70 E, 0* Teuie: 



Notes on the Maps. 



Wellington District, Map 1. 



The area contained iu Map 1 comprises about 9() square miles of moun- 

 tainous country in a region previously unmapped geolog-ically, except for ^ 

 sketch map by Reginald Murray, issued in 1884, scale, 2 miles to an inch. 

 Though the topography was roughly sketched in by him from n)ain 

 vantage points, very little of the area included in this* map was examined 

 geologically, hence as the margins of this region were mainly Uppar 

 Palaeozoic, he assumed that these rocks probably covered the whole area, 

 A land survey was made some years ago of a limited portion centring round 

 the serpentine rocks. The blocks were not permanently taken up, and 

 only about one boundary fence was ever put up, so that very few points 

 or lines other than parts of the Wellington and Dolodrook river courses 

 oould be definitely recognised in the field. These, however, were made 

 use of, and formed the basis from which the existing map was constructed. 



The important central portion, which includes the Cambrian and Ordo- 

 vician inliers, has been accurately traced and mapped. The otitlying topo- 

 graphy has been determined approximately by a combination of rapid com- 

 pass traverses, assisted by plane table methods from suitable vantage 

 points. 



Hickey's Creek Bcgion, Map 3. 



The only topographical basis for this map was the position and course 

 of the Macallister River, obtained from the county map. The road was tra- 

 versed by myself, and the rest of the features sketched in — in part by^ 

 plane table methods and rapid compass traverses. Murray's Sketch Map 

 also included this district, but no details concerning important structural 

 features were shown. 



Nowa-Nmva — Buchan District, Map 4. 



This is another area little known geologically^, with a very imperfect 

 topographical basis to work upon. The main streams, such as Boggy- 

 Creek, Ti-Tree Creek, Yellow Water Holes Creek and Tara Creek, have 

 been definitely located by Government surveys, and the roads and settler's 

 blocks as indicated provide some fixed points from which to work, but 

 Dractically the whole of the Tara Range, from its termination in the S.E., 

 near Mt, Nowa-Nowa, to where it passes out of the map in the N,E,, has 

 only> two fixed points shown in any of the existing maps, namely, the two 

 trigonometrical stations of Mt, Nowa-Nowa and Mt, Tara. 



The only other geological map which includes this area is the general 

 map of Victoria, 8 miles to an inch, I understand there are some unpub- 

 lished sketch maps in the hands of the Geological Survey of Victoria, upon 

 which this portion of the general map was based, but I have not seen 

 them. 



The author spent about five weeks in thLs district, which covers an area 

 of about 200 square miles. It was traversed on foot, single handed, so that 

 though the boundaries indicated are all my own, they are necessarily only 

 very approximate. 



