News and Events

Ancient Britons were the earliest North Europeans

Dr Peter Hoare, Honorary Associate from the School of Geosciences and colleague of Dr Stephen Gale is part of a team of international scientists which has uncovered archaeological remains in Britain which have revolutionised our knowledge of the first known settlement in northern Europe.

Read the full news story here

Dr Jody Webster and colleagues succeed in submersible dive program proposal

23/7/2010

Dr Jody Webster and his colleagues have been succesful in their proposal to NOAA (National Oceanic and Atmospheric Administration) to conduct a submersible dive program in the Northwestern Hawaiian Islands as part of the Hawaii Undersea Research Laboratory.
The proposal is titled 'Evidence for Miocene and Younger Glacial/Deglacial Climate Variability from Drowned Coral Reefs around Gardner Pinnacles' and the aim of the dive program is to recover evidence from drowned coral reefs that may shed light on the behaviour of coral reefs during periods of climate instability.
The dive program will be undertaken on submersible vehicles like Pisces IV, pictured with Dr Webster below.

Dr Jody Webster and the Pisces IV submarine

Dr Jody Webster and his team unlock groundbreaking climate change secrets from the Great Barrier Reef

20/7/2010

Dr Jody Webster, co-chief scientist on the recent IODP scientific voyage to the Great Barrier Reef in northern Australia, and his team have begun the exciting work of analysing the cores that were taken during the voyage earlier this year.

Although in its early stages, this groundbreaking research has already uncovered some excellent results; Dr Webster says “Initial observations of the cores confirm the presence of the shallow fossil reef biota needed to construct a new and robust sea level curve”.
“The expedition has provided us with a truly unique opportunity to test ecologic theories about coral reef resilience and the vulnerability of the Great Barrier Reef to future climate change.”

The cores taken from the field site are currently being analysed at the IODP Bremen Core Repository by the wider IODP team, which has been the subject of media coverage in Germany. Read the Weserkurier article in full

Read the media release in full
See here for more information on the voyage

:: Update ::
The research of Dr Webster and his team has attracted considerable media attention. Please follow the following links to various pieces of media:

Read full news story featured on ABC news, Tropical North blog

Listen to an interview on ABC Radio Southern Queensland

Watch news story (aired in Germany 20/7/2010)

Read the front page Cairns Bulletin article


Stay tuned for more updates on this revolutionary research as more will be added in coming days.

Sydney geographers excel at Christchurch NZGS/IAG

13/7/2010

Geographers from The University of Sydney performed very well at the New Zealand Geographical Society/Institute of Australian Geographers (NZGS/IAG) joint conference in Christchurch from 5-8 July.

Presentations by Jo Gillespie, Raewyn Graham, Fiona McKenzie, Phil McManus (twice) and Laurence Troy all received positive responses. Raewyn Graham and Paul Smith, who is commencing his PhD with Phil McManus, chaired sessions of the conference. PhD students were also active in the post-graduate student workshop, which was attended by over fifty students from Australia and New Zealand. Geographers based in Urban and Regional Planning at The University of Sydney (Krishna Shrestha, Therese Kenna and PhD student Emily Hunter) were likewise active in presenting and chairing sessions.

At the conference Phil McManus became Vice President/President Elect of the IAG. This six year commitment involves two years as Vice-President, two years as President and two years as Vice President/Past President. "It's a great model for mentoring, developing new leadership and ensuring continuity within an organisation," said Phil.

With nearly 500 members across Australia and overseas, the IAG is an important organisation representing geography, encouraging the development of young geographers and representing the interests of geographers on a range of matters. "It is pleasing to see new members joining the IAG, including PhD students from The University of Sydney," Phil said. "IAG membership is at record levels and I am looking forward to Sydney academic staff and students being involved in future IAG conferences at Wollongong in 2011 and Macquarie University in 2012".

Exploring the mysteries of south-eastern Australia's seafloor

9/7/2010

A/Prof Jock Keene, a School of Geosciences honorary associate has given a very interesting and entertaining interview on ABC Radio. He spoke about his work mapping previously unmapped areas of the coast off south-eastern Australia aboard the Southern Surveyor. The interview is well worth a listen to, and the accompanying images are also very spectacular.

Listen to the full interview and see the images here

Postgraduate Achievements

6/6/2010

Congratulations to Mattijs Smits who has been awarded the Postgraduate Research Prize for Outstanding Achievement for Geosciences in 2010.

