130 Charles Fenner : 



Warrion Hills, in scoria, 1914. 

 Warrenheip, in scoria, 1914. 

 Flow above Pike's dam, at Ballan. 191-5. 

 Near new Moorabool dam, Ballarat, 1915. 

 Mount Elephant, in scoria, 1915. 



VII.— WoHd-wide occurrence. 



The occurrence of quartz in basalt and allied basic rocks is world- 

 wide, and a large amount of literature exists concerning the same 

 " Quartz basalt " as a rock type appears to be generally recog- 

 nised-, and in such cases as those of North America, described by 

 Diller, Iddings, and others, it seems impossible to doubt that " the 

 quartz is just as much a primary constituent of the rock as is the 

 olivine." Daly gives the total area covered by quartz basalts in 

 North America as eight square miles. The occurrence mentioned in 

 this paper can only be claimed, at most, as a " quartziferous basalt " 

 — analogous to some of the recorded occurrences of South Africa, 

 Scotland, etc. Daly, in " Igneous Rocks and Their Origin.*' records 

 quartz basalts " or their allies " from practically every corner of 

 the earth — from Antarctica to Greenland. 



VIII.— Literature. 



Books and articles that have been consulted include : — 



(a) " A late volcanic eruption in Northern California, and 



its peculiar lava." J. 8. Diller Bull. 7!). U.S. Geol. 

 Survey, 1891. 



(b) "The occurrence of primary quartz in certain basalts." 



J. P. Iddings, Bull. 66, U.S. Geol. Survey. 1890. 



(c) " Igneous Bocks and Their Origin," R. A. Daly. 1914. 



(d) A.J.S., Art. XX. J. P. Iddings. 1888. 



(e) "Tertiary Igneous Hocks of Skye." A. Ilarker. chap. 



XX.. etc., L904. 



(f) Intrusions of Kilsyth. Croydon district, Scotland. G. W. 



Tyrell. Geol. Mag.. 1909. 



(g) Q.J.G.S. J. \Y. Judd, pp. 175-186, May, 1889. 



(h) Lamprophyres of X. England. Geol. Mag., pp. 109-206. 



A. Barker, 1892. 

 <i) Porphyritic quartz in basic igneous rocks, p. 48."). A. 



Barker, 1892. 

 (k) Petrology for Students. A. Ilarker, 1897 edn.. pp. 138, 



190. 



