824 
PROCEEDINGS OF SECTION C. 
The Silurian are the lowest rocks in the district, and form the 
usual rough wooded hills. The glacial beds form rounded hills of 
considerable value from an agricultural point of view. This rounded 
appearance would seem to be a characteristic one, precisely the same 
features marking the glacial beds at Derrinal. The Tertiaries (?) 
developed consist of — 
(1.) Magnesian limestone, probably lacustrine. 
(2.) Ferruginous conglomerates, pipeclays, and gravels. 
Beyond noting the fact that these overlie the glacial beds uncon- 
formably, we do not propose to deal further with them at present. 
The country lying between Goodman’s and Pyrete Creeks is occupied 
to a great extent by a long narrow strip of basalt, which has flowed 
from Mount Builengarook lying to the north. It overlies the above- 
mentioned tertiary beds. 
The glacial beds are best studied along Pyrete, Goodman’s, and 
the Back Creeks, and the Lerderderg River. From the sections there 
exposed, we find that the beds composing the glacial series consist of 
three well-marked classes of rock : — 
(1.) Stratified mudstones. 
(2.) Glacial conglomerates (for the want of a better term). 
(3.) Stratified sandstones and freestones. 
(7.) Stratified Mudstones. 
These, found along the above-mentioned streams, consist of a hard 
tenacious clay, varying in colour, pink, purple, blue, and yellow being 
the prevailing tints. They are regularly stratified, and occasionally 
finely laminated. Their glacial character is at once attested by the 
number of scored and scratched stones and boulders, varying from 
mere pebbles to hugh rock-masses weighing tons, contained in them. 
As regards arrangement, the greater bulk of the stones and boulders 
are scattered irregularly through the matrix, but in places regular 
beds or bands of these scored stones can be seen, as if they had all 
been laid down on a level floor — e.q., sections near Elam’s. In these 
bands water worn pebbles are usually abundant. Here and there 
throughout the mudstones, irregular " nests” and patches of waterworn 
conglomerate and coarse angular grit occur. 
These stratified mudstones are the lowest beds of the series 
exposed in this district. They are well shown on Goodman’s Creek, 
about li miles from the mouth, opposite R. Elam’s farm. Here they 
cousist of stratified blue clays, and the boulders contained in this 
matrix are numerous and large, and generally exceedingly well scored. 
One granite boulder lying in th,e bed of the creek, is well scored and 
flattened, and measures 8 ft. 3 in. X 4 ft. 5 in. X 1 ft. 10 in,, and 
Mr. Elam told us that he had removed fully half of it, so that 
originally it was about 17 feet long. Another boulder of granite here 
is about 10 feet in diameter ; another, of hard sandstone, measures 
6 ft. 6 in. X 6 ft. X 3 ft. 6 in.; while one of quartzite is 4 ft. Gin. X 
4 ft. x 3 ft. 6 in. Similar blue clays appear also on the Lerderderg. 
(2.) Conglomerates. 
The next type of rock that we distinguish is a conglomerate, 
usually of a purple colour, though generally stained with yellow and red. 
This class of rock does not show stratification nearly so well as the first 
class and very often appears to be quite unstratified. It likewise 
