378 PROCEEDINGS OF SECTION C. 



occur is about thirty miles west — slightly north of a direct west 

 line — extending from east to west thirteen miles and from south to 

 north ten miles ; they embrace a total area of 130 square miles. 

 They include ( 1 ) the long known stratified "Triassic" sandstones and 

 leaf beds, containing Ganganiopteris, Schizoneura, Zeugophyllites^ 

 &c. ; and on the south and east (2) the conglomerates described and 

 attributed to glacial causes by Mr. R. Daintree, and Sir A. R. C. 

 Selwyn, 1866, and further described by Mr. E. J. Dunn, F.G.S., at 

 the A.A.A.S. meeting in 1890; (3) the so-called older Tertiary 

 boulder-clay or till, and the so-called moraine profoiide, the supposed 

 two distinct glacial deposits of Messrs. Officer and Balfour. As 

 might be expected, these rocks are not present on the surface of 

 the whole of this area, but the rivers and creeks have eroded their 

 course deep down into and through the upper beds and into the 

 lower, in some places to a depth of over 500ft. Down these slopes 

 and valleys (though it is weary work) examination of the upper, 

 middle, lower, and bed rocks is practicable. The newer rocks met 

 with on the higher siimmits are the newer and older basalts which 

 cap several of the greater elevations, and have once nearly covered 

 the whole area within the given boundaries. Underneath them we 

 meet with Miocene rocks, containing Laurus Werribeensis, ike, and 

 recently we have obtained a considerable variety of fruit casts in 

 the ferruginous sandstones. They lie directly but unconformably 

 on the Triassic sandstones of the earlier geologists, and above the 

 conglomerates of Messrs. Dunn and others, the two latter of which 

 in turn lie directly and unconformably on the almost vertical 

 denuded, deejily grooved, smoothed and striated surfaces (the 

 roches mmUonmes of Messrs. Officer and Balfoxu-) of the upturned 

 edges of the Silurian rocks, the general direction of the striae on 

 these surfaces being from S.W. to N.E. In a few places they rest 

 on granite. 



We have referred at the beginning of this paper to the junc- 

 tion of these two ; this jimction has been observed at the follow- 

 ing points among many others : — Werribee Gorge, Pike's Creek, 

 Lerderderg Ranges and River, Korkuperrimul Creek, junction of 

 Werribee and Myrniong creeks, between Parwan Creek and 

 Melbourne and Ballarat line, in cuttings on line ; and at nearly all 

 the places where we have been able to remove a portion of the super- 

 incumbent rock from these upturned ed2:es one or more of the 

 features referred to, often all of them — the groo^-ings, striae, 

 polishings,and occasional very small fractures — have been observed. 

 The groovings are usually in the direction of the strike of the 

 underlying rocks, and form rounded ridges from Sin. or.4in. to 

 double that width and over. When, however, it rests upon granite, 

 as it does at Werribee River and Myrniong Creek, at points about 

 one mile above their junction, fragments of granite are sometimes 

 included in the lower bed, viz., that lying directly on the granite, 

 while at. other places the granite has a worn appearance. We 



