DOCSLIB.ORG

Ecological Status of the Derwent and Huon Estuaries

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Ecological Status of the Derwent and Huon Estuaries NHT/NAP FINAL REPORT ECOLOGICAL STATUS OF THE DERWENT AND HUON ESTUARIES Catriona Macleod and Fay Helidoniotis November 2005 NHT/NAP Project No. 46928 National Library of Australia Cataloguing-in-Publication Entry Macleod, Catriona (Catriona K.). Ecological status of the Derwent and Huon estuaries. Bibliography. Includes index. ISBN 1 86295 287 6. 1. Estuarine health - Tasmania - Derwent River Estuary. 2. Estuarine health - Tasmania - Huon River Estuary. 3. Estuarine pollution - Tasmania - Derwent River Estuary. 4. Estuarine pollution - Tasmania - Huon River Estuary. 5. Ecological surveys - Tasmania. 6. Derwent River Estuary (Tas.). 7. Huon River Estuary (Tas.). I. Helidoniotis, F. II. Natural Heritage Trust (Australia). III. National Action Plan for Salinity and Water Quality (Australia). IV. Tasmanian Aquaculture and Fisheries Institute. Marine Research Laboratories. V. Title. 577.78609946 Published by the Marine Research Laboratories- Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Private Bag 49, Hobart, Tasmania 7001. E-mail: [email protected] Ph. (03) 6227 7277 Fax (03) 6227 8035 The opinions expressed in this report are those of the author/s and are not necessarily those of the Tasmanian Aquaculture and Fisheries Institute. Copyright protects this publication. Except for purposes permitted by the Copyright Act, reproduction by whatever means is prohibited without the prior written permission of the Tasmanian Aquaculture and Fisheries Institute. © Tasmanian Aquaculture and Fisheries Institute, University of Tasmania 2005. NHT/NAP FINAL REPORT ECOLOGICAL STATUS OF THE DERWENT AND HUON ESTUARIES Catriona Macleod and Fay Helidoniotis November 2005 NHT/NAP Project No. 46928 Tasmanian Aquaculture and Fisheries Institute Marine Research Laboratories Biological status of the Derwent and Huon Estuaries Biological status of the Derwent and Huon Estuaries Catriona Macleod and Fay Helidoniotis Executive Summary This study was undertaken to fill a significant gap in our understanding of the system ecology of the two main estuaries in southern Tasmania and to provide baseline information to assist in the ongoing management of these systems. The Derwent and Huon estuaries are similar in their biogeographical, climatic and physical characteristics but differ markedly in their levels of industrialisation. The Derwent estuary is highly impacted with several major industrial and urban contamination sources throughout its catchment. Heavy metals in particular, represent a considerable threat to the system. In contrast the Huon estuary is largely unimpacted, finfish aquaculture being the only major industry affecting the system, although there is potential for future development and industrialisation. Both the Derwent and the Huon estuaries are strongly depositional with the majority of the estuary composed of soft sediments. These sediments will act as a repository for any contaminants to the system and the benthic infauna will in turn reflect the cumulative effects of these pollutants. There is considerable information on the various anthropogenic loadings to the Derwent and on the effects of these on water quality, but prior to this study there was very little information on the biological consequences of these contaminants. Information on the benthic ecology is an essential pre-requisite to any effective management strategy. Accordingly, in order to determine the overall impact in the estuary or to evaluate future remediation, baseline information on the current biological condition of the system was essential. This study undertook a broad assessment of the ecological changes in both estuaries. Extensive spatial sampling was undertaken throughout the estuaries in order to characterise the benthic communities. These communities were then evaluated in relation to the changes in the natural environmental conditions as well as changes in the level of organic enrichment and metal contamination. Infaunal samples in the Derwent were taken at 55 sites which coincided with sediment sampling previously undertaken by the Department of Primary Industry, Water and Environment (DPIWE) for analysis of sediment composition, metal contamination levels and organic carbon content. In the Huon a further 25 infaunal samples were collected from sites selected to give a broad overview of the ecology of the system. Sediment samples were also collected from the Huon for sediment particle size analysis, and evaluation of metal levels and organic carbon content. NHT/NAP Final Report – Page 1 Biological status of the Derwent and Huon Estuaries The results of this study found that there were similarities in the pattern of community distribution along the estuaries. In neither system were there any areas where fauna was completely absent, in fact diversity was high throughout most of the sample sites. The faunal community in both estuaries was most strongly related to the natural geomorphology and salinity gradient of the estuaries, and in turn to the depositional character of the system and the organic content. Changes