
622 RECORDS OF THE S.A. MUSEUM 
of Tasmania. At Jacob Boat Harbour, for example, there are two high shore 
platforms, one at 10-15 feet (3-4-5 metres) above sea level, the other at 40-50 feet 
(11-15 metres), backed by a basalt-capped scarp representing the old eliff line, 
Two sea caves on opposite faces of Rocky Cape are cut into cliffs of white 
quartzite. Aboriginal kitchen mididen deposits cover their Hoors, in one case to a 
depth of 10 feet (3 metres) and in the other to 20 feet (6 metres); the Dases of 
the caves are at 50 feet (15 metres) above sea level and their ceilings are up to 
30 feet (9 metres) higher, 
Edwards considered that remnaits of three shorelines can be found all along 
the north-west coast, one at 5-15 feet (1-5-4-5 metres) above sea level, another 
at 40-50 feet (11-15 metres) above it; also traces of a third at about 100 feet 
(approximately 31 metres). He observed the probable existence of a submerged 
shoreline between —120 feet and —150 feet (-87 to -45 metres), and indications 
of another still older prebasaltic submerged strandline. 
Tu view of the evidence afforded ly the sea eayes al Rocky Cape it is possible 
that Edwards should have placed his 40-50 feet strandline at a minimum of 
about 50-60 feet (15-18 metres) above sea level. Also, since similar methods were 
used to estimate the height of the lower terrace, it should perhaps be read as at 
15-25 feet. (4-5-6 metres) rather than 5-15 leet above sea level. The evidence for 
his terrace at about 100 feet (31 metres) may receive support from the early work 
of Johnston (1888) who recorded raised beaches at about 100 feet above sea level 
on Chappell Island in Bass Strait, 
Summarized Edwards’ conclusions were: 
Giinz Glacial “8 oe °4 Pre-basalie submerged strandline 
Mindel Glacial nd Hy -. Forth Valley formed 
Mindel/Riss Interglacial |, a! 100 to 150 foot terrace 
Riss Glacial .. 7 wt 25 ~120 to -150 feet submerged terrace 
Riss/Wiirm Interglacial  .. rs 40-50 feet terrace 
Wiirm Glacial “sy Ys ts no reference made 
Post-Glacial . , 7 vie le o-15 feet terrace 
Lewis (1945) in posthumously published notes edited by D, BE. Thomas, 
summed up over a decade of work on glaciation in Tasmania. Ile regarded the 
beginning of Pleistocene time in Tasmania as prior to the onset of glacial conditions. 
He identified as pre-glacial a ‘‘Launceston Stage’? with two relatively con- 
temporary floras featuring Nothofagus and Eucalypins respectively, indicating 
either relatively mild damp or even warm conditions as then prevailing in 
Tasmania, Immediately following the Launceston Stage came a lowering of sea 
level, of the order of 350 feet (108 metres), leaving a terrace which he claimed to 
