158 NEREUDDA DISTRICT. 



just left ; there is nothing however to suggest that any fault shifts the 

 beds in any of these places, and thus we find, in descending order, about 



Probable thickness of 130 feet ' of alternating flags and shales, &c. This 

 coal includes two seams of coal 1 foot 6 inches and 2 



feet 6 inches thick, respectively, and separated by about 56 feet of the 

 flags and shales. At the bottom of these 130 feet, some obscurely bedded 

 sandstones come in, which are estimated roughly at 10 to 20 feet thick, 

 and at the base of these a fault has cut off the rock. Taking this set 

 as terminated here, we find on the south side of the fault, (descending 

 both the stream and the geological section) some flags and shales with 8 

 inches of coal, below which 45 to 50 feet of flags and shales, and then 

 a 2 feet 6 inch coal seam occur ; and we have only to suppose the fault 

 above mentioned to have been a downthrow on the north of 140 to 150 feet 

 when we shall find in the 8 inch and 2 feet 6 inch coal bands respective- 

 ly the representatives of the 1 foot 6, and 2 feet 6 bands of the upper 

 series. The average dip is, as in the former case, slight, and the amount 

 of vertical displacement may therefore be taken, here also, as equal to 

 the thickness of the intervening beds, as nearly as need be. General 

 lithological similarities certainly suggest the identity of the two sets of 

 beds ; and although only 45 to 50 feet of flags and shales are found be- 

 tween the 8 inch and 2 feet 6 inch coal of the lower section, while 54 feet 

 of similar rocks come up between their (supposed) representative above, 

 yet such a discrepancy, as well as the difference of 10 inches in the 

 thickness of the smaller band of coal at its (supposed) two out-crops, is 

 nothing more than an acquaintance with the usual manner of deposition 

 of the formation would lead the observer to expect : here however, as in 

 the former case, nothing more than conjecture can be hazarded. 



The only other point in connection with this Rawundeo section to 

 which attention need be called, is that the set of beds described at the 

 bottom of our measured list, which have also been stated to be repeated 

 by a fault, and are about 28 feet thick (including a 3 feet coal seam) 



