400 
immistakeably that the Janjukian was reached at depths after 69 feet and down 
to 218 feet. 1 In the Croydon bore the Kalimnan stage is seen between 603 
and 715 feet, and the Janjukian from 970 to 1,681 feet. This extraordinary 
difference of levels cannot, to my mind, be ascribed to an accumulation 
formed in front of a submarine escarpment in the case of the Croydon bore 
and a layer of younger sediments on the Kent Town platform, for the latter 
shows the entire series from Janjukian to Recent as in the Croydon bore. 
In fact, the case is actually paralleled in the Sorrento bore, where 1,700 feet 
of sediments have been long and persistently lowered in front of the Cape 
Schanck to Dandenong fault; whilst in the latter case the upthrow side seems 
to have been positively elevated between Balcombian and Janjukian times, 
otherwise marine sediments of the latter period would be more in evidence. 
This elevation seems to have persisted to the present day as shown by the 
thick ironstone cover upon the Balcombian marine shell-marls on the east side 
of Port Phillip. 
Borings in the Murray Basin of South Australia. 
The boring samples of later date than the Ki Ki bore and Tintinarra 
do not seem to have been examined in detail. I am indebted to Mr. 
A. S. Kenyon, C.E., for samples from the Cotton, Geranium, and Rosy 
Pine bores. On a cursory examination these show, as might be expected, 
very similar characters to those enumerated and described in the body of this 
report. 
Tintinarra Bore. 
This bore is situated in the Ninety Mile Desert, near the Tintinarra railway 
station. The approximate height of the surface above sea-level is 62 feet. 
The depth of the bore is 253 feet. Salt water was struck at 14 feet and fresh 
water at 251 feet. The supply was artesian when first tapped. 2 
The fossils from this bore show, by Prof. Tate’s list, that there has been 
a considerable admixture of samples. The prevailing series, from the data 
supplied by Tate, 3 seem to be the Werrikooian and Kalimnan, probably 
ranging from 26-244 feet. The occurrence of Bankivia fasciata at 244 feet, 
along with Leda crassa, shows the presence, even at that depth, of a 
mixed Werrikooian and Kalimnan fauna. There appears to be no evidence 
amongst these fossils that Janjukian strata were touched in the bore, although 
Prof. Tate records on p. 67 (loc. cit.) “ Eocene (marine) blackish-brown sand 
(with numerous fossils), 244-253 feet.” 
From the great thickness of the Werrikooian shown in this bore the 
locality seems to be situated in an area which was sinking from at least Kalim¬ 
nan times, forming a wide trough into which marine and estuarine shells were 
drifted. Assuming it to be a rift-valley of late Tertiary age, it is probably 
connected with the occurrence of the abnormal thickness of silty material 
found in Bore 9 in the Mallee from 90 to 253 feet. The drowned rift-valleys 
of Spencer Gulf and Gulf St. Vincent may belong to the same system. 
Ki Ki Bore s South Australia . 4 
Four miles west of Coonalpyn, in the Murray basin in South Australia. 
The so-called Eocene sands at a depth of 380 to 424 feet have a fauna con¬ 
taining several restricted Aldingan (= Janjukian) fossils, as Cyprcea ovulateUa , 
Tate ; Scala marice, Tate sp. ; and TurriteUa aldingce, Tate. 
1 Trans. Roy. Soc. S. Aust., Vol. XIV., 1891, p. 350. 
* Rep. Geol. Country South and East of the Murray River—H. Y. L. Brown, 1910, pp. 6, 7. 
* Trans. Roy. Soc. S. Aust., Vol. XXII., 1898, p. 65 et. sea. 
« See Tate. Ibid., Vol. XX., 1896, p. 115. Id., ibid., Vol. XXII., 1898, p. 198. 