The award from the Faculty of Science goes to a postgrad who is within 3 years of commencing their PhD or MSc at Sydney and who demonstrates significant outreach activities and is a senior author on a paper in a high-quality journal that was accepted within 24 months of starting their candidature. Mattijs' 2010 paper with S.R. Bush "A light left in the dark: The practice and politics of pico-hydropower in the Lao PDR" in the Elsevier journal Energy Policy nicely fits the bill.

Congratulations also to Nathan Wales who has been awarded the Annual Association of Pacific Rim Universities Doctoral Students Conference Scholarship for 2010.

The 11th Annual Association of Pacific Rim Universities Doctoral Students Conference will take place July 12 to 16, 2010 at the Universitas Indonesia

Highlighting the health of our harbour system

4/6/2010

The School of Geosciences' A/Prof Gavin Birch and Serena Lee (PhD candidate) last night appeared on Catalyst, the popular science show screened on the ABC network.

Gavin and Serena spoke about their work in researching the previously little known effects of toxic stormwater runoff and its accumulation in sediments and how this impacts on the health of Sydney Harbour and its marine life.

The multi-disciplinary nature of this story also highlights the great value of the collaborative research being undertaken at SIMS (the Sydney Institute of Marine Science). The School of Geosciences is proud to be playing such a crucial role in the research undertaken at SIMS and to be at the forefront of Australian marine science research in general.

Congratulations to Gavin and Serena for an interesting and very informative presentation of their work.

Watch the segment

A/Prof Bill Pritchard to co-convene international human security and climate change conference

3/6/2010

Associate Professor Bill Pritchard and Associate Professor Phil McManus from the School of Geosciences will shortly be travelling to India where A/Prof Pritchard will co-convene an international workshop entitled “Enhancing human security in the context of climate change: Contributions from Indian and Australian social scientists”.

"This Workshop...has the aim to seeking to develop longer-term collaborative capacities to investigate these issues, both in India and Australia. By getting to know each other’s work, new questions are raised, and new possibilities are opened."
More information (pdf)

A/Prof Bill Pritchard and A/Prof Phil McManus

Pictured above: Associate Professor Bill Pritchard and Associate Professor Phil McManus and colleague in India at the “Enhancing human security in the context of climate change: Contributions from Indian and Australian social scientists” conference which was co-convened by A/Prof Pritchard.

Expressions of interest for the 2011 Southeast Asia Field School are now due

28/5/2010

Initial expressions of interest for the Southeast Asia Field School to Indonesia in January 2011 are now due. Don’t miss this unique opportunity to learn first-hand about development geography in practice, while experiencing overseas travel and earning credit towards your degree at the same time!

To submit an expression of interest, contact or click here to find out more.

Geosciences research recognised for its impact

10/5/2010

The Federal Government Department of Innovation, Industry, Science and Research (DIISR) has released the Australian Innovation System Report 2010. One of the most interesting aspects of the report is the assessment of the relative impacts of Australian scientific publications in the period 2004-2008 (see figure below). Not surprisingly, this index (which is a measure of ISI citations per publication) places Geosciences second, followingly closely behind Physics. Environmental Science also ranks very highly.
For those involved in research in the fields of Geosciences and Environmental Science it may not come as a surprise to see these areas doing so well but it is gratifying to see this quantified and recognised.

Relative impacts of Australian scientific publications

Geo.talks 2010: Dan Penny and Eleanor Bruce on 10 years of cross-disciplinary research at Angkor, Cambodia

7/5/2010

The first in the 2010 geo.talks series will be held from 12-1pm on Thursday 13th May in the Madsen conference room, 449. Come along to hear Dr Dan Penny and Dr Eleanor Bruce reflect on ten years of the University's involvement in cross-disciplinary research at Angkor, Cambodia.

“Geoscience’s engagement in a decade of cross-disciplinary research at the World Heritage site of Angkor, Cambodia.”
Last year marked a decade of the University of Sydney’s groundbreaking interdisciplinary research at Angkor. Angkor was the capital of the sprawling Khmer empire, from the 9th the 15th century CE, and is now the world’s largest archaeological site and the Asia-Pacific’s flagship World Heritage property. The University of Sydney and its partner institutions, generously supported by the Australian Research Council, have redefined the site and its significance, bringing it into contemporary debates surrounding (inter alia) sustainability and climate change, and provided tangible outcomes to assist with the ongoing management of the site. Dan Penny and Eleanor Bruce, co-Directors of the ‘Greater Angkor Project’ and the ‘Living with Heritage Project’, respectively, will overview some of the principal outcomes of this research, and will reflect on the contribution the School of Geosciences has made to the University’s burgeoning engagement with Cambodia.

