268 T. S. Hart : 



in mind that remnants of the glacial series are also found west 

 of it. 



A note to Daintree and Wilkinson's map of 1866 (|-sheet 

 12NE), states that the basalts seem, to have floAved over a steep 

 declivity, and further noi*th the accompanying section sho^vs 

 inclined beds of the early tertiary rocks. These compara- 

 tively steep beds are in contact with a. mass of intrusive older 

 volcanic rocks, and I had the impression fomnerly that the in- 

 clination was regarded as an effect of the basaltic intruf-ion, but 

 I do not find it described as such. West of tho disturbed portion 

 the tertiaries continue at higher levels and horizontal, aaid a 

 better explanation is that at this point on the north side of the 

 Werribee there is a monocline probably faulted and further south 

 along the edge of the high basaltic plateau, a. fault ■scarp over 

 which the lavas have flowed. It continues further south still 

 with a curve a little to the west, and the quarter-sheet 12SE to 

 the south shows the Ordovician rocks terminated a straight line 

 which is also the edge of the higher land to the w^est. Down 

 this a number of -bhort steep valleys flow. The aspect of the 

 locality as see^n from any point of vantage to the north agrees 

 with this. As the line of fa\ilt passes between the old town- 

 ship of Rowsley and the railway station of the same name I 

 would call it the Rowsley fault. 



On the east or depres-sed side the surface of the plain below 

 is overspread with detrital material. This evidently is material 

 carried by the streams down their steep courses from the high- 

 land, but which they could not transport across the plain. Tli© 

 Parwan Creek hais cut its valley down to the ba-se of the present 

 wall, but with its slighter fall it has not cut through the basalt 

 on the lower country. Its level is here temporarily kept up, 

 and it has attained a gentle sloiie in its bed above the obstacle, 

 and being in soft material of the old estuary has long gentle 

 slopes on the sides of the valley, rising gradually to a basaltic 

 escarpment, Avhich is sometimes over a mile fnun the main 

 waterway. Iklow the escariimcMit the slopes are strewn with 

 broken basalt from the plateau edge, undermined by the working 

 away of the soft sands below, but unable to travel down the 

 long gentle slopes. The head of the Parwan tributary neai" 

 Ingliston station shows an earlier stage in the development of 



