158 THE GEOLOGY OF THE LAKE ST. CLAIR DISTRICT. 
wood are not uncommon. ‘These may have come from the 
sandstone. Before concluding I should say that those who 
desire a fuller account of the principal physical features of 
the Lake St. Clair highlands should read a paper by Colonel 
Legge published in the proceedings of this Society. * Colonel 
Legye gives a clear and accurate description of this region, 
and we found his paper of much assistance. 
In conclusion I can only say that I feel that the present 
sketch is incomplete, indeed necessarily so, but still I hope 
that some light, however little, hasbeen shed on the main 
geological features of the Lake St. Clair district. 
Tn the aecompanying map that portion lying to the N. and 
N.W. of Mount Byron I have filled in only from observations 
from the top of Mount Olympus, Mount Manfred and the 
Ducane range are evidently greenstone, as far as their crests 
are concerned at least, but Coal Hill and several other minor 
elevations in its vicinity present an even, flat-topped, and 
terraced structure that strongly suggests horizontal sand- 
stones. 
* Proc. Roy. Soc. Tas , 1887. 