A/Prof Bill Pritchard to discuss food security based on his experiences in rural India

21/4/2010

Due to unforseen circumstances this event has been postponed. Details on rescheduling will be circulated when finalised.

The next University of Sydney South Asia Research Network forum will be presented by:

Associate Professor Bill Pritchard, who will be discussing “Institutions for Food Security: Global Insights from Rural India”.

The recent Global Food Crisis raises major questions about the how the contemporary international politics of agriculture intersects with food security aspirations for the world’s poor. Associate Professor Pritchard’s presentation will address these issues in the context of rural India. It will provide an outline of impending research into these issues, which is being funded through the Australian Research Council’s Discovery Projects scheme.
Bill Pritchard is Associate Professor in Economic Geography in the School of Geosciences.

Location: The Refectory, Main Quadrangle (The Refectory in the Arts Faculty corner of the Quadrangle and down the stairs).
Time and Date: Due to unforseen circumstances this event has been postponed. Details on rescheduling will be circulated when finalised.

All are warmly invited to attend this forum and refreshments will be provided.

Please RSVP to . Please indicate you are sending your RSVP to this event in your email subject-line.

Rocky Mountains puzzle solved

29/3/2010

The School of Geosciences' Dr. Maria Seton and Professor Dietmar Müller have solved the mystery of the formation of the Rocky Mountains in North America.
For many years the mechanism of formation of this impressive mountain range has been debated but now, using cutting edge computer modelling along with seismic imaging techniques, Dr Seton and Prof Müller have, with colleagues from CalTech, published a solution to this mystery.
In a paper to be published in the April edition of Nature Geoscience Seton and Müller propose that the subduction of two separate oceanic plateaus under the continental plateau on the west coast of North America caused the formation of the mountain range much further inland than would normally be expected.
Congratulations to Dr Seton and Prof Müller for their contribution toward solving this trans-Pacific mystery.

Read the full article here
University press release

Castle Mountain

Above:
Castle Mountain showing ancient layers of sediments deposited in a shallow sea that were uplifted and now form the Rocky Mountains.
Photo courtesy R. Dietmar Müller

Earthscan publishes new book based on Geosciences PhD

26/3/2010

Daniel Robinson, PhD alumnus of the School of Geosciences supervised by Professor Philip Hirsch and Dr Bob Fisher, has turned his PhD into an pathbreaking new book published by Earthscan.

Confronting Biopiracy
Challenges, Cases and International Debates By Daniel F. Robinson

'Daniel Robinson's timely and authoritative book will inform the contemporary, but until now unproductive, discussions in WIPO and the WTO about ways in which spurious intellectual property claims over biological resources and traditional knowledge can be sanctioned as 'biopiracy'.'
Michael Blakeney, Herchel Smith Professor of Intellectual Property, Queen Mary, University of London, UK

Details of the book can be seen here.

Dr Robinson now lectures in environmental studies at the University of New South Wales.

The School of Geosciences and the University of Sydney Institute of Marine Science host eminent scientists at Integrated Ocean Drilling Program meeting

22/3/2010

In 2009 The University of Sydney won the right to host the highly significant Scientific Planning Committee meeting (SPC) for the IODP (Integrated Ocean Drilling Program) for the first time in the 30 years of this global program. The School of Geosciences and the University of Sydney Institute of Marine Science (USIMS) are currently jointly hosting the meeting which will run from 22nd March until 27th March 2010.
The meeting is being attended by more than 50 pre-eminent scientists from across the US, Europe, South East Asia and Australia.
The IODP is a globally significant scientific research organisation that operates three large ocean vessels which are used to investigate global tectonic and climate histories using deep sea drilling.
The University of Sydney is directly involved in this research program through an ARC LIEF bid and an ARC Discovery grant that was awarded to Dr Jody Webster to support post cruise science on an expedition to the Great Barrier Reef that is currently being undertaken.

