oe ay 
PROCEEDINGS OF SECTION C. 417 
Many observations which I have made in the Omeo district 
support generally these views. 
In conclusion, I may say that the examination of the samples 
of rock from the margin of the metamorphic rocks at Dargo and 
at Marengo lead me to conclude that the limit of the metamor- 
phosed sediments is reached in the former locality when the schists 
become filled with foliations of biotite, and show traces of 
felspars ; and at Marengo where the quartzose pressure-gneisses 
commence. 
2.—CHALK AND FLINTS FROM THE SOLOMON 
ISLANDS. 
By A. Liversiper, M.A., F.R.S., Professor of Chemistry in the 
University of Sydney. 
The following notes are upon some specimens collected by Mr. 
Charles M. Woodford in the Solomon Islands, and sent by him 
to me for examination and description. 
The specimens consisted of the following :— 
1. Water from a hot spring, Savo Island. (See separate note 
for description. ) | 
2. Rock from ‘“‘ Stoneheap,” in the crater of Savo Island.—This 
is a greyish coloured crystalline trachytic rock, containing small 
but fairly well formed felspar crystals. 
3. Rock from “Stoneheap,” in the crater of Savo Island.—This 
is apparently a solfatara deposit, white and friable, and closely 
resembling the deposit from New Zealand and other solfataras. 
4. Rolled Pebbles, from Belisima River, Guadalciva Island.— 
These are evidently fragments of one of the older crystalline 
rocks, and resemble gabbro in appearance. They are of import- 
ance, since they indicate the presence of the older rocks in these 
islands, and if time permits, a fuller examination will be made of 
them. 
5. A hard compact limestone with a minutely crystalline 
structure, from Isabel Island. 
6. Two specimens from Florida or Gela Island.—These some- 
what resemble chalk in appearance, but the amount of carbonate 
of lime present is not great; they are soft, granular, and grey in 
colour, with a minutely crystalline structure. 
After being acted upon by strong hydrochloric acid, the larger 
fragments retained their original form, and the residue was 
found to consist of sharp quartz particles and rock debris, hence 
this rock is probably largely made up of volcanic ash and other 
materials, cemented together by calcium carbonate. 
Analyses of somewhat similar specimens from Vati and Malli- 
colo, New Hebrides, are given in the Jour. Roy. Soc. of N.S.W. 
¥a 
