j ^ r 



by fault. the section prevents its being traced, it is most 



probable that close by here runs the continuation of an east to west fault, 

 which is well seen in the west. And it is possible that to the cutting out 

 by this fault may be attributed the absence in this section of the Raj bar 

 coaly zone, which is described below. 



The flaggy beds are followed by sandstones with their carbonaceous 



shales. These, east of Mungra, are covered by 

 Ranigani beds. • -, ^^ i i i • i ,1 



soft fine-grained yellow sandstones, which must be 

 referred to the Raniganj group. 

 ( 60 ) 