Further information about the IODP program
Further information about the current Great Barrier Reef expedition

EarthByte Group models separation of Australia and New Zealand

21/03/2010

A/Prof Patrice Rey and Prof Dietmar Müller have today had a letter published in Nature Geoscience which presents a model for the separation of New Zealand from the Australian continent. This model is especially pertinent as the forces which led to the separation of New Zealand from Australia have also been observed to be currently active on the west coast of South America. The model presented by A/Prof Rey and Prof Müller was constructed using the state of the art GPlates software developed by the EarthByte Group and the Ellipsis program, which was developed in conjunction with Monash University and APAC (Australian Partnership for Advanced Computing).

Full article in Nature Geoscience
ABC Science article
University press release

This images shows the advanced stage of the thermal-mechanical modelling.

The above images shows the advanced stage of the thermal-mechanical modelling which was created using the GPlates and Ellipsis programs.

Update - 29/03/2010
A/Prof Patrice Rey and Prof Dietmar Müller's work was featured on the ABC Radio program 'AM with Tony Eastley' this morning.
Listen to the audio and read the transcript
The University is also featuring this groundbreaking research in its latest news section.

Geosciences in the media

Summer 2009/2010

The Summer period has been a busy one for the School with many staff featuring in various forms of national media. This type of media coverage maintains the Schools’ presence in the public mind and shows that the work done here is not only scientifically significant but that it is also relevant to wider society.

  • Dr Jody Webster was interviewed on ABC radio regarding his upcoming expedition to the Great Barrier Reef as the co-chief scientist in the International Ocean Drilling Program (IODP). The IODP team, which features scientists from 9 countries, hopes to use the coral cores obtained on this expedition to determine how the modern Great Barrier Reef will respond to any future changes in ocean conditions.
    Download the transcript and audio of the interviews here and here
  • Prof Geoff Clarke provided comment on the science behind the recent Haiti earthquakes. Geoff’s comments were picked up by media nationwide.
    Read the Sydney Morning Herald article
    Read the ABC News article
  • Prof Phil Hirsch was interviewed on ABC Radio National’s Late Night Live program. As Director of the Australian Mekong Resource Centre Phil gave a great interview focusing on the threat that climate change is posing to the Mekong Delta region.
    Download the audio of the interview
  • Fiona McKenzie, a PhD candidate at the School of Geosciences, featured on the ABC radio’s Science Show in her capacity as policy advisor for the Terrestrial Carbon Group. Fiona spoke about the decline of birds in Victorian rainforests.
    Download the audio of the interview

Bruce Thom and Andy Short honoured in Australia Day list

28/1/2010

The School of Geosciences is proud to congratulate Bruce Thom and Andy Short who have both received honours in the Australia Day list. Bruce Thom was awarded the Member of the Order of Australia (AM) and Andy Short was awarded the Medal of the Order of Australia (OAM)

Honourary Professor Bruce Thom (AM) received recognition for service to the environment as an adviser and advocate for the ecological management of the coastal zone, as a contributor to public debate on natural resource policy, and to the academic and professional discipline of geography.

Professor Andy Short (OAM) was recognised for service to science in the area of coastal studies, and to the Australian Beach Safety and Management Program.

It is great to see two such outstanding scientists recognised for their valuable contributions to the nation.

Australian Mekong Resource Centre launches new website

9/12/2009

The Australian Mekong Resource Centre (AMRC) in the School of Geosciences has a new look website. The website has been designed to fit in with the University's Content Management System (CMS). On the new website you will find information about AMRC projects, staff, students and much more.

Please click here to view the new website

Olivia Dun and Kevin Davies awarded Endeavour Research Fellowships

11/11/2009

Congratualtions to Olivia Dun and Kevin Davies who have both been awarded a 6 month Endeavour Research Fellowship. Both Fellowships are worth $23,500.

Olivia is a PhD candidate at the School of Geosciences and her work focuses on the role of the environment in forcing people to migrate and the level of protection, aid and assistance provided to such migrants, specifically in the Mekong Delta, Vietnam. Olivia will be carrying out her fieldwork in Vietnam.

Kevin is also a PhD candidate at the School of Geosciences. His research focuses on monitoring tropical forest change by remote sensing. Kevin will be undertaking his research in 2010 with the Royal University of Phnom Penh, Cambodia.

Congratulations Olivia and Kevin!

