Coffee Rock

Coffee Rock on Fraser Island Beach

As coffee rock (Engl. For coffee-rock ) in are Australia stony hardened occurring, largely impermeable formations sand called.

Sediments of sand and organic matter deposited by rivers in the Pleistocene era formed these formations. The material has a firm consistency and grain , reminiscent of coffee grounds , as well as a dark brown-black color caused by humic substances .

Coffee Rock appears openly on some beaches in New South Wales and in south-east Queensland (including Fraser Island ). Especially on Fraser Island, the Coffee Rock layer seals the numerous lakes and prevents the precipitation from seeping away quickly .

literature

• Moffatt, Bob (Eds.): Broadwater National Park, Bundjalung National Park and Iluka Nature Reserve - Plan of Management / NSW National Parks and Wildlife Service . Hurstville: NSW National Parks and Wildlife Service, August 1997, ISBN 0-7310-7655-9 (English)

Web links

• Information on the geography of Fraser Island ( February 22, 2012 memento in the Internet Archive )
• NSW WILDERNESS RED INDEX: Bundjalung. Colong Foundation for Wilderness Ltd, accessed March 4, 2013 .