Nov. i, 1885.] The Australasian Scientific Magazine. 
123 
Holiday Rambles in the Australian Alps. 
By James Stirling, F.L.S., F.G.S., Etc. 
PART IV. 
This spur on the crest o! which we are now standing proceeds from the 
Buninyong range. I have drawn your attention to the shales and con- 
glomerates which appear to dip under the limestone, and to the fact that 
we have here a possible clue to the relations of the Mt. Tambo con- 
glomerates, sandstones, shales, etc., with the Bindi limestones, but we must 
satisfy ourselves — first, that these beds of shale and conglomerate do really 
underly the limestones; and secondly, that the former are the equivalents 
of the Mt. Tambo series. And in order to do this we must carefully ex- 
amine the stratigraphical relations and lithological character. Let us then 
compare the geological features of these rocks with that of a similar formation 
elsewhere, i.e., let us co-relate these Bindi limestones and their bounding 
rocks with the Buchan limestones some 20 miles distant. I have here a 
very complete geological description of the Buchan beds written by an ac- 
complished geologist* from which we may obtain some useful data to enable 
a comparison to be made between the rock masses forming the basin in 
which the Bindi and Buchan limestones respectively rest. 'While I am 
reading will you kindly break off a sample of theshale, and yon mass of con- 
glomerate, and compare them with the description of the rocks underlying 
the Buchan beds. “The Buchan limestones are therefore only part of a 
continuous series, the lower part of the group consists of coarsely aggre- 
gated felsitic breccias, the coarseness of materials decreasing, but with alter- 
nations of texture in ascending.” The deposits also become more dis- 
tinctly bedded in places, as at Butchers Creek, pass into, or alternate with 
subordinate conglomerates in which angular or rounded fragments of sedi- 
mentary rocks are of common occurrence. All the late, and in many of 
the earlier beds aqueous arrangement is clearly distinguishable. The coarse 
angular breccias at the base indicate, I think, a shore line. You remark 
that the angular breccias are absent in the conglomerate you have ex- 
amined which is evidently made up of waterworn pebbles and flattened 
boulders in a cement of sandstone, and that the shale is clearly a sedimen- 
tary rock. And you do not think the general lithological characters are in 
many respects identical with the rocks under the Buchan beds. Yes, I 
* A. W. Howitt, F.G.S., on “ Devonian rooks of North Gippsland.” Prog. rep. Geo. 
Sur. Viet., vol. V. p, 127. 
