270 T. S. Hart: 



Wheeler's Hill aie the Police Paddock Hills, and the Dandeiiong 

 Creek contracts its valley to pass between these and Wheeler's Hill, 

 as well as changing to a south-easterly direction. The simplicity 

 of su(;h a rectangular {)lan is broken by the way in which the 

 Gardiner's Ci-eek catchment is enlarged at the expense of its 

 neighbours, 



dnrd in er's ( ' ri'fk . 



Nortli-west of the Malvern Cauiberwell higlilaiid, the, fall is 

 direct to the Yarra. The valley from near Malvern railway sta- 

 tion has a very direct north-west couise. The outlet of Gardiner's 

 Creek has also a nortli-west direction, and a valley no doubt con- 

 tinues under the basalt to join the buiicd valley of the Yarra. 

 The fall would bo steeper than is now seen in (Gardiner's Creek. 

 From the junction of (lardiner's Creek and Main Creek the fall is 

 from 85 to 25 above sea level in three miles. A mile and a-half 

 lower, (iardiner's Creek joins the Yarra at "J feet above sea level; 

 the probable junction of the buried valleys is a mile or a mile and 

 a half furthei' on, and about GO feet below sea level. Even allow- 

 ing the l)uried valley to extend some distance up (lardiner's Creek, 

 the fall will still be greater than the 20 feet to the mile higher up 

 the valley. 



The natural continuation of the (Tardinei's Creek valley is by 

 Scotchman's Creek tlirough Oakleigh ; a little valley can be followed 

 south-east to Netting Hill. But by far the greater part of the area 

 drained by Gardiner's Creek and Scotchman's Creek is to the 

 north of the main line of Gardiner's Creek. The contributions 

 from the south are insigniiicant in amount, and the most important 

 of these, the little rr«'ek at Murrumbeena. will be .shown later to 

 bo new. 



The mouth of Gardiner's Creek must lie a ipiite early feature. 

 Probably the whole system ilevelop«>d soon rn()ugh to secure the 

 waters of the area about Blackburn, which might have gone to 

 Koonung Cieek, and to capture Black Kbit (Glen Waverley) from 

 (lie eastern vall(\vs. Throughout the Gardiner's Creek area the 

 streams have cut down to tlu; bedi-ock. .\ much largei- proportion 

 of the rainfall must In; immediately discharged than by a system in 

 the absor]>tive tertiaiv jocks. The excavating jn.wer of the streams 

 is tlmrciln- increased, aiul the higher levels allow deeper dissection 

 than in the country to the south. No undiained ai'eas of the 

 kinil common fui-ther south occur. Detail of the course of the 

 creeks is inHuenced by bedrock structures, which no doubt con- 

 )ril)u(e to the numei'ous small irregulai"ities. 



