32 



Leucoxene may be detected in patches, and a little chlorite 

 occurs here and there throughout the sections. 



At the Heazlewood, extensive masses of serpentine occur of 

 comparatively limited width. These have a considerable 

 extension in a northern and southern direction. It is of 

 common occurrence for several miles north of the main 

 Waratah-Corinna road, and has been traced as far south 

 as the Parson's Hood mountain. With it numerous varieties 

 of olivine and pyroxene-bearing rocks are intimately as- 

 sociated, from the alteration of which the serpentine doubt- 

 less originates. In the immediate neighbourhood of the 

 Heazlewood S.M. Co.'s property, the rock now under con- 

 sideration — websterite — is extremely abundant, occurring in 

 protruding masses of somewhat large size, and apparently in 

 places passing into a more pronounced serpentinised form. 

 When met with in a fairly fresh condition, it is extremely 

 dark in colour, almost black, with an occasional green tinge. 

 The lustre is dull and obscure, except for the occasional large 

 patches of diallage, which have a glimmering surface. On 

 weathering, the outer crust is invariably very irregular, with 

 numerous sharp, jagged protuberances, the whole surface 

 then becoming of a dark brown colour. 



7. G-ranitite. 

 Sp. Gr. 2-68. 

 Granitite, or as it is sometimes called biotite-granite, gene- 

 rally carries some hornblende, but that mineral does not 

 appear to be present in this rock. In general macroscopical 

 appearance this is a granular and compact rock of somewhat 

 even texture, without any of the essential mineral constituent- 

 becoming porphyritically developed. In colour it is yellowishs 

 white, intermixed with dull green, the first mainly arising 

 from the felspars, and the latter from the abundant chlorite 

 it contains. On the exposed surface it is coated with a thin 

 crust of a rusty hue, which does not penetrate deeply into the 

 solid rock. It occurs in considerable quantity in intimate 

 geological association with the augite-syenite herewith de- 

 scribed, and with it forms the principal mass of the higher 

 elevations on the Bell's Reward Silver Mine and the immedi- 

 ate vicinity, apparently running parallel with the serpentine 

 rocks. It is one of the many varieties of rock that have been 

 generally termed " diorite " in this colony, and more rarely 

 "greenstone," its true penological nature having apparently 

 escaped detection. 



Min. Constit.: Orthoclase, plagioclase, hiotite, quartz, sphene, 

 magnetite, chlorite. 

 Microscopical Appearance : 

 Orthoclase in irregular forms, sometimes graphically inter- 



