. . methods of manufacture, are identical with those adopted by 
. the latest 3 of the race. 
84 
northward of the highest position of the Patawalonga Creek. 
From Capt. White’s section it is seen that at present there 1s 
three feet of blue-clay and alluvium at the site covering the 
estuarine deposits. It is probable that the silt laid down by 
th d waters of the Torrens is responsible for damming 
back the tidal waters of the Patawalonga to the extent 
mentioned above. 
e position in which the aboriginal remains were found, 
viz., 10 feet from the surface, places them either at or a little 
below low-water mark, while immediately above them is à 
fluviatile bed, 3 feet or more in thickness, capped by a fresh- 
water lagoon deposit. Following these river and swamp 
resulted in the laying down of 3 feet of estuarine sediments. 
At the time of the human occupation of the site, neither 
the river nor the sea had covered the locality, which was 
occupied by sand drifts, and it was on these sand hills that 
the aboriginals were camped. As the ground was excavated by 
Mr. White, sen., in these blown sands to a depth of 10 feet 
below present low-water mark, there seems very clear evidence 
of a sinking of the land to the extent of several feet, at least, 
since the aboriginal camp was occupied. ES 
vidences of alternations of level on the coast are supplied 
antiquity than any previously noted. The suggestive points 
are:—/(a) The sand hills in which the aboriginals ormed 
important changes in the physical condition of the neighbour 
hood, the sand hills gave place to a river course, the sediments 
of which have since developed stalactitic concretions; after 
Which, the river stage passed into that of a swamp; big 
an incursion from the sea; and, in more recent times, 
of implements an 
ad 
me latest representatives of th 
