48 



belt of dark-coloured oolitic and laminated limestone, 

 apparently brought in, as a repetition of the strata, by a 

 strike fault. The limestones can also be traced up to the 

 great pinnacle of quartzite which cuts them off on the southern 

 side, by a dip fault, the quartzite having an apparent dip 

 of 85°, westerly, on its abrupt face to the west. The outlier 

 of oolitic and laminated limestones, brought in by the strike 



S.E. 



fault, has a dip S. 30° W. at 55°, 

 The junction of limestone against 

 the quartzite on the fault plane, is 

 a rotten brecciated rock. The last 

 solid rock on the limestone side, is a 

 marble (see fig. 1). 



THE GOKGE. 



On entering the gorge the lime- 

 stones are seen to outcrop on both 

 sides of the creek, mostly on the </ 

 southern side, where they form a 

 ridge about 200 ft. high and make a 

 spur, running westward, to the 

 plains, where they pass from view 

 under alluvium and sand. The lime- 

 stone facing the plains has a strike Outlier by complex fault- 

 E. 25° S., dip 45° westerly. The "\g 9.^ ji^^^stones pinched 



T . i i. ii T i. in between quartzites. 



gorge road intersects the limestones 



obliquely to the strike of the beds and supplies an interesting 

 section, as detailed below : — 



(a) The bottom series in the limestone belt begins about 

 half a mile from the entrance of the gorge, resting on thick 

 quartzites which rise to a great height: dip S. 30° W. at 60°. 

 The beds are characterized by a series of dark-coloured oolitic 

 limestones, separated by earthy bands, or beds, which continue 

 as a cliff facing the creek for a distance of 300 yards : dip 

 60°-75°. 



(h) Blue and buff limestones, dolomitic; nodular, 

 stalactitic, laminated ; more rarely, finely oolitic in struc- 

 ture ; white crystalline limestone, passing into white to brown 

 dolomitic marbles, with reduced angle of dip. About 300 

 yards of outcrop. 



A small tributary creek dissects the cliff at this point, 

 making a gap 36 yards wide, but the limestones continue 

 up this creek. 



(c) Pink and yellow marbles continue for a distance of 

 about 50 yards, passing up into very solid and continuous 

 white to buff marbles. Width, 90 yards. 



Another wash-out by a small tributary creek, 75 yards 

 wide, with limestones passing up the creek. 



