

646 RECORDS OF THE S.A. MUSEUM 
entirely stable land mass in Pleistocene time this heiglit would be sufficiently close 
to that of the Milazzian Terrace to give a significant correlation, Lewis claims an 
active tectonic rise of the Tasmanian land niass as well as foundering of the 
adjacent coasts, during his Millbrook Rise, Le does stress the general horizontality 
of both the ‘‘pre-glacial"’ terrace of his Launceston Stage, and of the Millbrook 
Rise, thus giving slight support for a possibility that the Millbrook Rise Terrace 
was substantially of eustatic rather than tectonic origin. Identification of the 
Malanna glacial as pre-Milazzian and, therefore, probably to be correlated with 
the Early (Giinz) glaciation might be attractive, particularly since Lewis seems 
positive that the Malannan glacial low terrace was the first such low sea level 
episode evident in Tasmania. However, this identification at onee introduces 
difficulties which are largely resolved only when the second possible correlation 
outlined above is examined. 
Between the beginning of the Millbrook Stage and the onset of the first phase 
of the double Yolande glacial, Lewis placed the “‘longest of the Tasmanian inter- 
glacial periods,’’ This at once suggests a link with the Tyrrhenian, by far the 
longest and @reatest of the interglacials of the Mediterranean area and elsewhere. 
If this datum were accepted it would at once tie in with the Kast Avenue Inter- 
glacial of South Australia, which may have been of great duration, as indicated 
by the extensive series of littoral sediments, in alternate dune aud swale up to 
fourteen miles wile, constituting the largest series of such sediments left stranded 
on any interglacial terrace of the South Hast of South Australia, 
According to this identification the Malanna Glacial might scem to correlate 
with the Mindel (Antepenultimate) glacial stage rather than with the Giinz 
(Barly) glacial, unless as is possible, Mindel was only a relatively weak stage in 
Tasmania, In the latter ease, traces could either have been masked by erosion 
and later ¢laciations, or might merely await identification, 
Tt will be noticed that the suggested height of 150 feet (45 metres) for the 
Millbrook Stage terrace would match about as well with the Tyrrhenian (105 feet) 
as it world with the Milazzian terrace (195 feet). Teetonie movements suggested 
by Lewis could be utilized to explain the difference unless there was in faet an 
earlier phase of the Tyrrhenian nearer the 150 feet mark, as seems to be implied by 
the existence of the Baker phase of East Avenue Terrace in South Australia 
Accepting for the moment the 1dentification : 
Tyrrhenian—Millbrook Stage—Last Avenue Terrace; later glacial stages 
appear to fall rather readily into place. 
Thus: 
Yolande 1=Riss (Penultimate Glaciation, Phase I). 
Yolande 2=Riss (Penullimate Glaciation, Phase IT), 
Margarel—Wiirm (Last Glaciation, Phases I-IIT). 
