48 
MINERAL CENSUS OF AUSTRALASIA. 
Morgan ! ! !,Finely disseminated throughout a deposit 
varying from red and brown hematite to a frothy, 
spongy, cellular silicious sinter, risimg into a mountain 
mass through a country rock of quartzites, hardened 
sandstones. greywackes and shales of Carbonifero- 
Permian age. I believe the deposit to be due to a 
geyser, but different explanations have been offered by 
Messrs. Macdonald, Cameron, Ranft and _ others. 
The gold is extracted by chlorination. The gold is of 
remarkable purity, assaying, according to Dr. Leibins, 
99°7 per cent., worth £4 4s. 8d. per ounce (J.); Norton 
g. ft. !!1!, reefs in an erupted boss of grey granite passing 
into syenite and porphyry, and intersected by dykes of 
diorite, dolerite and porphyry, reefs containing, besides 
gold, pyrites, arsenical pyrites, sphalerite, galena, 
stibnite, quartz and calcite, gold is extracted by 
chlorination (R.); Cania g. f. !!!, in reefs of quartz and 
calcite, and in alluvium, country rock sandstone, slate 
and limestone, probably Carbonifero-Permian (R.) ; 
Raglan g. f. !!!, reefs and alluvial, country rock slates, 
hardened sandstones or quartzites with occasional 
conglomerates and limestones, probably of the age of the 
Gympie beds (Carbonifero-Permian), (R.); Calliope 
g. f. !!!, reefs and alluvial, country rock chiefly altered 
slates with limestone and marble, intersected by dykes 
and patches of serpentine, diorite and porphyry (R.) ; 
Mount Britten g.f.!!1!, reefs, partly in diorite and 
partly in grey and black shales and sandstone of the 
“Gympie” series (Carbonifero-Permian), alluvial gold 
in large nuggets, with hardly any fine gold (J.); 
Yatton g.f.!!!, in reefs in diorite country, intersected 
by dykes of silicated felstone, the gangue-stuff (gene- 
rally composed of fragments of diorite) is veined with 
calcite and decomposed concretionary carbonate of lime, 
while occasional aggregations of siderite and decomposed 
orthoclase are met with, some of the stone, composed of 
mixed quartz and reddish ferruginous carbonate of 
lime shows gold very freely, the gold is flaky, like gold- 
leaf (J.); Kroombit g.f.!!!, alluvial gold in Recent 
and Post Tertiary (?) drifts (R.) ; Peak Downs g. f.!!}, 
reefs in crumpled and fissured metamorphic schists, 
slates, &c., of supposed Lower Silurian age (D.), alluvial 
gold from recent drifts, also from deep leads covered by 
basalt, and supposed by Daintree to be Miocene, alluvial 
gold also in a drift of Carbonifero-Permian age (R.) ; 
Normanby g. f., near Bowen !!!, reefs and alluvial, 
country rock, a porphyry consisting of quartz, black 
mica (sparsely) and schorl passing into greywacke, 
