119 



denusive agency, they preserved a somewhat similar bold out- 

 line 011 the east, as the western ones did on the west. It will 

 also be observed that not one member of this series extends so 

 far north as Section 3331 All, with one exception, intersect 

 the bed of the Little Para, and on the south side of the river 

 impart a bolder outline to hill and dale. 



A common character prevails throughout the bands of this 

 series. In a ravine in Section 4191, east of Grawler Town 

 Hill, a very fine section of the eatsern band is exposed, pre- 

 senting a synclinal axis, as represented in diagram I. The 

 rock here is very hard and compact in structure ; and also the 

 massive bedding is exceedingly well defined. In consequence 

 of this fold, as abrasion brought each succeeding bed nearer the 

 surface, so at last when denudation has excavated below the 

 axis of the syncline the band has entirely been removed. This 

 takes place at a distance of less than half a mile north from 

 where it is so fully developed. As will be seen by the map a 

 lateral overlap of this band occurs in Section 1645. Whether 

 this severance of the quartzites be due to original deposition 

 or to dislocation of the strata, as yet I have not been able to 

 determine. Dip of this band, at about 200 yards north of cross 

 section, is 70° east. 



Eastern Isolated Band. — As shown on the map this band is 

 entirely confined within the limits of Munno Para ; its strike 

 bears more west and east than any of the others, and I am 

 inclined to believe that it is only an extensional fold of one or 

 other of the bands to the west of it, from which it has been 

 removed so far in consequence of its low dip, and the depth to 

 which denudation has been carried. On the South Para 

 Eiver it is entirely cut off to the north by abrasive action, 

 the waters of the river having cut a channel into the 

 slate rock nearly 100 feet below the synclinal axis of the 

 quartzite. Throughout the highlands of Sections 3347 and 

 3348 the western limb of this synclinal curve can be also 

 traced to its termination there by the tortuous outcrop of 

 the quartzites. 



A natural section of this band, in a gully a few yards north 

 of the southern boundary of Section 1783, shows a down-throw 

 between two faults. The dip of the adjacent slate is conform- 

 able to that that of the quartzites abutting against either fault. 

 At a distance of a few chains east, how r ever, the westerly dip of 

 the slate gradually changes to the east. The faults, which 

 are here about four chains apart, traverse the country in a 

 south-south-east direction, in such a manner that at no great 

 distance south they become connected as one fault, and that at, 

 or soon after, their intersection, stratigraphical discordance is 

 no longer traceable. 



