46 
section, but the amount cannot be relied upon as that of the beds generally, 
owing to the current-bedded nature of the deposit. The leaf-bearing clays 
contain considerable quantities of fine, platy sand and white muscovite, the 
two minerals resembling each other so much that it is difficult to distin¬ 
guish between them without the aid of a pocket lens. The beds have a 
distinct resemblance to certain ones in Grice’s Creek, Mornington, recently 
described* by me. 
The leaves, principally impressions, appear to be similar to those at 
Berwick and elsewhere, and they have been examined by Mr. Hy. Deane, 
M.A., F.L.S., of Sydney.f Among the creek gravels, between the 
leaf-bed and the lignite, a few pebbles of indurated dark siliceous slates, 
hard siliceous sandstones, and the characteristic quartz of the Jurassic 
pebbles occur. They resemble those commonly found in the lenticular 
patches of conglomerates so frequent in the Jurassic series, and have 
probably been here secondarily derived from the leaf-bearing series, and not 
directly from the Jurassic beds. 
In following the creek a little further up, bluish-grey clays, covered with 
rusty specks and drab splashes, come into evidence, and a few yards still 
further up a bed of brown clay splashed with drab and grey brownish-yellow 
patches. These clays may also be seen in the bed and banks of the little 
tributary from the north-east joining Middle Creek near the leaf-bed. 
They appear to be volcanic clays, and either thoroughly decomposed basalt 
or volcanic ash. Overlying them is dense, hard, dark basalt containing 
visible olivine, such as occurs up the steep slope in allotment 78 and in the 
south-eastern corner of the allotment joining it on the west. It also apparently 
runs down the eastern side of Middle Creek for some distance, forming a raised 
flat 5 to 7 chains wide. These clays appear here and there in the bed of the 
stream for a good many chains above its junction with Middle Creek. 
Mr. Murray states J that hard, undeeomposed, nearly black basalt 
is met with in Middle Creek, where it forms a layer in decomposed rock. 
This mode of occurrence was not observed by me, and is probably at present 
obscured by the fluviatile deposits, as is also the siliceous conglomerate 
referred to by him. 
The bed of the main creek from the clays mentioned above to near the 
northern boundary of allotment 76 contains little else besides pebbles of basalt. 
In the stream, about 30 yards below the northern boundary of allotment 76, 
are great masses of basalt boulders; and running parallel with this boundary, 
and about 3 chains south of it, basalt occurs running up the spur on the 
west. It is contiguous to massive beds of Jurassic sandstones, but, owing to 
numerous small landslips which have come away from the spur to the 
south, the line of contact is completely hidden. Along this contact there 
is a distinct hollow visible, in which a gully is in process of formation. 
The spur of basalt opposite, on the north-eastern side of the creek, 
is bounded both on the west and on the east by gullies which have been 
eroded along the lines of contact. That on the west divides the basalt 
sharply from Jurassic sediments, while that on the east separates it from 
the Cainozoic deposits. 
In tracing the basalt up the hill to the south of Middle Creek, it is 
found to continue to the top of the ridge in allotment 76, but as the ridge is 
* Kitson, Report on the Coast Line and Adjacent Country between Frankston, Mornington, 
and Dromana. Monthly Prog. Rept. Geol. Surv. Viet., No. 12, March, 1900. 
f Deane, Preliminary Report on the Fossil Flora of Pittield, Mornington, SentineL 
Rock (Otway Coast), Berwick and Wonwron. Records Geol. Surv. Viet., No. 1, Part I., 
1902. 
Op. cit ., p. 151. 
