Some Kyaxite-iseartng Rocks from the Eastern Goldfields, 
Western Australia. 
15 
In the g-eological map aeeoinpaiiying his report on the geology of Leonora, 
Jackson (o|>. cit.) shows a broken line of ridges running southward from 
Mt. Leonora, a})}>arently forming the southern continuation of the strike of 
the Mt. Leonora rock, for over two miles. Similar ridges are also shown 
running northwards from the eastern outskirts of L(*onora townshii) to 
beyond Mt. George. The centre of all this line of ridges is inapp(nl as com- 
posed of a more or less continuous bed of ‘d)anded hematite-bearing ([uartz.^^ 
G.N.U'.A. A'r//. So. 19G. Fhoto. C. F. V'. Jackson. 
Fig. 4. — Outto-ops of audahisite (juavtz seliist, or (pun-tzite, Mt. Leonora, showing 
))eddiug idjmes di|ij)ing at about 55® to the west. 
Outcrops of this rock on the eastern edge of the townsite are certainly 
those of (|uite typical bedded ferruginous t|uartzite or jaspilite, and conse- 
quently it would appear that in its liroad geological association with these 
jaspilite beds the Mt. Leonora rock shows a striking similarity to the Camel 
Humps occurrence, described above. 
in his bulletin dealing with the field geology of the Leouora-Duketon 
District, E. de C. C'larke (17), in an account of the Mt. Leonora rock quoted 
Farquharson’s determination of it as a ^‘finely foliated, ranch granulated 
andalusite-c|uaifz schist which he considers to b(‘ a metanior})hosed si'diment.'’ 
Chemical analy.ses of specimens collected by Jackson (5084) and by Clarke 
(1/2002) were compared witli two analyses of metainorphic rocks from 
Quinn^s, (Murchison Goldtield), and their general similarity noted. These 
analyses are quoted below. 
Petrography. 
A recent re-examination by the "writer, of a numlier of the old thin slices 
together with several new ones cut from dilferent specimens of the Mt. 
Leonora rock has disclosed the interesting fact that, in addition to andalnsite, 
some hand specimens also contained the higher grade nietamor])hic minerals, 