throughout the estuaries were gradual but several discrete communities were identified within each estuary and the species which most strongly characterised these communities are described. The community distribution in the Derwent was slightly more complex than the Huon, as in addition to the natural gradient there were also multiple anthropogenic gradients. Prior to this study it was anticipated that the extremely high concentrations of metals throughout the Derwent would be the most significant structuring influence on the ecology of the system. However, the results show that metal contamination was not the overriding determinant of benthic infaunal community composition, although both organic enrichment and metal contamination had a significant influence on the community structure in localised areas. Contrary to our expectations, areas with very high metal concentrations, including areas containing toxic metals (i.e. mercury and arsenic), had an abundant fauna which suggests that somehow these metals were not biologically available. This raises an interesting question regarding how the infauna avoid this toxicity. The metals may be chemically bound in the sediments or perhaps the infauna are actively circumventing any toxic effects by avoiding, compartmentalising or excreting the metals. If the toxicity is managed through biochemical stabilisation of the sediments then any changes in the sediment chemistry of the estuary could have a serious and detrimental effect. On the other hand if the toxicants are being stabilised within the animals then this represents a significant bioaccumulation risk through the food chain. This study shows that the Huon is a relevant and valuable biological reference point for comparison with the Derwent and consequently can provide useful parameters for developing management guidelines for both the Derwent and Huon. The biological information provides an important resource for researchers and managers. It represents a baseline ecological reference for any future assessment of sediment condition and ecological status. The study defines species indicative of communities characterising particular regions within the system. These biological zonation patterns will enable environmental managers to locate biologically relevant monitoring sites and to evaluate improvements and deterioration in the estuarine condition both spatially and temporally. Invasive species are considered to be one of the most significant threats to global biodiversity. Prior to this study it was well known that there were several key introduced species in the Derwent, particularly around the port of Hobart, but the distribution of species throughout the rest of the system or in the Huon estuary was largely unknown. This study mapped the current status of invasive species in both estuaries providing a point of reference to monitor and manage their spread and distribution. Examination of the environmental preferences of these species suggests that in general their environmental tolerances are broad and that range extension is more likely to result from opportunity and reduction in competitive pressure rather than any particular environmental preference. This has significant implications for the management of these ecologically and potentially economically important species. NHT/NAP Final Report - Page 2 Biological status of the Derwent and Huon Estuaries Although this study was specifically focussed on the Derwent and Huon estuaries, the findings can be applied in a much broader spatial context. Comparison of the faunal information for the lower estuary regions with other local studies suggests that the community characterisation would be applicable to other estuaries in south-eastern Tasmania. The general response of the main species and infaunal community groups to metal contamination could potentially be applicable throughout southern temperate Australia, whilst the functional community response and invasive species information has even wider application. NHT/NAP Final Report – Page 3 Biological status of the Derwent and Huon Estuaries Table of Contents EXECUTIVE SUMMARY.......................................................................................................................1 1. INTRODUCTION .............................................................................................................5 1.1 BACKGROUND ......................................................................................................................5
Load more

Recommended publications
  • MICROCLIMATIC ASPECTS of RETREAT SITE and BASKING SITE SELECTION by the TASMANIAN TIGER SNAKE, Notechis Ater Sp
