
TINDALE—SUBDIVISION OF PLEISTOCENE 633 
position and trend has determined roads and survey layout of the country for a 
north-south distance of over 100 miles; only to the south where more extensive 
solution of limestone dunes has taken place has quartz sand drift been a determin- 
ing factor in causing roads, ete, to be placed a little away from the actual front of 
the ferrace. The exaet correspondence of terrace height over such distances 
probably precludes the terrace being due to any epeirogeniec moyement of uplift, 
Reedy Terrace, between the Hundred of Kennion and the Hundred of Mur- 
rabinna, over a distance of 50 miles, is ent obliquely by the Reedy Creek stream 
bed, the coast-side Gunes beiug known as the Reedy Creek Range, the inJand dimes 
as the West Ayeune Range. North of the Hyiudred ot Murrabinna ithe two 
“ranges ’’ become one, being separated only by minor interdune swamps represent- 
ing former drainage channels. The inland side of West Avene Range preserves, 
in solid limestone covered by a veneer of quartz sand, many features characteristic 
of the Bevilaqua Ford area behind the “ Present.’ dunes near Rivoli Bay. At such 
places as Avenue Plains, Mt, Scott and Smith Swamp it is diffieull {o realize that 
one is not near the oeean, The height on the Reedy Terrace at which were laid 
down the earliest dunes forming West Avenue Range, can be determined as 
greater than 70 feet, but probably no higher than 90 feet, 
Since the front of Reedy Creck Range is a relatively mature wave-cut noteh, 
the actual terrace height is greater than the 45 feet registered by the floor of its 
foreshore. To assist in determining the height of the actual terrace the following 
data is available. 11 will be observed that the floor of Reedy Creck in the Hundred 
of Murrabinna, just before it breaks through the Reedy Creck Range at Blackford, 
varies Irom 58-61 feet. This may determine that the principal series of Reedy 
dunes were laid down at a height of approximately 64 fect (19°5 metres) above 
present sea level (L.W.0.8.T., Port Adelaide), 
Present difficulties in acenrately determing the height of Reedy Terrace are 
die to the physiographie evolution which has gone on since the ferrace was formed 
and to lack of accurate survey height data, excepting for old stream beds, on the 
inland side of West Avenue Range, These channels, which come together in 
County Cardwell to pass through the Reedy Creek Range as Brown Cattle Creck, 
are mature streams and have lowered their beds below the former heizht of the 
jerrace, so that, for example, between Avenue Plains Station and the southern 
boundary of County Cardwell (a distance of 40 miles) there is now a regular fall 
from the 78 to the 59 foot mark (6 inches per mile). At Mt. Bruce the floor of 
Aveniie Creck is at 89 feet, while a few miles further south, Reedy Creel at 
Kennion, stands at 94 feet as it flows through West Avenue Ranve in a channel now 
choked with its own debris. 
Formerly Reedy Creek flowed into the sea near Iatherleigh; there is in that 
