On some Igneous rocks from the Heazlewood District

The Heazlewood District is situated directly south-west of the township of Waratah, in the county of Russell, and has of late years been made fairly accessible in consequence of its importance as an active centre of mining industry. The geology is in several respects unlike that of any other portion of the island, as far as known; though no systematic investigation of it has yet been undertaken. It lies south of the great coastal basaltic sheet, and north of a series of ancient metamorphic schists, with the interpolated gneisses and masses of crystalline limestone of the Pieman River area.
Geologically, its characteristic features may be said to commence at a locality situate on the main Waratah-Corinna road, and known as the 10-Mile, and to continue thence to the immediate neighbourhood of the 18-Mile Camp. It extends in a northerly direction a small distance beyond Mt. Cleveland, and is crudely bounded on the south by the Parsons' Hood Mountain, with an irregular interruption by the stanniferous granites which form the main feature of the Meredith Range. The characteristic which renders the area of special interest to the geological student, and to the petrologist in particular, is the occurrence of a series of local rocks, which include fine grained granitites and syenites with masses of serpentine, the latter being closely associated with gabbros and ultra-basic rocks. These last commonly appear as comparatively large intrusive dykes. Includes plate of Harzburgite, Olivine Norite, Pyroxenite and Lherzolite.