    MICROCLIMATIC ASPECTS OF RETREAT SITE AND BASKING SITE SELECTION BY THE TASMANIAN TIGER SNAKE, Notechis ater sp. (Serpentes: Elapidae). PATRICK BRIAN WHITAKER Submitted in Partial Fulfilment of the Requirements for the Degree of Bachelor of Science with Honours ----- Department of Geography and Environmental Studies University of Tasmania Hobart 1992 This thesis is dedicated to those who, in the future, may wish to use the information therein for the benefit of the snake. Abstract The thermal ecologies of two elevationally isolated populations of adult female Tasmanian Tiger Snakes (Notechis ater sp.) were investigated using stomach implanted radiotelemetry and a comprehensive microclimate monitoring programme. The study sites were Egg Islands, in the Huon Valley in southeastern Tasmania, and at Lake Crescent, on the lower Western Central Plateau of Tasmania. The study had four primary ~ims: (i) to determine the microclimatic conditions associated with retreat site and basking site selection; (ii) to record and compare behavioural thermoregulatory response to micrometeorological variation; (iii) to monitor diel rhythmicity and range of body temperatures; (iv) to determine voluntary thermal limits and eccritic body temperatures. This information was used in two ways: firstly, to identify the preferred physical microhabitat of this species; and secondly, to develop two predictive models of adult female Tiger Snake activity. The first is a relatively simple empirical model based on microclimatic correlates of body temperature; the second, a biophysical approach involving analysis of the snake's energy budget. Development of the first model required identification of those environmental parameters and quantities which: (i) trigger emergence; (ii) determine the amount of time necessary for the daily warm-up phase in differing micrometeorological conditions; (iii) allow the animal to move about within its home-range; and (iv) trigger entry into retreat sites.
    [Show full text]
  • Newsletter for the Huon Valley Environment Centre Winter/Spring
    HAVOC Newsletter for the Huon Valley Environment Centre Winter/Spring Edition HVEC is a non-profit, volunteer organisation with a vision, for the people of the world to experience in the Huon Valley a community committed to living harmoniously with their natural environment. Committee Members Convenor: Adam Burling Treasurer: Jenny Weber Secretary: Loki Maxwell Education: Rob Sheehan Centre Co-ordination: Jamie Ward Fundraising: Daynu Other Key Positions Public Officer: Lilian Komzak Membership Co-ordinators: Karen & Chris ([email protected]) Volunteer Co-ordinator: Aviva Hannah Librarian: Robyn Von Bernburg Retail Manager: Shar Molloy HAVOC is published several times a year and is designed and edited by Melanie Simon; contributions of relevant articles and images or artwork from members are welcomed. All material for this newsletter is donated and HVEC do not take responsibility for the opinions expressed herein. HUON VALLEY ENVIRONMENT CENTRE INC. 3/17 Wilmot Rd, P.O. Box 217 HUONVILLE, 7109 Phone: 03 6264 1286 Fax: 03 6264 1243 Email: [email protected] Website: www.huon.org Dear HVEC member, You are invited to attend the opening of ‘weld echo’, presented by the Black Sassy Collective, at the Riverside Pavilion, Mawson’s place, Hobart, on Friday the 2nd of September 2005 @ 6pm. Official opening will be by Bob Brown who will introduce you to glimpses of an endangered valley, a collaborative exhibition of Weld inspired art. Then on Sunday the 11th of September, come to an auction of the art at Sirens (Victoria St, Hobart) at 4.30pm. There will be entertainment by the Stiff Gins. Entry $5, proceeds to the Weld Valley Campaign, for more info go to www.huon.org.
    [Show full text]
  • Necklace Making and Placedness in Tasmania 1 Introduction
    Coolabah, No.11, 2013, ISSN 1988-5946, Observatori: Centre d’Estudis Australians, Australian Studies Centre, Universitat de Barcelona Necklace making and placedness in Tasmania 1 Ray Norman Copyright©2013 Ray Norman. This text may be archived and redistributed both in electronic form and in hard copy, provided that the author and journal are properly cited and no fee is charged. Abstract: This paper has been written against the backdrop of John B. Hawkins’ paper, A Suggested History of Tasmanian Aboriginal Kangaroo Skin or Sinew, Human Bone, Shell, Feather, Apple Seed & Wombat Necklaces, published in Australiana, November 2008, and the research it sparked. Hawkins proffered some contentious propositions concerning unlikely and speculative connections between Tasmanian Aboriginal shell necklace making and the making of so-called “Tasmanian Appleseed necklaces”. Within the acknowledgements section of his paper Hawkins said that he “[looked] forward to a response to [his] article by the museum authorities, for it is only by the cut and thrust of debate that knowledge can be further enhanced”. This paper takes up that challenge albeit from outside the Tasmanian Museum and Art Gallery and totally independent of any institutional sponsorship. Introduction Cultural production is at the nexus of different understandings of place and the cultural realities that belong there. It turns out that necklace making in Tasmania has a resonance of a kind that might not be easily found elsewhere because of the complex relationships it exemplifies between settler, and Indigenous trajectories. Like a thread these necklaces join both sides of the colonial equation in revealing, ambivalent and contested stories that resonate with the new globalism that is shaping the 21st Century 1 This paper is a contribution to the Placescape, placemaking, placemarking, placedness … geography and cultural production Special Issue of Coolabah, edited by Bill Boyd & Ray Norman.
