552 



siliceous limestones run parallel with the main limestone, on 

 its eastern side, and cover considerably more ground. 



Behind the house of Mr. William Gray (situated on 

 Block B, immediately in front of Sec. 202) a cave occurs in 

 the main limestone. The cave is easily accessible, and can be 

 penetrated to a length of 27 yards, when the passage contracts 

 and has not been explored further. The walls, roof, and 

 floor of the cave are covered with a stalagmitic coating of a 

 dull, dirty colour. The limestone in the neighbourhood 

 makes a considerable spread and has a dip W. at 54°. At 

 Mr. Mark Gray's hut, near the headwaters of Spring Creek, 

 the limestone series forms a hill 200 feet in height, the stone 

 varying in colour, being bluish, whitish, or pinkish at various 

 zones. This belt of limestone forms a continuous outcrop 

 in a north and south direction on the western side of Mount 

 Remarkable for a distance of about eight miles. At its 

 southern extremity it is cut off by a fault at the south-eastern 

 angle of Sec. 310, and at its northern end it is also deter- 

 mined by a fault which intersects it in Mallee Creek (a 

 tributary of the White Mine Creek), in Mining Section No. 

 1521. Throughout its course it is underlain by Tapley Hill 

 shales and overlain by purple-slates and quartzites. 



(b) THE LIMESTONES IN THE NORTHERN OUTCROPS. 



The settlement of the beds at the northern end of the 

 mount was accompanied by crustal adjustments which 

 destroyed the continuity of the beds, produced repetition in 

 their occurrence and threw the respective faulted segments 

 into various angles with respect to each other. 



1. The most westerly outcrop of the limestone in this 

 area forms a fragment, about a quarter of a mile in length, 

 that has been torn from the limestones in their regular north 

 and south strike on the western side of the mount and placed 

 at right angles to the same. The limestones follow a fairly 

 direct course until they reach the Mallee Creek, in the upper 

 part of which they are undisturbed and make a considerable 

 exposure; but shortly before reaching the White Mine Creek 

 (of wh'ich the Mallee Creek is a tributary) the beds are faulted 

 and the severed portions have taken the form of the letter ~l 

 in relation to each other. The faulted fragment has a due 

 east and west strike, rising to the ridge overlooking the 

 Spring Creek, and ends on the slopes facing the Jatter. It is 

 remarkable how little disturbance has been caused in the 

 surrounding beds by this important crust movement. The 

 faulted limestone has a dip to the north and is overlain by 

 thin-bedded shales and quartzites of the purple-slates series, 

 which at a short distance from the plane of fracture have a 



