38 AN ARTEFACT, PROBABLY OF PLEISTOCENE AGE, FROM KEILOR, VIC. 
that the river bed is 25 ft. 6 in. and the surface of the terrace 
44 ft. above low water mark at Williamstown. The Maribyrnong 
Park Terrace is somewhat younger than the Keilor Terrace in 
which fossil human skeletal remains were found (Mahony, 1943 a ; 
Wunderly, 1943; and Adam, 1943). 
The implement (Plate V) consists of a waterworn pebble of 
spotted hornfels with a curved, smooth cutting edge at its thinner 
end made by knocking off flakes from one side, the other side of 
the cutting edge being formed by the waterworn surface of the 
pebble. Weathering has equally affected both the whole water- 
worn surface and surfaces from which flakes have been removed, 
and it has partly obscured the sharp outlines of the latter; this 
suggests antiquity. As shown in the illustration, the pebble is 
flattened on one side and rounded on the other; about half way 
along the rounded side is a roughened, pitted area, measuring an 
inch by three-quarters of an inch, which may have been caused by 
percussion, such as hammering with a hard stone. Apart from 
flaking, the pebble retains its original shape. 
Hornfels in situ does not outcrop near Salt Creek, but it 
does five miles northward in the Maribyrnong River (Deep 
Creek) valley at the contact of Palaeozoic strata with intrusive 
granodiorite (James, 1920). 
A cast of the specimen is in the National Museum of Victoria. 
References 
Adam, ¥m., 1943. The Keilor Fossil Skull: Palate and Upper Dental Arch. 
Mem. Nat. Mus., Melbourne, 13, pp. 71-77, 4 figs., 2 pi. 
James, A. V. G., 1920. The Physiography and Geology of the Bulla-Sydenham 
Area. Pr. R. Soc. Viet., 32 (n.s.), pt. 2, pp. 321-49, 2 figs., 3 pi. 
Mahony, D. J., 1943 a. The Problem of Antiquity of Man in Australia. Mem. 
Nat. Mus., Melbourne, 13, pp. 7-56, 7 figs., 3 pi. 
1943 b. The Keilor Fossil Skull : Geological Evidence of Antiquity, Ibid., 
pp. 79-81. 
Wunderly, J., 1943. The Keilor Fossil Skull : Anatomical Description. Ibid., 
pp. 57-69, 1 fig., 6 pi. 
