It is three miles in length, and one in greatest breadth, its outline irregular from the number of bays and small rocky headlands.

On its western side the bays are small, and the shores generally steep and rocky, with sandy intervals, the banks being covered with brush of the usual Australian intertropical character.

The rock here is either a stratum of ironstone in irregular masses and nodules cemented together by a ferruginous base, or a very coarse sandstone, almost a quartzose conglomerate, forming cliffs, occasionally thirty feet or more in height.
The latter stone is suitable for rough building purposes, such as the construction of a pier, but is much acted on by the weather.

On the northern and eastern sides the bays are large and generally sandy, with the land sloping down towards them from the low undulating hills, which compose the rest of the island.

These hills are either sandy or covered with ironstone gravel* over red clay.