CHAPTER XIX. 
THE PEEMO-CAEBONIEEROUS SYSTEM- 
-oontinued. 
the UPPEK BOWEN EOEMATION OUTSIDE OE THE TYPE DlSTElCT-o»«U««.<^. 
iNCixJDiua Townsvilib, Oaky Ceebk, and Little Eitbb, Oooktown. 
Nobih of the Bowen Eivcr, strata of the age of the Tipper Formal ion of the Bowen 
Eiver Coal Field arc met with in the neighbourhood of Towusvdle and Cooktown. 
A cutting on the Northern Railway, near Stewart’s Creek Station, exposes som 
thin beds of conglomerates, sandstones, shales, and fireclays, which have yielded Glossop- 
A sheet of porphyry is intruded among the strata. During the progress o 
lome ei:ations for the'purpose of straightening a curve, some thin lenfocnlar seams 
of coal were exposed. Of one of these I made the following analysis in 1887 : 
Water 
■Volatile 
Fixed carbon 
Ash 
100-00 
Similar beds are seen on the adjacent Aboriginal Reserve, where an adit driven 
horizontally into a hillside exposed beds containing Glossopteris ig 
plants in large numbers. Here the shales and sandstones are interstratified with bea 
of nearly due south of an old bore sunk by the Townley 
Coal Company, a sandstone bed, seven inches thick, rests upon shales and is covered by 
sheet of lava. Near the south-eastern extremity of the hills, about 180 teet above the s 
level blue-black shales and six inches of impure coal liehorizontally beneath volcanic as _ 
’ At one spot the shales are » porcellanised,” but the induration does not appe 
to extend for any groat distance. These baked shales dip at 23 to S.8.E., and 
upon and are covered by volcanic rocks. jg 
“ The age of these volcanic rocks appears to be contemporaneous with the be 
at Stewart’s Creek.” * , , , j -u j faulted 
At Stewart’s Creek Railway Station the rocks already described are taut 
against volcanic ashes. These, at a height of 120 feet above the station, on the weste ^ 
bank of one of the heads of Stewart’s Creek, show what appear to be bedding-plau 
running north-north-east. Some distance further west, on the fall of the next gul y, 
ashes are seen to assume a very coarse character, with fragments about the size o 
ea". Traced further north, these beds pass almost insensibly into what appears 
a medium-grained granite, the weathered surface of which is often pe^Wy, 
the probability of the granite being mctamorphic. Near the summit of the ndge 
of the Railway Station, the ashes contain lenticular lava-beds, the internal porti n 
which are wavy and contorted, looking very like fluxion-structure, but simulating 
appearance put on by some rocks which have been subjected to intense pressure. 
* Report on the Physical Geology of Magnetic Island, 
by Authority : 1892. 
&c. By A. Gibb Maitland. BrishaU® 