    [Show full text]
  • Download Expression of Interest
    palawa lugganah –– Tasmania’s next great, multi-day holiday experience palawa lugganah — footmark of blackman palawa lugganah is an adventure through river, forest, coast and lagoon landscapes, travelling from town to town, meeting locals and enjoying regional food and hospitality. The track leads the traveller on a fascinating journey, immersing them in the natural world and Aboriginal culture that have jointly existed for 45,000 years. 1 palawa lugganah –– Tasmania’s next great, multi-day holiday experience Outline Palawa lugganah is a multi-use track that allows tourists to travel off road and immerse themselves in the natural Because cycle-touring and trail-running are environment. The track offers a increasingly popular, the track will be diversity of landscapes, from rural marketed for this burgeoning tourism demographic. Overnight bushwalking is scenery through river, forest, coast and well catered for in Tasmania: it brings low lagoons to the most southern beach in returns to local economies, and appeals to Australia. Each night travellers will a relatively-small and comparatively- enjoy the local food and hospitality of declining section of the population. By towns along the way. contrast, a smooth, rolling cycle track will be accessible to a wide range of abilities. Electric bikes will broaden the appeal for both kids and adults. This new track will palawa lugganah has strikingly beautiful deliver a constant stream of travellers to landscapes, rich cultural history, and small business in existing towns and bring connects with friendly local communities. strong returns to drive investment in the What makes it a unique and unforgettable local economy.
    [Show full text]
  • Great Australian Bight BP Oil Drilling Project
    Submission to Senate Inquiry: Great Australian Bight BP Oil Drilling Project: Potential Impacts on Matters of National Environmental Significance within Modelled Oil Spill Impact Areas (Summer and Winter 2A Model Scenarios) Prepared by Dr David Ellis (BSc Hons PhD; Ecologist, Environmental Consultant and Founder at Stepping Stones Ecological Services) March 27, 2016 Table of Contents Table of Contents ..................................................................................................... 2 Executive Summary ................................................................................................ 4 Summer Oil Spill Scenario Key Findings ................................................................. 5 Winter Oil Spill Scenario Key Findings ................................................................... 7 Threatened Species Conservation Status Summary ........................................... 8 International Migratory Bird Agreements ............................................................. 8 Introduction ............................................................................................................ 11 Methods .................................................................................................................... 12 Protected Matters Search Tool Database Search and Criteria for Oil-Spill Model Selection ............................................................................................................. 12 Criteria for Inclusion/Exclusion of Threatened, Migratory and Marine
    [Show full text]
  • Impact of Sea Level Rise on Coastal Natural Values in Tasmania
    Impact of sea level rise on coastal natural values in Tasmania JUNE 2016 Department of Primary Industries, Parks, Water and Environment Acknowledgements Thanks to the support we received in particular from Clarissa Murphy who gave six months as a volunteer in the first phase of the sea level rise risk assessment work. We also had considerable technical input from a range of people on various aspects of the work, including Hans and Annie Wapstra, Richard Schahinger, Tim Rudman, John Church, and Anni McCuaig. We acknowledge the hard work over a number of years from the Sea Level Rise Impacts Working Group: Oberon Carter, Louise Gilfedder, Felicity Faulkner, Lynne Sparrow (DPIPWE), Eric Woehler (BirdLife Tasmania) and Chris Sharples (University of Tasmania). This report was compiled by Oberon Carter, Felicity Faulkner, Louise Gilfedder and Peter Voller from the Natural Values Conservation Branch. Citation DPIPWE (2016) Impact of sea level rise on coastal natural values in Tasmania. Natural and Cultural Heritage Division, Department of Primary Industries, Parks, Water and Environment, Hobart. www.dpipwe.tas.gov.au ISBN: 978-1-74380-009-6 Cover View to Mount Cameron West by Oberon Carter. Pied Oystercatcher by Mick Brown. The Pied Oystercatcher is considered to have a very high exposure to sea level rise under both a national assessment and Tasmanian assessment. Its preferred habitat is mudflats, sandbanks and sandy ocean beaches, all vulnerable to inundation and erosion. Round-leaved Pigface (Disphyma australe) in flower in saltmarsh at Lauderdale by Iona Mitchell. Three saltmarsh communities are associated with the coastal zone and are considered at risk from sea level rise.
