Nobby Islet

[1][2] The islet is difficult to access due to its location in shallow water adjoining a cliffed coastline that exposed to rolling seas and the fragile condition of its vertical cliff faces.

It is also observed that there was recent evidence of rockfalls due to the crumbly consistency of the calcarenite and that debris cones were present on its relatively sheltered northern side while any collapsed materials on its southern face had been washed away by wave action.

The islet's summit was also reported as being 'gently terraced by resistant layers of calcrete that retain bands of sandy soil'.

The islet is located in waters of a depth of about 5.5 metres (18 feet) that partially conceal wave-cut platforms and that are subject to rolling seas.

[8] As of 2012, the waters surrounding its shores are part of a restricted access zone located within the boundaries of the Southern Kangaroo Island Marine Park.