Log of Well No. 1, Lander Oil Company Limited, Orallo Parish, County of Waldegrave, Queensland, Australia — continued. 
From — 
To — 
Thickness?. 
Formation. 
1,895 
1,945 
50 
Brown sandy shale, streaks of gypsum and shell 
1,945 
1,950 
5 
Hard sandy brown shale 
1,950 
1,990 
40 
Sticky brown shale 
1,990 
2,003 
13 
Silty brown shale and shells 
2,003 
2,030 
27 
Brown sandy shale, streaks of shell 
2,030 
2,090 
60 
Tough brown shale, streaks of sand 
2,090 
2,100 
10 
Gray limestone 
2,100 
2,110 
10 
Hard brown shell 
2,110 
2,118 
8 
Hard sandy shale 
2,118 
2,129 
11 
Gray sand, showing oil and gas 
2,129 
2,140 
11 
Hard brown shale 
2,140 
2,150 
10 
Sandy brown shale 
2,150 
2,153 
3 
Hard gray shell 
2,153 
2,155 
3 
Grey sand, gas, and oil 
2,155 
2,198 
43 
Sandy brown shale, showing gas and oil 
2,198 
2,233 
35 
Brown oil sand 
Finally a word must be said about the application of the carbon-ratio theory to this region. 
The only coal analysis available to me at the time of writing is the one already quoted of coal from 
the shaft at Injune. The ration of fixed carbon in this coal was 55.75, which indicates a very 
satisfactory stage of metamorphism in the coals for the presence of oil in the associated strata. 
H. Conclusions. 
Summing up I find that the evidences against the existence of oil in payable quantities 
in the region under consideration are : — 
S’ 
(1) The entire absence of surface indications throughout the area. 
(2) The absence of brines in connexion with the showings of oil and the flows of wet 
gas which have been met with also in beds of sand which might otherwise be 
suspected to contain oil in places. 
(3) The uncertainty that exists in the absence of detailed geological information 
with regard to the existence of suitable structures which could contain oil 
in paying quantities and the difficulty of locating such structures. 
(4) The high geothermal gradients which result in high temperatures ^ at depths of 
3,000 feet and over which might result in. dissociation of liquid petroleum, 
leaving only heavy residues at such depths as at Ruthven, Springleigh, and 
Longreach, together with accumulations of wet gas such as those which exist 
at Roma. 
On the other hand, the favorable features are - 
(1) The existence of quantities of wet gas under great pressure, the gas itself having 
been proved to be present in quantities which should pay for exploitation 
with the extraction of petrol by means of suitable extraction plant. 
(2) The proved existence of actual oil at depth in the Walloon strata along the edges 
of the Great Artesian Basin of Central Queensland. 
(3) The existence of suitable strata for the oil to have originated therein and the 
presence of very satisfactory fixed carbon-ratios in coal seams associated 
therewith. 
(4) The existence of both suitable storage and cover rocks in this area. 
(5) The possible, perhaps probable, presence of suitable geological structures for the 
accumulation of oil in paying quantities, and the absence of considerable 
faulting or folding in the strata. 
(6) The absence of undue interference with the strata by igneous intrusives. 
