358 PROCEEDINGS OF SECTION C. 
about 14 mile north of Heathcote. Several large ones may be 
seen in what was once the Mayfield vineyard, since destroyed 
owing to the presence of phylloxera. This spot is between 3 and 
4 miles from the nearest boundary of the Derrinal glacial area, 
being separated from the latter by the intrusive diabase, and 
associated rocks described in Mr. Howitt’s paper. 
COLERAINE AREA. 
The only reference I can find to any previous literature dealing 
with the glacial beds in the vicinity of Coleraine is a short para- 
graph in Progress Report (No. VIII) of the Department of Mines, 
Victoria, p. 59, by Mr. J. Ferguson, of the Department. Ina 
paper on this district, read at the Adelaide meeting of the A. A.A.S., 
1893, by Mr. J. Dennant, F'.G.8., only the rocks of igneous origin 
were considered. 
Before entering on a detailed description of the glacial beds, a 
word is necessary as to the general physical and geological features 
of the district. The country consists mainly of a plateau, at a 
level of about 700 feet above the sea, intersected by deep and 
wide valleys excavated by the Koroit, Koonong Wootong, and 
other creeks, the most westerly of which is McKinnon’s Creek. 
The Koroit Creek, on which Coleraine is situated, flows south until 
about 2 miles east from Coleraine, when it makes a sharp bend, and 
takes a course which is approximately west until it passes out of 
the glacial area. The other creeks, of which the Koonong 
Wootong Creek is the most important, flow south into the Koroit 
Creek. The general level of the beds of these creeks is about 300 
feet above the sea, and the valleys in which the creeks flow are 
very wide, with gently sloping sides for the most part. The 
plateau, therefore, north of Coleraine, to which the glacial beds are 
with one exception confined, may be regarded as divided into a 
series of roughly parallel tongues, pointing to the south, separated 
from each other by the creeks. The level of the plateau is reached 
about 3 miles north of Coleraine, where the uppermost beds are of 
recent Tertiary age. To the northand north-east of Coleraine the 
tongues of land terminate in a mass of igneous rock of a trachytic 
type. The greatest extension of the glacial beds lies between the 
Koroit Creek on the east, McKinnon’s Creek on the west, the 
plateau to the north, and the Koroit Creek and belt of trachyte 
on the south. 
On traversing the country between the creeks, striated and 
grooved stones may be found lying on the grassy surface every 
few yards ; but only in three places can sections of the underlying 
beds in the glacial area be found. About 3 miles along the upper 
Koonong Wootong Road from Coleraine there is a cutting in 
which a bed of till is exposed, covered to the north by a ferruginous 
conglomerate or grit of Tertiary age. The cutting is on both sides 
