Oct. r, 1885.] The Australasian Scientific Magazine. 95 
We are now 2300 feet above sea level as determined by the aneroid; and 
what are these coarse reddish or purplish looking rock masses in the creek 
bed, and protruding on the hillsides underneath the limestone beds? Ah, 
you have made another discovery this time what geologists would call a 
stratigraphical and lithological one, i.e., here are two sets of strata made 
up of different materials. Those purplish looking rocks are conglomerates 
and sandstones. See, they are composed of rounded fragments of other 
rocks rounded by the action of water and cemented together. And there 
are bands of coarse gritty sandstone. Measured with the clinometer the 
dip of these massive conglomerate beds is 46° to S.W., and are certainly 
stratigraphically inferior to the limestone beds. Let us follow the line of 
contact round the margin of these bluffy outcrops and see if there are no 
other kinds of rocks associated with the conglomerates and sandstones; 
and by an examination of the lowest beds of yellowish and earthy limestone 
ascertain, if possible, the presence of fossils, which would indicate the age 
of the lower bands. Ah ! here is another fossil, a cystiphyllium, which 
Professor M‘Coy will inform us is characteristic of Upper Silurian and 
Devonian formations, and of which we are the first discoverers in Victoria. 
And here is another kind of rock — a silk micaceous shale, which is seen to 
dip under the limestones, and overlie the conglomerates. Now these shales 
and conglomerates are identical in lithological character with the Mount 
Tambo beds, and we have here a geological problem to unravel. Other more 
able geologists have differed as to the age of these Mount Tambo beds, one 
asserting that they were older than the Bindi limestones,* the other that 
they were younger, and consequently Upper Devonian.! Now we may be 
able to throw some light on the question, and help to settle the dispute ; 
but in order to do so we must carefully examine all the bounding rocks, 
and take correct observations and measurements, for in a district like this, 
which has been subject to such powerful plutonic forces and displacements 
of the crust, great care is needed to determine the sequence of the 
formations. 
* Selwyn, A. R. C. — Notes on the Physical Geography, Geology, and Minerology of 
Victoria. Intercolonial Exhibition, 1866, p. 16. 
t Howitt, A. W., on the Devonian rocks of North Gippsland, vol. 1, p. 231. 
( To be continued.) 
