348 Ernest W. Skeats : Bockii near Heathcotc 



township. The vein crossing the photograph consists of a light 

 green micaceous mineral polarizing brightly. The pale background 

 of the rock is a low polarizing aggregate of a micaceous or scaly 

 mineral which is green in hand specimen. Grains of opaque 

 chromite occur and many granular brownish crystals of altered 

 ortlior'homljic pyroxene (?) 



4. Rock Section 634 x 11 diameters. 



Fossiliferous Ordovician shale 20' W. of " brecciated conglom- 

 erate " in road between allotments 3m and 3j, Knowsley East. 

 The rock is crowded with .sections of sponge-.spicules. Circular 

 chalcedonic areas may represent altered sections of Radiolaria. 



Platk XVII. 



Fig. 1. Section through Photograph Knob, Heathcote. 

 Fig. 2. Section at Red Hill, Heathcote. 



Pl.^tk XVIII. 

 Geological Sketch Map of the Heathcote District. 



