2.—FIFTH REPORT OF THE COMMITTEE 
ON 
GLACIAL ACTION IN AUSTRALASIA. 
EVIDENCES OF GLACIATION IN HINDMARSH VALLEY 
AND KANGAROO ISLAND. 
MEMBERS: 
Captain F. W. Hurton, F.R.S.; Mr. R. L. Jack, F.G.S., 42 ReGees 
Professor TATE, F.G.8.; Mr. R. M. JOHNSTON; Mr. G. SWEET, 
F.G.S.; Mr. J. STIRLING; Mr. W. HowcuHin, F.G.S.; Mr. E. -G. 
Hoae, M.A.; Mr. E. J. DUNN, F.G.S.; Mr. A. MONTGOMERY, M.A., 
F.G.S.; Mr. E. F. PirrMAn, A.R.S.M.; Professor T. W. E. DAvVIn, 
B.A., F.G.8. (Secretary). 
With Plates 1 and 2. 
SINCE our last report was presented to this association, observa- 
tions have been made which have advanced our knowledge of 
the area included in the extinct icefield in South Australia in 
two directions. One of these comprehends the Hindmarsh 
Valley, which is roughly parallel with the Inman Valley, already 
described ; and the other, more distant from the supposed centre 
of glacial action, comprehends the north-eastern portions of 
Kangaroo Island. 
Tue HrxpMarsH VALLEY. 
def. Trans: Royal Soc. 5:A.,; 1898; Vol. xx. p12: 
The Hindmarsh River, although possessing a distinct outlet to 
the sea, may be considered as belonging to a larger valley system, 
in which the Inman, the Hindmarsh, and the Back Valley are 
collateral lines of drainage. The Inman River occupies the cen- 
tral line of drainage in the main valley, confined by two lateral 
ranges of hills about 500 ft. to 600 ft. in height. The easterly 
range separates it from the Hindmarsh Valley on the one side, 
and the western range separates itfrom the Back Valley on the 
other. It has been shown in a former report that the Inman 
and Back Valleys, with the range of hills separating them, are 
comprehended in one continuous deposit of glacial drift, and 
as the Hindmarsh Valley, with its intervening range, must be 
included within the same larger valley system, it seemed highly 
probable that the Hindmarsh section would also yield proofs that 
it had been subjected to similar glacial conditions. This has now 
been demonstrated to be the case. 
