56 



Soft shales are on the flat skirting the eastern side oi 

 the limestone range, just mentioned (dip E. 20 "^ N.), and 

 these are faulted against shales with thin beds of ferruginous 

 limestones which dip S. 20° W. Both these sets of outcrops 

 are at high angles, as seen on the flat, and are also much 

 curved. 



At the road crossing the tributary creek, near the 

 Youangera Spring, flaggy shales dip E. 20° S., at from 40° 

 to 45°. Here a very curious white limestone is seen resting 

 unconformably on the shales. The limestone rolls a little, 

 with anticlinal and synclinal curves, and is eroded where the 

 curve passes above the normal level of the ground. It is 

 compact, somewhat nodular, and includes numerous frag- 

 ments of shale. It is veined with crystalline matter and has 

 manganese oxide stains. Tlie question as to its origin carries 

 some doubt, but it is most probably a travertine limestone 

 with certain unusual features. It is seen on the north side 

 of the creek, and can be traced to the junction of the two 

 creeks, a distance of about 100 yards, beyond which I did 

 not continue my observations. The bed does not seem to 

 rest on calcareous rocks; it is from 6 to 8 ft. in thickness — 

 limestones occur on the scarp face about one-eighth of a mile 

 to the eastward. It seems probable that it is a travertine 

 deposit laid down, at a somewhat distant period, by spring 

 waters fed from the calcareous beds of the scarp that exists 

 on the eastern side, perhaps before the scarp had retreated 

 as far as at present. The creek that has cut its way through 

 this peculiar limestone gives no evidence of carrying any 

 quantity of calcium carbonate in solution at the present time. 

 On the western side of the crossing, in the same creek, there 

 are similar laminated shales as occur above the crossing and 

 are dolomitic, in places: dip E. at 40°. There is also an 

 overlying limestone, on this side, but it is not so developed 

 or so compact as in the higher position in the creek, described 

 above. 



The road, after crossing the creek, has a trend more to 

 the west and passes over a ridge of shales, sometimes cal- 

 careous, which pass under the limestones of the scarp, described 

 above: dip S.E. at 50°. Beyond the last-named ridge, a 

 12-ft. bed of limestone occurs in the shales, followed by flaggy 

 quartzites, which make a bold hill on the western side of the 

 road: dip E. 20° S. at 75°, increasing to 90°. On the other 

 side of the range — in lower ground — the rocks are somewhat 

 broken and have an easterly dip. 



Passing into the valley of the Blinman Creek, shales and 

 flaggy quartzites form the outcrops, the quartzites carrying 

 the fine dark lines similar to those seen in the quartzites on 



