Bushwalking in the Bungle Bungles

The distinctive beehive-shaped towers of the Bungle Bungle are made up of a very fragile sandstone. When the overlying rock which holds the sand grains in place is removed, the sandstone is easily eroded. Water flowing over the surface will exploit any weaknesses or irregularities in the rock, such as cracks or joints, and rapidly erodes the narrow channels that separate the towers. The distinctive orange and grey banding is caused by differences in permeability. Where water can move through with relative ease, moisture seeps through to the rock surface, promoting a dark algal growth. The less permeable layers are covered with a layer of iron and manganese, creating the orange bands. These outer coatings (the rock beneath is a whitish colour) help to protect the lower parts of the towers from erosion.

Purnululu was listed as a world heritage site in July 2003. The following quote is from the Australian Department of Environment and Heritage website.

"Famous for the 45 000 hectare Bungle Bungle Range, with its huge expanse of striking banded beehive structures, sandstone cliffs and towers, Purnululu has been listed as an outstanding landscape that is a superlative natural phenomenon, revealing the history of its formation over hundreds of millions of years. Purnululu National Park has such outstanding universal natural values that it enriches the world and should be conserved for the benefit of all people. Before 1982, when aerial pictures were first released, it was virtually unknown except to pastoralists, scientists and the local Aboriginal community. It is now seen as one of the scenic jewels of outback Australia."

For more information on Purnululu's World Heritage status, see the

• UNESCO Description of the World Heritage listing.
• 72 page PDF of the Australian government application for World Heritage status for Purnululu. The document contains a wealth of information (much more information than in the actual listing) as well as some beautiful photos. It's over 2MB, so you'll need a lot of patience if you don't have a fast internet connection.