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RST Apology to Tasmanian Aboriginal people 2021.

Notes on the geology and geomorphology of De Witt Island, southwest Tasmania

Papers & Reports

Summary

De Witt Island, off the south coast of Tasmania, is composed of a folded succession of turbiditic silstone, sandstone and conglemerate, at least 450 m thick. It is probably a correlate of the Mid to Upper Cambrian Ironbound Group. Folds are upright, open to tight and at least two generations are indicated. The broad-scale geomorphology of the island is controlled by the direction of storm waves which have eroded nearly vertical cliffs up to 340 m high on the south shore. Many sea caves are found at the base of the cliffs, particularly on
the west and south coasts. Cliff retreat has progressively captured the headwaters of the island’s two perennial streams. Fluvial processes, controlled by both lithology and structure, but also showing possible influence from interglacial and glacial stages, have shaped the interior of the island for a long period. Aeolian processes have deposited sand sheets in the island’s central basin. Some well-developed pseudokarst systems, including sinkholes, caves, underground drainage and airflows, are related to large rotational slumps on the island’s south coast.

 

Keywords:

Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library

Acknowledgement of Country

The Royal Society of Tasmania acknowledges, with deep respect, the traditional owners of this land, and the ongoing custodianship of the Aboriginal people of Tasmania. The Society pays respect to Elders past, present and emerging. We acknowledge that Tasmanian Aboriginal Peoples have survived severe and unjust impacts resulting from invasion and dispossession of their Country. As an institution dedicated to the advancement of knowledge, the Royal Society of Tasmania recognises Aboriginal cultural knowledge and practices and seeks to respect and honour these traditions and the deep understanding they represent.

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On 15 February 2021, the Royal Society of Tasmania offered a formal Apology to the Tasmanian Aboriginal people.