62 



dipping slightly E. of N. at 45° -50°. Tliis hard back 

 is underlain by softer beds, which, by weathering, cause a 

 nick in the summit, and is followed by another hard quartzite 

 bed, at a somewhat oblique angle to the range, which makes 

 a second peak, followed by softer beds with a second nick at 

 the summit. By these alternating hard and soft beds placed 

 on the oblique the range is cut down, at intervals, to about 

 half its height, forming a succession of house-roof structures, 

 giving the range the appearance of the teeth of a gigantic 

 saw. The supposed resemblance of the depressed area between 

 the peaks to a succession of "bunks" has suggested the name 

 "Bunkers." Mount Lucius, a ''trig." hill, is the highest 

 point of the range. 



On the southern side of the Nildottie Range, the hills 

 have a rounded form from the weathering of purple shales; 

 they are free from trees but covered with herbage. A little 

 further to the north-west, in the neighbourhood of the Wil- 

 ligon Creek (mentioned above), the quartzites form the 

 southern side of the range and make a great southern escarp- 

 ment. At the Nildottie Gap, where the two ranges converge, 

 the rocks are much broken, with very steep dip slopes on 

 the Nildottie Range, to the eastward, and a throw-up of 

 calcareous beds between the converging ranges. There has 

 been a contraction of 'the earth mass, producing folding of 

 the valley beds and the bringing together of the two ranges 

 at the ''gap," which has been kept open by the erosive 

 action of the Artimore Creek. Strong limestones outcrop in 

 the Angorigina Creek on the eastern side of Blinman. 



VII. Western Side of Blinman. 



About 1 mile from the mine, on the more northern 

 road from Blinman to Parachilna, there is an outcrop of 

 gneissic granite in large rounded boulders, and on the western 

 side of the granite is a wide basic igneous dyke. Other basic 

 intrusions are seen at intervals going west. 



About 2| miles from the mine is another outcrop of 

 granite, in large spheroidal boulders, and a basic dyke, run- 

 ning east and west, apparently as a continuation of the same 

 line of igneous activity as that mentioned in the previous 

 paragraph. The associated rocks are greatly altered. Close 

 to the granite is a broken and altered dolomitic bed, which 

 is intimately permeated with hematite and a little copper. 



About a mile (or little more) to the south-west of the 

 above outcrops is a very large deposit of lamellar hematite 

 (specular iron) in beautiful crystals mixed with side rite. The 

 adjoining country rock consists of dolomitic limestones and 

 flags. 



