200 
The basaltic cap continues uninterruptedly along the high 
ground from Kingscote to the Bluff, at the entrance to the Bay 
of Shoals, a distance of about two miles. It is evident that 
originally this basaltic sheet covered a much greater extent of 
country than it does at present, having been subjected to exten- 
sive denudation that has broken up the original igneous piateau 
into isolated areas, separated by miles of low land. It reappears 
at Rettie’s Bluff, five miles to the west of Kingscote, and forms. 
the table-topped summits of the Gap Hills, extending in a lineal 
direction, with some interruptions, from Kingscote to Smith’s Bay, 
a distance of twelve miles. 
The underlying sandstone, already referred to, can be traced. 
round the Kingscote Point to the Bluff, and reappears under the 
basalt in the Gap Hills, and extends at least as far as Smith’s. 
Bay. At the latter place, near the residence of Mr. George © 
Turner, the sandstone was eroded, before the volcanic overflow, 
into a considerable mound, around and over which the basalt has 
flowed. The section can be seen in a deep gully that has been. 
cut through the igneous cap, and exposed the underlying beds. 
The geological age to which this igneous activity must be re- 
ferred is at present uncertain, but probably it took place in late 
Tertiary, or even Post Tertiary times, and might be synchronous. 
with the great volcanic phenomena that was a marked feature of 
the Mount Gambier and Southern Victorian areas about that 
period. 
GLACIAL. 
Kingscote.—In the sea cliffs at Kingscote the white sandstone 
underlying the basalt is itself underlain by a stiff, blue, and 
mottled clay at sea level, which continues in a southerly direc- 
tion to the Queenscliffe Jetty, and follows the coast to the north- 
ward along the southern shores of the Bay of Shoals. Its presence 
on the beach makes the ground sticky and unpleasant to walk 
upon. The line of junction between this clay and the Eocene 
beds at Beare’s Point is not very distinct, but appearances seem 
to indicate that it occupies a position inferior to the Tertiary- 
limestones. 
Resting on this clay along the beach a few erratics were 
noticed, consisting chiefly of quartzites and comparatively large 
boulders of a creamy white quartz. There were also a few large 
and round nodules of flint present, the origin of which is doubt-- 
ful, but they have probably been brought there by human 
agency. 
As to the age of this clay, the evidences are by no means 
clear, but from what I saw subsequently in my journey, I am. 
inclined to think that this beach clay may be the boulder clay of 
the district. The comparative absence of boulders from this. 
