MINERALS OF QUEENSLAND. 249 
much pyrites below water level (J.); Marengo g.f.!! 
in reefs, country rock essentially a white granite in 
which the mica is sometimes supplemented and 
occasionally replaced by hornblende, frequent bosses of 
intrusive felspar-prophyry, and _ occasional small 
areas of gneiss, mica schist, shales and _ grey- 
wackes, gold in reefs associated with quartz, calcite, 
malachite, pyrites and chalcopyrites (J.); Cape 
River g. f. !!1, filiform, in threads and _hairs, 
which, under the microscope, resemble in a marked 
degree, the roots of fine grass, and in the matted mass 
small particles of opaque iron-stained quartz are observ- 
able. As much as 53 oz. at a time have been melted 
into a bar by us, the bar which weighed 520z. ldwt. 
6gr., assayed £3 16s. 10d. per oz. (Coane and Clarke) ; 
alloyed with a large proportion of silver, &c, and often 
takes a peculiar form, combining a thread-like structure 
with a semi-crystalline surface, which is technically 
known among Queensland diggers as ‘ spider-leg” gold 
(D.); in reef in metamorphic schist country, also in 
recent alluvium and older fragmentary drifts, supposed 
to be Pliocene (D),—[ Analysis by Mr. Richard Smith, 
of the School of Mines, London:—Gold 89-920, silver 
9-688, copper 0-128, lead 0-026, iron 0-070, total 99°832]; 
Paddy’s Gully, Cape River ! !, alluvial (D.), [Analysis 
by Mr. Richard Smith, School of Mines, London :— 
gold 92-800, silver 6:°774, copper 0:048, lead 0-048, 
bismuth traces, iron 0-014, total 99-684]; Charters 
Towers g. f. ! ! !, throughout the goldfield, generally 
associated with galena, sphalerite, calcite, and quartz and 
iron pyrites (C.) ; the principal mines in a granitic area 
inand around the town, others in a country rock of 
quartzites, greywackes, slates and shales, field also yield- 
ing asmall and annualy decreasing proportion of alluvial 
gold (J.); Curlew, about 12 miles south of Charters 
Towers ! ! !, associated with cerussite, quartz, pyromor- 
phite, chrysocolla, malachite and galena(C.); Ravenswood 
g. f. !, free gold in galena, in cerussite and in limonite 
(L.) ; Ravenswood ! ! !, in reefs associated with quartz, 
iron, copper and _ arsenical pyrites, sphalerite, 
galena, &c., country rock, grey syenitic granite, a fair 
proportion of alluvial gold also obtained (J.) ; 
Mulgrave g. f.!!!, in reefs in a country rock of grey- 
wacke, slate and quartzite (J.); Russell Terraces ! ! }, 
alluvial, in old high-level terraces, probably Tertiary (J.) ; 
Cloncurry g. f. !, in schorl, in malachite, in limonite, in 
sandstone, in malachite and cuprite, in carbonate of 
bismuth (L.), in reefs among highly-inclined slates, 
