10 
Keith K. Miles 
for its (levelopiiiout, ap])ropriate conditions of moderately hi^h t(miperature 
in conjunction witli essential shearing- stinsss. It appears to liave only a 
temporary status or field of stability in regional inetanioi-phisni, and together 
with its ])olymorphs, andalnsite and sillinianit(‘, has been for a long time 
i-egarded as a *1<ey” mineral, indicative ot‘ a certain distinct grade or /one of 
metamot phi'^m. (4 p'iOS et se:).), {'>), (-). 
Kyanib* has been recorded IVom comparatively few localities in Western 
Australia, these being mostly confined to tlu' Chiltering Valley^ (5), (()), (^)t 
and (11), and the Clnttering-Jiini>erding-Clackline-Y()ilv belt of metamorphic 
rocks generally (8). Specimens ol kyanite haV(* been obtaine<l Irom other 
scattered localities i.(’., from Hichenda Hiver, W^est Kimbei’ley, (wlnu'c* it is 
associated with emery) ; Milly Milly Station, Mur<*hison Hiver (b) ; Smith- 
field and the Doniully Hiver, man* Hriilgetowu in the South-West Division, 
wlanv it occurs in pat('hes of waterworn Ixmlders (1'*:^), (lb), and (13); 
Mt. Han-en, South- W'est Division; but little if anything is known of the field 
relations of many of these oc('urrenc(‘s. Hrom the (joldtields, one occurrmice 
of a mineral rather doubtfully referred to kyanite, lias previously [)ee.n re- 
corded. (14). This is from the vicinity of Mt. Kenneth in the Yalgoo (rold- 
field, and this rock will he (h'scribed in some detail lielow. Tt is proposed to 
discuss se])arately tlie occurrences and petrographica! details of the several 
kyanite bearing rocks which have been noted. 
Fhuh). I\. R. Milox, 
Fig. -Hills of thi' nortlnn*ii ('omd Hmnps, looking east. Soil and talus in the 
foregrotuid. 
TIIK CAMEL HUMPS, MT. MAHGAHET GOLDFIELD. 
Field occurrence. 
The Camel Humps is the name gi^■en to two prominent ridges standing 
uj) in marked relief above rather Ioav, Hat or gently undulating country lying 
some 2 V 2 miles west of the main Lavertoii-Cox’s Find road, at a point about 
3d mih‘S north of Lavevfon. These two ridges lie a little over half a mile 
