GEOLOGY OF THE COOMA DISTRICT, N.S.W. 173 
I. Introductory. 
Comparatively little has been written, and no detailed 
work has hitherto been done, so far as I am aware, in con- 
nection with the geology of the extremely interesting 
region round Cooma. 
Rev. W. B. Clarke, in his ‘‘Southern Goldfields”? (Chap. 
vil, and elsewhere) makes reference to the schists and 
gneisses, the olivine basalt, the chiastolite slates of 
Geygedzerick Hill, and the Berridale granite. 
Professor David’ makes passing mention of the meta- 
morphic rocks, pointing out their lithological similarity to 
those of Mitta Mitta in Victoria, and to the Pre-Cambrian 
series along the eastern slopes of the Mount Lofty and 
Flinders Ranges in South Australia. He suggests that on 
these grounds the Cooma metamorphic series may be pro- 
visionally referred to the Pre-Cambrian. 
The physiography of the region has been dealt with in 
papers by Sitissmilch? and Griffith Taylor.* Other refer- 
ences will be given in the text. 
The present paper is the outcome of a visit paid to Cooma 
in February 1912, at the suggestion of Professor Woolnough, 
for the primary purpose of examining the pegmatite veins 
occurring in the gneiss. My attention was attracted by 
the extent and variety of the metamorphic rocks in the 
neighbourhood, and a few excursions into the surrounding 
country suggested in addition some stratigraphical pro- 
blems of interest. 
The town of Cooma is on a branch of the Great Southern 
Railway Line, 266 miles from Sydney, and 130 miles south 
1 Proc. Linn. Soc. N.S.W., Vol. xxxm11, 1908, p. 658. 
2 Notes on the Physiography of the Southern Tableland of N.S.W. 
This Journal, Vol. xi111, 1909, p. 381. 
* The Physiography of the Proposed Federal Territory at Canberra. 
Commonwealth Bureau of Meteorology, Bulletin No. 6, Dec. 1910. 
