148 DISCOVERY OF GLACIATION. 
Mount Tyndall. At an elevation of 3,500ft. above sea level, adjoining 
the greenstone on the south-east side of the mount, I was pleased to dis- 
cover abed of glacial conglomerate containing coal measure fossils ; the 
pebbles are scored in all directions, and many beautifully polished. The 
conglomerate is composed of rocks quite foreign to the country granites, 
slates, porphyry, etc., and as they occur at sush a high elevation, 
embedded together, intermixed with carboniferous fossils, and the 
pebbles scored before the mass was consolidated, there is not the slightest 
doubt that the conglomerate has been formed from the debris deposited 
by floating ice when the land was under water. This also points to 
the fact that the deposit was laid at a previous pericd to the epoch of 
the land glaciation. A small accompanying chart shows the position 
and extent of the bed of conglomerate, which, at the junction of two 
small streams, rises in a cliff 50ft. high, the greatest depth observable. 
The principal ice flows have been from the N.E. and slightly north of 
east. As all the chief features are depicted on the chart, and the scorings 
of the rocks, etc., illustrated by specimens, I have avoided a detailed 
description, but before closing would like to briefly describe the 
moraines. Some rise from two to three hundred feet above the lower 
valleys, those to the west of Lake Margaret are the most extensive, 
and it is in these moraines that the only scored small pebbles and 
rocks were found. Montgomery’s Moutonnées, named after our much 
loved Bishop, is a spur, the rocks beautifully moutonnized, grooved and 
striated with perched blocks restivg picturesyuely here and there, and 
before Sir Robert Hamilton, our late Governor and President, left Tas- 
mania, I received permission from himtoname ‘‘ The Hamilton Moraine,” 
the largest discovered. The point marked Dunun’s Boss is the best illus- 
tration of a roche-moutonnée met with, and is named after the discoverer 
of glacial action in Tasmania. Mr. Dunn named most of the prominent 
features in the part he visited, therefore I have not encroached upon his 
domain. The extremely hard ice-worn country rocks, grooved aud 
striated on the plateau to the highest peaks of the mountains, indicate 
that a vast sheet of ice of great thickness (probably 1,000ft.) has covered 
this region in a colder period. As far as I have observed, the principal 
flows have been to the east and south, the strie being more discernible, 
and the morainal matter being carried into the lower lands; to the west 
and north the ice has melted away before reaching a great distance, 
leaving the morainal matter closer to the high points of the range, and 
in these directions the striations are not so marked. As far back as 
1883, in a report to the Government of an exploration to the West 
Coast, I pointed out the probable existence of glaciation on the Eldon 
Peak and Mount Gell, owing to the erratics and accumulations of 
boulders met with in tne Collingwood Walley, and perched blocks 
found resting on the higher hills, and now the glacial action is proved 
to exist beyond doubt. From personal knowledge, morainal matter is 
scattered over a wide area on the West Coast, and now it will not be 
difficult to trace the course the vast sheets of ice have travelled, and 
before many weeks have elapsed I hope to supplement this paper with 
an account of other discoveries of glaciation remote from the locality 
described. Two names occur on the chart which are not yet officially 
sanctioned, viz., Mount Geikie and Lake Mary. It will be observed 
that Mount Geikie is a distinct mountain from Mount Tyndall (name 
conferred by the Hon. J. R. Scott), is separated by water channels, and 
is 75ft. higher. 
A few of Mr. J. R. Scott’s heights are recorded on the chart 
marked thus (__), my own so(_), 
List of specimens sent to illustrate the rock striation, etc., for the 
Museum :— 
No. 1. A series of polished, grooved, and striated quartz site. 