    [Show full text]
  • A Review of Natural Values Within the 2013 Extension to the Tasmanian Wilderness World Heritage Area
    A review of natural values within the 2013 extension to the Tasmanian Wilderness World Heritage Area Nature Conservation Report 2017/6 Department of Primary Industries, Parks, Water and Environment Hobart A review of natural values within the 2013 extension to the Tasmanian Wilderness World Heritage Area Jayne Balmer, Jason Bradbury, Karen Richards, Tim Rudman, Micah Visoiu, Shannon Troy and Naomi Lawrence. Department of Primary Industries, Parks, Water and Environment Nature Conservation Report 2017/6, September 2017 This report was prepared under the direction of the Department of Primary Industries, Parks, Water and Environment (World Heritage Program). Australian Government funds were contributed to the project through the World Heritage Area program. The views and opinions expressed in this report are those of the authors and do not necessarily reflect those of the Tasmanian or Australian Governments. ISSN 1441-0680 Copyright 2017 Crown in right of State of Tasmania Apart from fair dealing for the purposes of private study, research, criticism or review, as permitted under the Copyright act, no part may be reproduced by any means without permission from the Department of Primary Industries, Parks, Water and Environment. Published by Natural Values Conservation Branch Department of Primary Industries, Parks, Water and Environment GPO Box 44 Hobart, Tasmania, 7001 Front Cover Photograph of Eucalyptus regnans tall forest in the Styx Valley: Rob Blakers Cite as: Balmer, J., Bradbury, J., Richards, K., Rudman, T., Visoiu, M., Troy, S. and Lawrence, N. 2017. A review of natural values within the 2013 extension to the Tasmanian Wilderness World Heritage Area. Nature Conservation Report 2017/6, Department of Primary Industries, Parks, Water and Environment, Hobart.
