20 Skeats, Excursion to Moorooduc. [^"^Vun?^'' 



south-west, along the crest of the ridge, and examined the features 

 in a quarry excavated in highly altered shales and sandstones 

 adjoining the granitic mass of Mt. Eliza. The sections exposed 

 showed good examples of acid veins from the granodiorite cutting 

 across the sediments, and a number of interesting rock types 

 illustrating the contact metamorphism of arenaceous and argil- 

 laceous sediments. Quartzites, hornfels, spotted slates, and 

 andalusite slates were all represented. 



The summit of Mt. Eliza (500 feet) was then reached, and 

 rounded outlines of the granitic outcrops were noticed. Study of 

 the rock shows that it belongs to the group of the granodiorites 

 so commonly represented in Victoria. The principal minerals 

 are plagioclase, quartz, orthoclase, and biotite. From Mt. Eliza 

 the party travelled in a westerly direction, and after lunch reached 

 the shore at a point about three-quarters of a mile south of the 

 mouth of Grice's Creek, where olive-coloured and plant-bearing 

 shales of Jurassic age are exposed on the beach in abrupt and 

 probably faulted contact with the decomposed granodiorite of 

 the area. Vegetable fragments were seen in tlie shales, but no 

 recognizable fossils were found, as the condition of the tide was 

 unfavourable. 



Near here a typical aboriginal "kitchen-midden" was seen, 

 consisting of an assemblage of broken shells of the edible 

 molluscs now living in Hobson's Bay. This kitchen-midden, 

 like others to be seen along the bay, occurs on the top of tlie low 

 cliff, and marks the site of aboriginal feasts. 



Further northwards, along the sea-shore, Grice's Creek was 

 reached, and the well-known section in the Tertiary clays and 

 lenticular limestones at this locality was examined. A consider- 

 able number of the typical Balcombian fossils was obtained. 



The stream section was then examined, and it was noticed 

 that on ascending the stream -course the Tertiary clays were 

 succeeded by decomposed Older Basalt. Apparently the basalt 

 rests upon the clays, but the section was difficult to interpret, as 

 much of this coast-line has suffered from landslip, and one could 

 not be quite sure that the aj^parent relations of the rocks repre- 

 sented them in their true stratigraphical positions. Higher up 

 the stream the basalt was seen to be replaced by decomposed 

 granodiorite. At this point the organized geological observations 

 ceased, and the members of the party, at varying speeds, made 

 their way to and along the road leading to Frankston, where the 

 party took train to Melbourne. 



Further details of the geology of this interesting district, with 

 maps, will be found in'a report by Mr. A. E. Kitson, F.G.S., in 

 the " Progress Report of the Mining Department, Victoria," No. 

 12, March, 1900 ; and in a paper by myself, contributed to the 

 Royal Society of Victoria in 1907 (Proc. Roy. Soc. Vict., vol. 

 XX. (new series), part 2, page 102). — E. W. Skeats. 



