BY II. C. RICHARDS. 203 



Plate XIII. 



Fig. 1. — Khyolite, Glennie's Pulpit, Mount Alford, shoAving 

 corroded phenocrysts of quartz and sanidine. 

 X nicols. 8p. 101. 



Fig. 2.— Rhyolite, Glen Rock, Esk. Sp. 234. 



Fig. 3. — Volcanic Breccia, Lamiugton Glen, Christmas 

 Creek. Sp. 99. 



Fig. 4. — Augite-Andesite, portion 28 v, parish of Biarra, 

 near Ottaba Station, showing the resorption 

 borders around the augite phenocrysts. Sp. 224. 



Fig. 5. — Andesite, portion 18, parish of Witherin, Tam- 

 borine Plateau, showing the inclusions in the 

 plagioclase phenocrysts, also the clear borders 

 of the latter. .S';;. 123. 



Fig. 6, — Andesite, One Tree Hill, Coolangatta. Showing 

 one phenocryst of plagioclase with a zonal 

 arrangement of inclusions, and another thickly 

 studded with inclusions. Sp. 9. 



Plate XIV. 

 Fig. 1. — Andesitic-Basalt, upper flow, Point Danger, show- 

 ing portion of a large plagioclase phenocryst. 

 X nicols. Sp. 11. 



Fig. 2. — Andesitic-Basalt, Lamington Plateau, showing 

 phenocrysts of plagioclase and olivine, the latter 

 mineral being much altered into iddingsite. X 

 nicols. Sp. 85. 



Fig. 3. — Lower Basalt. Chinghee Creek, portion 69, parish 

 of Telemon. Sp. 94. 



Fig. 4. — Basalt, Quarries, Bundamba, showing patches of 

 glass thickly studded with rods of the iron- 

 ores. Sp. 237. 