    [Show full text]
  • 3966 Tour Op 4Col
    The Tasmanian Advantage natural and cultural features of Tasmania a resource manual aimed at developing knowledge and interpretive skills specific to Tasmania Contents 1 INTRODUCTION The aim of the manual Notesheets & how to use them Interpretation tips & useful references Minimal impact tourism 2 TASMANIA IN BRIEF Location Size Climate Population National parks Tasmania’s Wilderness World Heritage Area (WHA) Marine reserves Regional Forest Agreement (RFA) 4 INTERPRETATION AND TIPS Background What is interpretation? What is the aim of your operation? Principles of interpretation Planning to interpret Conducting your tour Research your content Manage the potential risks Evaluate your tour Commercial operators information 5 NATURAL ADVANTAGE Antarctic connection Geodiversity Marine environment Plant communities Threatened fauna species Mammals Birds Reptiles Freshwater fishes Invertebrates Fire Threats 6 HERITAGE Tasmanian Aboriginal heritage European history Convicts Whaling Pining Mining Coastal fishing Inland fishing History of the parks service History of forestry History of hydro electric power Gordon below Franklin dam controversy 6 WHAT AND WHERE: EAST & NORTHEAST National parks Reserved areas Great short walks Tasmanian trail Snippets of history What’s in a name? 7 WHAT AND WHERE: SOUTH & CENTRAL PLATEAU 8 WHAT AND WHERE: WEST & NORTHWEST 9 REFERENCES Useful references List of notesheets 10 NOTESHEETS: FAUNA Wildlife, Living with wildlife, Caring for nature, Threatened species, Threats 11 NOTESHEETS: PARKS & PLACES Parks & places,
    [Show full text]
  • Black and White Children in Welfare in New South Wales and Tasmania, 1880-1940
    ‘Such a Longing’ Black and white children in welfare in New South Wales and Tasmania, 1880-1940 Naomi Parry PhD August 2007 THE UNIVERSITY OF NEW SOUTH WALES Thesis/Dissertation Sheet Surname or Family name: Parry First name: Naomi Abbreviation for degree as given in the University calendar: PhD School: History Faculty: Arts and Social Sciences Title: ‘Such a longing’: Black and white children in welfare in New South Wales and Tasmania, 1880-1940 Abstract 350 words maximum: When the Human Rights and Equal Opportunities Commission tabled Bringing them home, its report into the separation of indigenous children from their families, it was criticised for failing to consider Indigenous child welfare within the context of contemporary standards. Non-Indigenous people who had experienced out-of-home care also questioned why their stories were not recognised. This thesis addresses those concerns, examining the origins and history of the welfare systems of NSW and Tasmania between 1880 and 1940. Tasmania, which had no specific policies on race or Indigenous children, provides fruitful ground for comparison with NSW, which had separate welfare systems for children defined as Indigenous and non-Indigenous. This thesis draws on the records of these systems to examine the gaps between ideology and policy and practice. The development of welfare systems was uneven, but there are clear trends. In the years 1880 to 1940 non-Indigenous welfare systems placed their faith in boarding-out (fostering) as the most humane method of caring for neglected and destitute children, although institutions and juvenile apprenticeship were never supplanted by fostering. Concepts of child welfare shifted from charity to welfare; that is, from simple removal to social interventions that would assist children's reform.
    [Show full text]
  • Memoirs of Hydrography
    MEMOIRS OF HYDROGRAPHY INCLUDING B rief Biographies o f the Principal Officers who have Served in H.M. NAVAL SURVEYING SERVICE BETWEEN THE YEARS 17 5 0 and 1885 COMPILED BY COMMANDER L. S. DAWSON, R.N. i i nsr TWO PARTS. P a r t I .— 1 7 5 0 t o 1 8 3 0 . EASTBOURNE : HENRY W. KEAY, THE “ IMPERIAL LIBRARY.” THE NEW YORK PUBLIC LIBRARY 8251.70 A ASTOR, LENOX AND TILDEN FOUNDATIONS R 1936 L Digitized by PRE F A CE. ♦ N gathering together, and publishing, brief memoirs of the numerous maritime surveyors of all countries, but chiefly of Great Britain, whose labours, extending over upwards of a century, have contributed the I means or constructing the charted portion óf the world, the author claims no originality. The task has been one of research, compilation, and abridgment, of a pleasant nature, undertaken during leisure evenings, after official hours spent in duties and undertakings of a kindred description. Numerous authorities have been consulted, and in some important instances, freely borrowed from ; amongst which, may be mentioned, former numbers of the Nautical Magazine, the Journals of the Royal Geographical Society, published accounts of voyages, personal memoirs, hydrographic works, the Naval Chronicle, Marshall, and O'Bymes Naval Biographies, &c. The object aimed at has been, to produce in a condensed form, a work, useful for hydrographic reference, and sufficiently matter of fact, for any amongst the naval surveyors of the past, who may care to take it up, for reference—and at the same time,—to handle dry dates and figures, in such a way, as to render such matter, sufficiently light and entertaining, for the present and rising generation of naval officers, who, possessing a taste for similar labours to those enumerated, may elect a hydrographic career.
