115 
PROCEEDINGS OF THE ROYAL SOCIETY OF QUEENSLAND. 
TABLE 1.—CHEMICAL ANALYSIS OF VOLCANIC Rocks. 
Rhyolite volt F Andesite, Basalt, 
| Rito | ha, Ants ntti nod in, 
Randa \Valley Creek,) Hight Mile te it sg iene ile 
| Portion 2161.| Portion 18v.| Creek. Teck. ange. 
: | 
Analyst. \G. R. Patten.|G. R. Patten. G, R. Patten.|G. R. Patten.|G. R. Patten. 
-| : a 
SiO, 7. W393 73°87 55-49 54-25 53°34 
Al,O, 16-85 12-92 18°63 19.46 18-73 
Fe,0, 0-60 nil. 1-89 3:16 W-72 
FeO 1-10 Bye 5-4] 4:27 6-65 
MgO 0-43 0-83 3°28 2-15 5:10 
CaO 0-63 2-83 6-09 5°81 8-75 
Na,O 3-61 Dea | 4-11 3°56 2-30 
K,O 1-88 1-07 0-11 0-62 0-61 
H,O+ 0.47 0-43 2-16 29s a 1-03 
H,O— 0-15 009 | 0-17 0-22 0-21 
co, nil. Ses | Lal’, 1:97 nil. 
ALN) 0-45 OS | 1-70 1.82 1-80 
POn | 0-07 OF0 Smeal 0-14 0.21 0-15 
MnO | 0-02 0-04 | 0-09 0-10 0-17 
: | | = eats 
Total 100-19 99.73 | 100-45 100-39 100-56 
Spec. Grav.| 2-628 2-652 | 2°747 2-753 2-847 
| 
NorMs. 
Quartz 43°74 47-04 14°40 19-56 9-00 
Orthoclase Bei tp 6-67 0-56 3°34 3°34 
Albite 30°39 QHe2 34:58 29-87 19-39 
Anorthite 2-5 | 1-95 21-96 15-85 38°92 
Corundum 8-06 5°61 3°67 7:14 one 
Diopside | ae a ae He 2.94 
Hypersthenie 1-89 5:80 13°88 9-14 19°32 
Magnetite 0:93 he 2-78 4-64 2-55 
Ilmenite | 0-76 0-61 3°19 3°50 3°50 
Apatite .. | 0-34 0-34 0°34 0°34 0°34 
Calcite aH: 4-00 2-70 4-40 BS 
Water 0-62 0-52 Dae 2-41 1-24 
‘Total 100:35 | 99-79 100-39 100-19 100-54. 
Classifi- ian Tis33e Iga IT-4.3.5. 11.4.3.5. | 11.4(5).4.4 
cation 
(IV.) COMPARISON WITH OTHER PERMO-CARBON- 
IFEROUS VOLCANICS OF AUSTRALIA. 
(a) General—The voleanie series under discussion 
cannot be closely correlated with any similar series in 
Australia, and indeed this is one of the reasons for its 
