
TINDALE—SUBDIVISION OF PLEISTOCENE 627 
with the Woakwine terrace of South Australia in situation and elevation. Over 
a thousand bores and excavation made in search of black sand have yielded detail 
for observations on the present shoreline. Using the evidence afforded by the 
normal concentration of these heavy sands by storm waves, in the berm at a 
height of six to eight feet above ‘‘mean sea level,’’ Beasley deduces the following 
sequence : 
Wiinn yvlacial (Sea level at 200 feet below present sea level, ) 
Post-Pleistocene terrace 25 feet above present sea level. 
Mid-Reeent Rapid emergence to 10 feet above sea level, 
Present Slow emergence to present sea level. 
The original paper should be consulted for details. hese are useful in 
helping to interpret the detailed history of Post-glacial shorelines and they seem 
to agvee stibstantially with features reported elsewhere, as, for example, those 
at Fulham in South Australia (Tindale, 1987), where, superimposed on two 
gencrations of old red sandhills, there are lacustrine features dated in Recent time, 
The 25 feet terrace is shown by Beasley as Post-Pleistocene, rather than 
either pre-Wiirm glacial in accord with Zenner (1945) or Wiirm 2/3 Interglacial 
as according to Keble (1946). If either of the latter datings has merit, it may be 
that the Beasley 10 foot terrace is the Post-Glacial one. Tere have been eoncen- 
trated the black sands gleaned by wave activity during the Post-Glacial rise of 
sea Jevel from the —200 feet level, This may well explain the reported absence or 
dispersal of such sands from the earlier 25 fect (7-5 metre) terrace. 
L. A. Cotton (1947), whose Clarke Memorial address has become available 
since this paper was in draft, surveys the distribution of terrace levels between 
—600 feet and +600 feet in both stable aud unstable areas surronnding the 
Pacifie Ocean, The nitmbers of terraces appear to increase with instability. Some 
terraces are of wide lateral extent; these are eustatic; it being unlikely that land 
movements of the same vertical range could extend over very large areas. Such 
epeirogeni¢ movements as have been proved are usually accompanied by warping. 
Despite nncertainties introduced by inaccurate methods of measuring heights in 
areas not yet eritically surveyed, there is marked correspondence in the heights of 
enstalic terraces. 
Tlis summary draws attention to the great available amount of local evidence 
for terrace formations and, although not directly expressed, his survey points wp 
the importance of further field work in tracing the lateral extensions of the various 
observed terraces. 
