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grooves running parallel with the valley, indicating that a 

 great stream of ice has flowed down the course of the Clarke 

 River, located in the centre of the valley, smoothing the bed 

 rock and carrying the debris brought from the surrounding 

 heights into the lowlands. The smaller tributaries are like 

 the larger streams cut down into the solid rock, and contain 

 few traces of moraiual matter in their beds. The soft schist 

 and porphyritic rocks on the hummocky and flat rises at the 

 head of the valley have their exposed surfaces worn smooth, 

 and are overlaid with a thin coating of fragmentary ice-worn 

 quartz, or have large erratics with perched blocks resting on 

 their ice-worn summits. The river, after leaving the valley, 

 takes a south-westerly course, and cuts through two large 

 spurs, and in its now rapid course runs straight for Farm 

 Cove, which beautiful inlet and its glaciated boulder pro- 

 montory make a charming picture looking from the south end 

 of the valley, the only portion of the harbour visible. After 

 reaching the lower lands the stream turns to the eastward 

 and runs in a sluggish course, emptying at last into Kelly's 

 Basin. Bocks similar to those observed on the harbour can 

 be obtained on the highlands, and it is reasonable to suppose 

 they have been transported from there down the Clarke 

 Biver gorge, seeing thdt the general tend of that stream is in 

 the direction of the glacial point. 



If we look at the precipitous south end of Mount Sorell, 

 not more than three miles from Farm Cove, with its steep 

 spurs running into the harbour, it is easy to suppose that if 

 the glaciers have not descended to water level, that blocks of 

 ice and ice-worn boulders may have been hurled into the 

 harbour. From what I have observed I favour the opinion 

 that the glaciers have travelled to water level, for we find 

 spurs close to the shore of Kelly's Basin and Farm Cove 

 stretching for two to three miles in the direction of French- 

 man's Cap, Craycroft Hills, Mounts Sorell and Darwin, 

 covered with moraiual matter. These spurs or moraines are 

 composed of a clay intermixed with pebbles and boulders, 

 wholly different in composition and material to the sedi- 

 mentary raised beaches. 



I feel no doubt in my own mind that the pebbles and 

 boulders are ice-borne, for we find in many cases two sides 

 and an end planed, while other parts are rough, a notice- 

 able feature in glaciated stones, compared with the rounded 

 surfaces of those worn by water, indistiuct scorings can be 

 observed by a practised eye, to the sceptical perhaps they 

 would not be distinguishable. 



Mount Sorell is one ofthe highest prominences in the West 

 Coast Bange, and though we do not find the stria? and 

 grooving on the rocks at such a high altitude as in the 

 vicinity of Mount Tyndall, this would give a larger collecting 



