The West Coast Geotrail by Ralph Bottrill, Mineral Resources, Tasmania

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An exceptionally diverse range of geological features are readily accessible and prominently exposed in Tasmania. The relatively small island includes ancient, glaciated mountain ranges, through to relatively young volcanoes, including world class ore bodies, rare and beautiful minerals, and fossils and rocks from all the major geological periods of Earth history. Three main geotrails have been created in northwest, southeast and western Tasmania all designed to provide information about the geological backdrop to Tasmania’s iconic landforms and mining history. These are all self-guided trails have been designed and supported by different groups and individuals. They are:
• THE LYMINGTON GEOLOGICAL TIME TRAIL created some decades ago by a Cygnet tourist operator to highlight some unusual rock types, well exposed in several sites along the Huon river banks, some associated with gold deposits.
• CREATED FROM CHAOS: This geotrail, supported by local councils, along the central to northwest coast of the state, promotes 13 spectacular coastal geological features.
• THE LIVING EARTH: This West Coast GeoTrail was developed in 2015 by the Government’s Mineral Resources Tasmania and the West Coast Council to enable visitors and locals to understand and appreciate the geological processes which formed not only the spectacular landscapes and rocks well exposed in the region, but also highlighting areas of climate change, and the formation of mineral deposits in the State’s mines. The West Coast GeoTrail highlights 16 roadside sites. In time, it is hoped that this project will extend around the state to provide the geological story of Tasmania to travellers.

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The West Coast Geotrail by Ralph Bottrill, Mineral Resources, Tasmania

  1. 1. THE WEST COAST GEOTRAIL UNDERSTANDING THE LANDSCAPE AND GEOLOGY OF WESTERN TASMANIA Ralph Bottrill Mineral Resources Tasmania Department of State Growth, 12/8/16
  2. 2. THE HISTORY OF TASMANIA  Arrival of Europeans - ~300yrs  Arrival of Aborigines – 40,000 yrs?  Arrival of Flora and Fauna – Millions of years!  But the rocks – some may date back to over 1200 Million years!  The rocks are our foundation, they underlie all our spectacular landscapes and scenery!
  3. 3. UNDERSTANDING THE GEOLOGY AND LANDSCAPE OF WESTERN TASMANIA The Living Earth Showing how the earth is a dynamic, ever- changing body Tourists are increasingly interested in natural history, including geology A Tas Govt initiative in 2015 to help the West Coast by designating a Geopark, which turned into Geotrail Directed by Dept. of State Growth, especially Mineral Resources Tasmania, assisted by the West Coast Council. Each site has a roadside sign either: • a large sign with information, • or a small sign with a QRCode weblink to the Living Earth website The website (www.thelivingearth.com.au) has both general and detailed information on all the sites, and downloadable pdfs The West Coast GeoTrail
  4. 4. LIVING EARTH WEB PAGE
  5. 5. Visit www.thelivingearth.com.au for more information
  6. 6. Sedgwick Bluff Mt Lyell West Lyell Open CutNorth Lyell MineCape Horn Mine Sedgwick Bluff Mt Lyell Mt Owen Great Lyell Fault Philosophers RidgeCape Horn West Coast Range from Spion Kop West Coast Range from Spion Kop
  7. 7. Darwin
  8. 8. Iron Blow
  9. 9. ZEEHAN ALSO A SIGN AT TULLAH
  10. 10. SPRAY TUNNEL
  11. 11. TRIAL HARBOUR
  12. 12. TRIAL HARBOUR Trial Harbour
  13. 13. LAKE SELINA & LAKE PLIMSOLL
  14. 14. TYNDALL VALLEY
  15. 15. CHALLENGES!  Logistics  Access  Parking  Phone coverage  Sign visibility  Different focus groups  Coordination  Money  Advertising
  16. 16. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Corinna district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet
  17. 17. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Pieman district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet Image by Faye Hulme
  18. 18. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Pieman district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet
  19. 19. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Pieman district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet Image from the Mercury
  20. 20. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Corinna district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet Image courtesy of Adam Plucinski
  21. 21. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Corinna district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet Image courtesy of http://www.tamarvalley.com.au/
  22. 22. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Pieman district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet Image courtesy of Rob Blakers
  23. 23. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Pieman district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet Image courtesy of Stephen Kilburn Image courtesy of Jeff Flueger
  24. 24. THE FUTURE? A Tasmania- wide Geotrail?? • Cradle coast trail • Waratah-Pieman district • Cradle Mtn - Sheffield area • Bay of Fires • Tamar Valley • Freycinet • Tasman Peninsula • Cygnet

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