RELATIONSHIPS OF THE AUSTRALIAN CAINOZOIC SYSTEM. 
above, and comparable with those beds known elsewhere, as in 
Western Victoria, as the “ older gold-drifts.” The general sequence 
of the strata in Port Philip between Frankston and Mornington 
appears to be easily explained by the accompanying diagram (Fig. 4). 
Still on the downthrow side of the great fault of Port Phillip 
and on the opposite (west) side of that great inlet, are situated 
Altona Bay and Newport, at which places deep shafts have been put 
down, extending into Balcombian strata, and affording a continuous 
series from surface level. These bores reveal several seams of lignite 
or brown coal, one of which is 74 feet in thickness. Unfortunately, 
no detailed and scientific 
account of the strata 
passed through in these 
bores is available, but the 
data given by the engineers 
show that the beds are 
very variable in character, 
and a general idea may be 
gained as to their nature. 
The bed-rock, probably an 
Ordovician slate (Fig. 5), 
was struck in Bore No. 1 
at Altona Bay (Sect. VIL., 
parish of Truganina) at 
Holoc@ne and 
PieisStocene 
Yellow sands 
and clays - 
Kali mnan 
ana 
Janjvkian 
Calcareovs 
blue clays 
with shells 
NWiGQGwoorr1vG 
656 ft. 3 in., and pene- lignite 
trated a _ thickness of bands 
238 ft.4 in.* Above this 
bed-rock thereisa variable ; 
series of gravelly sands gravelly 
and lignitiferous clays, Sands 
with occasional seams and clays 
containing broken shells, 
which amounts to a thick- 
ness of 235 ft.6 in. Above 
this, again, occurs a brown 
coal bed 70 ft. 5 in. thick. 
The succeeding calcareous 
clays and limestones, as 
well as those just men- Fig. i 
tioned, are of Balcombian jePeickieie 
age, and have yielded an D'!AGRAM SECTION 
extensive fauna, chieflyof NER ALTONA BAY, Porr Ptttuuie. 
mollusca, which have been listed by Messrs. Thiele and Grant, 
and more recently by Messrs. Dennant and Kitson.{ The latter list 
Ordovician 
GiWaeker 
* Ann. Rep. Dept. Mines, Vict., for 1902 (1903), p. 69. 
{ Proc. Roy. Soc. Vict., vol. xiv., pt. 1, 1901, p. 145. 
t Rec. Geol. Surv. Vict., vol. 1, pt. 2, 1903. 
[31 ] 
