GEOLOGICAL RECONNAISSANCE OF THE STIRLING RANGES. 79 



A GEOLOGICAL RECONNAISSANCE of the STIRLING 

 RANGES OF WESTERN AUSTRALIA. 



By W. G. WOOLNOUGH, D.Sc, f.g.s. 



Lately Professor of Geology, University of Western Australia. 



With Plate VI. 



[Bead before the Royal Society of N. S. Wales, August 4, 1920. 



TABLE OF CONTENTS. 



1. Introduction. 



2. Main Geographical Features of the Area. 



3. Description of the Ranges. 



4. Work of Previous Observers. 



5. Geology of the Stirling Ranges (Lithology). 



6. Summary of Lithological Characters. 



7. Structural Features. 



8. Summary of Structural Features. 



9. Age of the Stirling Range Series. 



10. Physiography. 



11. Earth Movement. 



12. Summary of Conclusions. 



Introduction. 

 In spite of their comparative accessibility and their very 

 striking appearance the Stirling Ranges have not received 

 very much attention from geologists. No traces of economic 

 deposits have been encountered. The soil is of the poorest 

 description, water supply is almost non-existent and prickly 

 scrub is extraordinarily dense. Hence there is no settle- 

 ment in the Ranges, and there is nothing to warrant official 

 geological examination. 



My thanks are due to the late H. P. Woodward, Esq., 

 Acting Government Geologist of Western Australia in the 

 early part of 1914, for allowing me the use of a certain 



