Account of Glacial Deposits of Bacckus Marsh. 55 



lying rock. However in places, as seen in section, the latter 

 presented a roundel appearance that was very suggestive of 

 ice action. 



At the intake of the Bacchus Marsh water supply on the 

 VVerribee, about ;» mile below the Gorge, where the valley is 

 very broad, a splendid section of a till-like deposit is exposed ; 

 there being over 70 feet. The matrix is a yellowish-white 

 clay, very tough and hard, and stones and boulders of the 

 usual kind are scattered through it in a pell-mell fashion, 

 with no trace of arrangement. There is no stratification, 

 but irregular bands occur here and there, sometimes 

 lenticular in form. These bands are in some cases of a line 

 sandy material ; others consist of minute angular fragments 

 of much the same nature as the rest of the deposit, but 

 coarser. These bands are only about eighteen inches or two 

 feet in thickness, and seem to have been formed by the 

 intermittent action of running water. Similar bands and 

 lenticular patches of sand and other material occur 

 fre([uently in the till of the Northern Hemisphere, having 

 been formed by the action of sub-glacial streams. We have 

 not yet been able to determine definitely the relations of 

 this deposit, but froan its nature and position, as well as its 

 great thickness, we incline to the opinion that it belongs to 

 the upper glacial deposit. It occurs again about half a mile 

 fuither down the river, where good sections of it are exposed. 

 It here does not contain nearly so many stones, wdiile those 

 that do occur a'e generally small, otherwise it is similar to 

 that last described. ' We have not found the deposit between 

 this point and Bacchus Maish along the Werribee. 



About four miles up the Korkupeirimul from the bridge 

 on the Ballarat Road, a glacial conglomerate is again met 

 with containing numerous typical glaciated stones. The 

 matrix is exceedingly hard and devoid of stratification. In 

 places, when looked at from one point of view, an appeai-ance 

 of a somewhat irregular stratification can be seen. However, 

 a more careful examination reveals the fact that what ai'e 

 apparently lines of stratification, are in reality curved 

 divnsion-planes, which are probably due to shearing stresses. 

 At one place in this section a departure from the usual 

 irregular disposition of the stones may be observed. The 

 stones ai-e arranged in a sloping fashion, along an irclined 

 plane. This arrangement is sometimes met with in the till 

 of the Northern Hemisphere. At this place also a bouldei-, 

 about eighteen inches long and somewhat pear-shaped, can 



