Geology. | 289 
“seed < potash and soda are everywhere present in sedimentary 
“cee G goeipoeng feldspathic materials are seldom wanting, and 
hese in the presence of a mixture of quartz and earthy carbonates, 
and we : ft 
the Hien back again to silicate, the only limit to the process would be 
Breen: ying of the mutual affinities of the silica, and the -basic oxyds 
eal the Extinct Volcanoes of Victoria, Australia; by R. Broven 
Ess q. C.E., F.G S., (Proc. Geol. Soc., in L. E. and D. Phil. Mag, 
: and other evid in Southern Australia in which lavas, basalts, 
ae Pleat ences of recent igneous action are found, extends from the 
nN Goat (@ tributary of the Yarra), on the east, to Mount Gambier 
‘é Loddon) its most northern point is Macneil’s Creek (a tributary of 
“ie in 37° 8. lat., and its most southern point is Belfast, in 
2 at. Its extreme length is 250 miles, and its extreme breadth 
were enumerated an j h isti 
mark a cation oe ae a d described as the most distinctly 
about Satoh the source of the Merri Creek, on the Dividing Range, 
the Govern iles north ot Melbourne, and already described by Mr. Selwyn, 
sea-level <n Geologist. 2 Mount Atkin, about 1500 feet above the 
4 " - Mount Boninyong, adjacent to the Ballarat Gold-fields. 
€baramul or Mount Franklyn. 5. Mount Rouse 
Several 
Larn 
Craterif; : : fk 
orm ue around Lake Koraugamite, and the often conical hills 
e 
known as t 
Rises. 7. Tower Hill, between the towns of War- 
In the last-mentioned in- 
ing, and amongst this dry, but not 
rkmen are said to have found some living frogs. 
tetori of intrusive 
gs 
ee 
