TJie Geologij of Colmaidai 183 



yards. They present the usual characteristics of their chiss and 

 show little or very indistinct traces of stratitication. The}- 

 merge upwards into sandstones and for a short distance dip 

 in a north-easterly direction at a low angle. As we proceed 

 further the dip fluctuates a good deal and at a point about 

 a quarter-mile S. of Elam's farm it is apparently in a S.E. 

 direction. This brings into view a series of beds, the lowest 

 occuring in the district, which are exposed for about one and 

 half miles up the creek. They are at first obscurely stratitied : 

 they consist of a blue coloured clay, and are less hard than tlu' 

 glacial conglomerates. Going further uji the creek the stratitica 

 tion becomes more marked, and the beds become very rich in 

 included l)oulders which are, generally speaking, much larger and 

 more grooved here than elsewhere in the glacial series. Hero 

 occurs a small but well marked intercalated bed of boulders, 

 which are much scored and show considerable uniformity in size 

 and composition. A little beyond Elam's the beds have a slight: 

 dip to the N. Stratitied mudstones continue up to the junction 

 of the Back and Goodman's Creeks. At about quai'ter-mile below 

 this junction a section is exposed about 140 feet in height ; the 

 beds composing it are somewhat scantily supplied with included 

 boulders and stones. Here the mudstones pass upwards into the 

 unstratitied glacial conglomerates in which boulders are numerou-i 

 though small ; the conglomerates in turn pass upwards into 

 sandstones, similar to the Bald Hill sandstones. This wliole 

 series dips a little E. of iS. at an angle of from 10" to 20'. The 

 sandstones covei- a considerable part of this locality, a change of 

 dip bringing the sandstone over to the E. bank of the creek at 

 this point. North of the junction tlie Silurian rocks occur for thi- 

 most part, but occasional patches of glacial beds may be seen. 



The glacial beds are e.xposed along the Lerderderg River fo;- 

 about two miles above the point wliei-e the Goodman's Creek 

 joins it. About a quarter of a mile above this point mudstones 

 dipping to the S. and overlain hy sandstones are seen, while at 

 the big bend in the river a little further on sandstones and 

 mudstones again occur. T'.eyond this l)lue well-stratitied mud- 

 stones containing numerous .scored boulders are encountered : 

 they bear a strong resemblance to beds which occur on the 

 Goodman's Creek, and they dip to the S. at about 10". Mudstcmes 



