398 
Borings in the Adelaide Basin. 
These show some remarkable differences in the comparative levels 
of each horizon, in borings removed from one another by only a few miles. 
The data given below are taken from accounts of the earlier bores already 
published, with annotations respecting the various horizons met with, as 
viewed in the light of these later investigations. 
Kent Town Bore. 1 
The level of the surface is 138*83 feet above low-water mark. 
Depth. 
Horizons. 
Tate. 
Chapman. 
0-2 
Recent surface accumulations 
• 
) Holocene to Werrikooian. 
2-69 
Pliocene loams and gravels 
69-218 
Marine Miocene 
|Kalimnan. 
218-360 
Lacustrine Miocene 
1 Janjukian. 
Janjukian (similar carbona 
360-411 
Pre-Silurian (felspathic 
ceous, sandy beds are met 
with in the Murray basin, and 
are probably comparable with 
those of the Aire coastal bed 
in Victoria). 
quartzite, slaty rock and 
fine-grained sandstone). 
Water was struck in a white quartz sand overlying the marine Tertiary 
beds at 69 feet. 
Croydon Bore. 
This is situated 3J miles from Adelaide. Two borings were made. No. 1 
attained a depth of 800 feet; No. 2, 2,296 feet. 
Older Pliocene strata were found in Bore 2 at 603-606 feet, and at 705-715 
feet. Prom 970-1,681 feet the Janjukian or polyzoal rock facies is in evidence. 
Palaeozoic rocks were met with at 2,262-2,296 feet. 
The list of fossils given by Prof. Tate 2 from this bore at 970-1,681 feet is 
interesting for comparison with a nearly identical fauna in the Victoiian 
Malbe bores. 
“ Turritella aidingce, Tate. 
Mesalia stylacris , Tate. 
Dentalium mantelli, Zittel. 
,, subfissura, Tate. 
D'mya dissimilis, Tate. 
L ma bassi , T. Woods. 
Pecten eyrei, Tate. 
,, flindersi , Tate. 
,, hochstetteri, Zittel. 
1 Trans. Roy. Soc. S. Anst., Vol. XXII., 1898, p. 196. 
2 For the details of this bore, see Tate, R., Trans. Roy. Soc. S. Aust., Vol. V., 1882, pp. 40-43. 
