REPORTS OF RESEARCH COMMITTEES. 307 



In the same volume Dr. Summers mentions the occurrence of 

 essescite near Kyneton. 



Since 1914, a considerable number of additional types and 

 occurrences of alkali rocks of various kinds in Victoria have come 

 under the writer's notice. Most of them he has found in the 

 field, while others have been submitted to him for examination 

 and report. No description, however, of these rocks about to 

 be referred to has yet been published. 



The recks occur in Western, in Central, and in Ncrth-eastern 

 Victoria. 



From Western Victoria, the writer found some years ago an 

 aboriginal quarry a few miles south from Mt. Staveley and among 

 the material, apparently not '"in situ," was a phonolite or allied 

 rock containing soda-sanidine, aegirine augite, probably scdalite 

 and radial zoolites. 



At a students' Geological Survey camp in January, 1914, in the 

 Casterton district, a dyke of quartz oligoclase trachyte was found 

 on Gilbca's Hill, parish of Wando. In another locality in the 

 same parish a small lava flow of a trachy-phonolite was found, and 

 en Deep Creek, also in the parish of Wando, another lava flow cf 

 trach3''-phonolite was noted. In the same parish, a small basic lava 

 flow was found to contain small crystals of nepheline, and is ])ro- 

 bably a nepheline basalt. 



From Central Victoria, in the Macedon district, a small flow 

 of trachyte running south from the Camel's Hixmp, which had 

 escaped previous notice, has beeft observed recently owing to the 

 formation of a road cutting. 



In addition, the laboratory examination of material from a vent 

 a few miles north-east of Woodend shows the presence in that 

 district of a rather interesting agglomerate. Some of the frag- 

 ments are quartz-bearing pieces of the Ordovician sediments, 

 others are fragments of an alkali igiieous rock with abundant 

 well-shaped, but minute sections of nepheline, indicating the 

 existence of nepheline phonolite in the Macedon district. This is 

 the first undoubted recognition of the occurrence of a felspathoid 

 bearing rock in that region. Earlier references to nosean and 

 to melilite have been shown to' be inaccurate or unsubstantiated. 

 During another students' Geological Survey camp at Greendale, 

 north of Bacchus Marsh, in January, 1915, a small basaltic outcrop 

 near the township proves to contain abundant minute crystals 

 of nepheline, and the rock appears to be a nepheline basalt. 



North-west from Greendale. two outstanding volcanic hills 

 consist of alkali rich types. 



Mt. Wilson, fi mile? west-north-west of Blackwood township, 

 ifc composed of lava flows of ncipheline scdalite phonolite, oi- since 

 the felspathoids are present in subordinate amount the rock may 

 better be desicribed as a trachy-phonolite. 



1084—19 



