Jig H M. .lOllNSTOX MEMORIAL LKfTrRK. 



Bluff, Cradle Mountain. Mt. Pelion, etc., showing as nunatakr. 

 "Outwash apron gravel.s" deposited by the thaw waters of 

 surface or subglacial streams now cover low-lying -strips 

 around Macquarie Harbour, and thence northwards to be- 

 yond the mouth of the Hcnty River. These uuiwash gravels 

 are separated from one another by deposits of peaty sand 

 and peat. They hav? previously been described as raised 

 beaches, but the writer would point out that while there is 

 evidence there, as in most parts of Tasmania and Australia, 

 of a raised beach up to 15 feet above high water, accom- 

 panied by the presence of marine shells, no trace of post- 

 Tertiary marine shells, as far as the writer is aware, has 

 ever been found in Tasmania at a higher altitude than about 

 ]5 feet above high water. The great shingle terraces, on 

 the other hand, in the neighbourhood of Kelly's Basin, 

 Macquarie Harbour, and to the east of Strahan, attain 

 altitudes of from 200 up to over 240 feet above sea level. 

 Close to Strahan railway station the followinp- section was 

 measured by the writer at the lowest terrace there: — 

 1ft. Sin. Peaty sand. 



6in. to 9in. Loose grey sand. 

 2ft. Oin. Peaty sand. A few pebbles near 



the top. 

 2ft. Oin. Shingle with pebblea mostly 3 to 4 



inches in diameter, restii g on 

 an eroded surface of peaty 

 shale. 

 3ft. Oin, Laminated hard peaty shale, emit- 



ting a sliRhtly woody ring when 

 struck. 

 33ft. fiin. Mostly coarse shingle, pebbles from 



1 inch up to 1 foot in diimeter, 

 oval and well rolled. In tne. 

 lowest 5 to G feet of this bed 

 there are numerous disrupted 

 fragments of carbonaceous 

 shale, belonging apparently to 

 slightly older post-Tertiary or 

 late Tertiary formation. These 

 disrupted fragments are on a 

 line of strong erosion. 

 IS-rt Oin Sandy clay, carbonaceous, passing 



almo.st ir\U peat in places, but 

 the top 5 feet is mostly sandy, 



weathering yellowLsh grey. This 



Total 60ft. Sin. extends down to sea level. 



