;jo8 Morris Morris: 



tlie fault exists, tlie downthrow must have been on the east, where- 

 the younger rock, viz., series c, is preserved. 



The Evelijn Fault. — The Montrose fault, which skirts the western, 

 wall of the Dandenongs, is matched along the eastern wall by another 

 junction, which marks the igneous rocks off sharply against the- 

 Silurians on the east. This junction passes Evelyn about half a mile- 

 to the east. From this point it runs a little east of north, keep- 

 ing parallel with the Montrose fault, two miles away to the west, 

 and like it, separating the series c on the w^est from series h, or,. 

 Avhere this has been denuded away, from the Silurians, on the east. 

 Tracing it south from Evelyn (Plate XXX., Figs, 4, 5), it ends 

 abruptly at the Olinda Creek, but starts again some 250 yards to 

 the east, whence it runs in a direction a little west of south, cutting 

 across the eastern shoulder of the Dandenongs, and severing dacite 

 from hornfels. .fVfter trending about half a mile in this manner, 

 it bears east again, and recovers a course which would conform 

 with the arcuate continuation of the junction, if it had crossed 

 Olinda Creek directly. It therefore appears to have been faulted 

 out of its path at the Olinda Creek. 



The path of the junction across the Dandenongs is marked by a 

 deep depression, referred to in this paper as the ICvelyn Fault 

 Valley. For half a mile south of Olinda Creek, this depression 

 is steep and narrow. (Plate XXX., Fig 4a, Sect. AB). Further 

 south, it forms an equally deep but very broad valley, the two- 

 valleys being separated by a small watershed in the depression. 

 (See Fig. 4a, Sect. CD.) The broad valley opens out southward" 

 upon the upper course of Olinda Creek. I have not traced the- 

 junction south of this point, but on consulting a map of the Woori 

 Yallock basin, by J. Easton, whose map practically begins where 

 mine ends, it appears that if this line is continued in the same 

 direction to Monbulk, it will still mark off the dacites on the west 

 from the Silurians on the east. On the other hand, if the junction 

 were continued at its northern extremity, across the Yarra. it wouM 

 pass along the eastern wall of the western pair of quartzite ridges 

 described earlier. (Plate XXX., Fig. 5.) The Stringy Bark Creek, 

 on crossing this junction in its north-west course, is immediately 

 lost in a wide marsh. The Yarra also, on crossing the place where 

 this junction would occur, expands into an extensive marsh on the 

 left bank. 



Here then is a line separating various kinds of rock, and yet 

 maintaining a uniform arcuate direction for many miles. Evi- 

 dence of depression on the west of it exists at Olinda Creek. (Plate 



