G. D. OSBORNE. 



SODl-PQTASSlC WmiTE 

 POTASH-RHXOLlTE 

 VOLITE 



CONSTE.AKDTUff.DELCENIU 

 a,1Z KERATOPHVRE 



Fine tuff 



COARSE TUFF 

 VOLCANIC CONCLOMERATr ETC 



OECOMPOSED 8I0TITE.- 

 QUARTI-KERATOPHVRE 



Tuffs with pebbles 



ALLUVIUM CONCEALIiSe 

 hYPERSTheNE (iNDESlTlt 

 PITCHSTONE 



ALLUVIUM CONCEALING 

 BASAL STAGE 



HORNBUENDE-ANOESITE 



TUFFS WITH PEBBLES 

 HYPERSTHENE-ANDESITE 

 CDNGLDMERATE AND TuFF 

 SODl-POTASSiC RHVOLITE 

 CONGLOMERATE 



BIOTITE-a,TZ.-KERATOPHYR£ 

 conglomerate: 



BI0T1TE-^T2.-K,ERAT0PH-(RE 



ROCK JNTERhEOIATE 

 RHVOLlTr'ANO DACITE 



CO^CL0WERflTE I 

 PEBBLY TUFF' 



TOSCANITE AND DELLEMTE 



VMITE. OACITE 



CONGLOMERATE 



POTftSH-RHYOLITE 



FELSITE 

 CONGLOMERATE 



keratophyre 



conglomerate 

 potash-rhvolite; 

 conglomerate 



OKCITE 



TUFF AND CONGTE. 



GLACIAL STAGE 