    [Show full text]
  • Bass Braddon Franklin Lyons
    KING FLINDERS ISLAND ISLAND KING TASMANIAN HOUSE OF ASSEMBLY DIVISIONS ISLAND Boundaries set out in the Constitution Amendment (House of Assembly Electoral boundaries) Act 2018 BASS Currie and effective 28 September 2018. FLINDERS BRADDON Whitemark Grassy Lady Barron truwanna / CAPE BARREN ISLAND 0 50km Cape Grim Circular Head Cape Portland Stanley Port Latta SMITHTON Marrawah Boat Harbour West Point Gladstone WYNYARD Eddystone Point Somerset Bellingham Bridport BURNIE DEVONPORT DORSET Heybridge Greens Beach Penguin GEORGE TOWN GEORGE CIRCULAR HEAD Ridgley DEVONPORT Derby Port Scottsdale ULVERSTONE TOWN Sorell Nabowla BURNIE Riana Beaconsfield Lebrina WEST Ringarooma LATROBE TAMAR Lilydale Sprent LATROBE Exeter BASS CENTRAL Railton Dilston ST HELENS WARATAH/ Frankford LAUNCESTON COAST Sheffield Legana WYNYARD Nunamara Sandy Cape Waratah KENTISH LAUNCESTON BREAK O’DAY Scamander Hadspen Savage River DELORAINE Westbury Perth Blessington Mole Creek Evandale Cradle St Marys Valley MEANDER VALLEY Longford Bracknell Fingal Corinna Cressy BRADDON Breona Poatina Avoca Rosebery NORTHERN MIDLANDS Bicheno ZEEHAN Campbell Town WEST COAST LYONS Miena Ross QUEENSTOWN Derwent CENTRAL HIGHLANDS Swansea Coles Bay Strahan Bridge Interlaken Cape Sorell Tarraleah Oatlands Bothwell SOUTHERN MIDLANDS GLAMORGAN- SPRING BAY Melton Mowbray Tunnack Ouse Triabunna Kempton Colebrook Orford Hamilton Buckland Fentonbury Broadmarsh Campania Westerway Bushy Park MARIA Nugent ISLAND Maydena BRIDGEWATER Richmond Strathgordon SORELL DERWENT VALLEY NEW NORFOLK SORELL GLENORCHY
    [Show full text]
  • Geology of the Maydena, Skeleton, Nevada, Weld and Picton 1:25 000 Scale Map Sheets
    Mineral Resources Tasmania Tasmanian Geological Survey Tasmania DEPARTMENT of INFRASTRUCTURE, Record 2006/04 ENERGY and RESOURCES Geology of the Maydena, Skeleton, Nevada, Weld and Picton 1:25 000 scale map sheets by C. R. Calver, S. M. Forsyth and J. L. Everard CONTENTS General remarks …………………………………………………………………………………………… 5 Parmeener Supergroup mapping (Maydena, Skeleton, Nevada map sheets) …………………………………… 6 Vegetation ……………………………………………………………………………………………… 7 Physiography ……………………………………………………………………………………………… 9 Fold structure province ………………………………………………………………………………… 9 Fault structure province ………………………………………………………………………………… 9 Acknowledgements ………………………………………………………………………………………… 12 STRATIGRAPHY ………………………………………………………………………………………… 13 Proterozoic sedimentary rocks ……………………………………………………………………………… 13 Harrisons Opening Formation (Weld, Picton map sheets)…………………………………………………… 13 Turbiditic lithic sandstone, conglomerate and black phyllite (Phc) …………………………………………… 13 Black slate and phyllite with minor quartzwacke and diamictite (Php) ………………………………………… 13 Clark Group …………………………………………………………………………………………… 16 Clark Group correlate, Jubilee Range area (Skeleton, Nevada map sheets) ……………………………………… 16 Needles Quartzite correlate ……………………………………………………………………… 16 Humboldt Formation correlate …………………………………………………………………… 16 Clark Group correlate, Snake River Valley (Nevada map sheet) ……………………………………………… 19 Clark Group correlate, Gallagher Plateau area (Weld map sheet) ……………………………………………… 19 Orthoquartzite (Pcq) ……………………………………………………………………………… 19 Dolomitic mudstone and
    [Show full text]