Mines and Mineral Statistics. 
203 
for ages is apparent, as in one part of the coast north of Wollon 
gong there is an acciumilation of water-worn pumice, some dis- 
tance from the shore and beyond the reach of the present waves. 
It is supposed to come in during easterly gales, from the volcanic 
islands to the north-east. In 1811 tliis fact, and all the evidence 
then collected in relation to such drift and “atmospheric deposits 
of dust and ashes,” were published in a paper I forwarded to the 
Tasmanian Journal^ of whicdi D’Archiac (Frog, de la Geol.') was 
pleased to say it contained all tliat was laiown on the suliject. 
Subsequently received facts have only confirmed what was then 
stated. 
Along the coast of New South Wales are found ranges of 
Dunes, with a variety of shells, some of them rare, others common, 
as on Port Hacking and Cronulla Beach; along the shores of 
Botany Bay ; on the great ilat between the Hunter and Port 
Stephens, and along the Macleay Eiver, which now passes for 
many miles through the shelly accumulations ; and about Moreton 
Bay and in more northern coast openings, shells and marine 
refuse form deep deposits, from whicli, as inlllawarra and Broken 
Bay, a considerable profit is obtained by dredgers and shell- 
collectors, for the production of lime. 
Baised beaches also occur at various heights on rocky projec- 
tions of the coast, indicating elevation of the laud, of which there 
is distinct evidence in the recent period, not only in Moreton 
Bav.bnt near ISydney and thence to Bass’s Strait; also on both sides 
of that Strait, and as far as Adelaide and King George’s Sound. 
Mr. Selwyn gives data for assuming the elevation of the land to 
have reached occasionally 4,000 feet in Victoria, but lie has no 
evidence of Tertiary marine fossils above GOO feet. Unfor- 
tunately, on the eastern coast, having no marine Tertiaries, we 
have to found our deductions, as respects New 8outh Wales, on 
less secure data. Yet we have here evidence of another kind 
and pot-holed surfaces of considerable extent have been found by 
me at various heights from 300 to nearly 8,000 feet. 
In a brief IMemoir like the present it is impossible to quote all 
the authorities, nor has time allowed a more satisfactory digest or 
a wider range of statements. What lias been thus collected is 
brought together in the design of gi\Ing a concise summary of 
the general Geology of tlie Colony, omitting, on account of its 
perplexity, all specific reference to the igneous rocks traversing, 
covering, transmuting, or supporting the Sedimentary deposits. 
In this Edition many new facts liave been introduced with the 
A'icw of bringing on the discoveries that have been made from 
time to time to the present period, when a new system of 
geological inquiry has been just instituted in this Colony. 
If private independent travel and research have not been able 
to accomplish more than this abstract discloses, it may 
