86 SUNKLANDS OF PORT PHILLIP BAY AND BASS STRAIT 
unconsolidated dune sand, some of wMcli has accumulated within 
the last 100 years. Since the Nepean Peninsula has been largely 
cleared of timber, the higher points of the consolidated dunes 
and dune ridges exposed to the prevailing wind are being dis- 
integrated, and relapsing once more into moving dunes. 
The Nepean Peninsula was geologically surveyed and contoured 
by the author in 1927, as far west as Rye; Pig. 5 is compiled 
from this survey and other sources. 
FIG. 6. 
The Shoals of Port Phillip Bay. 