Area Studies Work Slate project - Geosciences staff and students have significant input

4/11/2009

Postgraduate students and staff of the School of Geosciences have had a significant input into the Vice-Chancellor's Review of Area Studies Work Slate project.

On 24 August, the University Provost Stephen Garton, who chaired the review panel, Institute of Social Sciences Director Professor David Goodman, and University of Sydney Director of Policy analysis and communication Tim Payne ran a consultation in the Madsen Building with 14 postgraduate geography students and three staff with primary research interests in Southeast Asia. A summary of that consultation is available here as a pdf.

The consultation resulted from an earlier submission to the Review made by the postgrads, based on a seminar discussion of issues in combining Area Studies and Discipline-oriented approaches to postgraduate work. The Area Studies Review Panel presented its final report on 23 October, and the report will be made public after the Vice Chancellor has presented his response and plan of action.

Associate Professor Peter Cowell responds to climate change report

28/10/2009

The School of Geosciences Acting Head of School, Associate Professor Peter Cowell, was interviewed for the ABC's 7:30 Report and Channel Nine News yesterday. He spoke about the implications of a report released on October 27 2009 by a federal parliamentary committee on the effect of climate change on Australia's coastline.
Peter's comments highlighted the value of the School's ongoing coastal research in a practical context.
The interviews aired on the 27th October.

Click here to view the full story or read the transcript from the ABC's 7:30 Report
Click here to view the full story from Channel Nine News

ARC Discovery Grant success

26/10/2009

The School of Geosciences is pleased to offer congratulations to Associate Professor Bill Pritchard, Dr Jody Webster and Dr Dan Penny, all of whom have been successful with recent ARC Discovery Grant applications.

Institutions for Food Security: Global Lessons from Rural India
A/Prof WN Pritchard; A/Prof JS Bandaralage; Dr A Rammohan; A/Prof M Sekher; Prof Dr S Parasuraman
Total grant amount $255 000 (2010-2013)

Integrated Ocean Drilling Program (IODP) drilling in the Great Barrier Reef: unlocking the causes, rates and consequences of abrupt sea level and climate change
Dr JM Webster; Dr HV McGregor; Dr SJ Fallon; Dr A Dutton; Dr AW Tudhope; Dr TM Esat; Dr Y Yokoyama
Total grant amount $372 000 (2010 - 2012)

Thresholds and hysteresis: how do abrupt changes in the Asian monsoon affect ecosystems and environmental processes?
Dr DA Penny; Dr BM Buckley; Dr Q Hua
Total grant amount $285 000 (2010 - 2012)

Dr Tom Hubble briefs press on recent Asia Pacific natural disasters


3/10/2009

The School continues to demonstrate its relevance to matters of interest to the community; thanks this time to Dr Tom Hubble.

Tom briefed several journalists about the Samoan and Sumatran earthquake/tsunami disasters and was quoted at length in The Australian newspaper by Asa Wahlquist and was interviewed by ABC News Radio's John Barron.

Click here to view the full article in The Australian.

Click here to listen to Tom's interview on ABC News Radio.

Professor John Connell awarded International Medal of the IAG

John Connell (centre) receives the International Medal of the IAG

1/10/2009

Professor John Connell has been awarded the International Medal of the Institute of Australian Geographers. He is only the fifth recipient of this prestigious award, which recognises the contribution of geographers in Australia and overseas to Australian geography in the international sphere. The award was bestowed at the IAG annual conference in Cairns 28-30 September 2009. The previous recipient of the IAG International Award was Harold Brookfield.

Book Launch: Viliam Phraxayavong's "History of Aid to Laos: motivations and impacts"

History of Aid to Laos by Viliam Phraxayavong

24/09/2009

Viliam Phraxayavong's comprehensive work "History of Aid to Laos: motivations and impacts" was launched last night by the Australian Mekong Resource Centre.
Viliam Phraxayavong was the director of international economic cooperation in the Royal Lao Government's Ministry of Economic Planning and Cooperation from 1964 to 1975 and is an alumnus of the School of Geosciences at the University of Sydney, having earned his PhD in 2007.
Viliam's book, "History of Aid to Laos: motivations and impacts" explores the situation of a country dependent on foreign aid for more than half a century and the ways in which donor nations have shaped Lao development and political relationships through the aid process.

After the launch, Viliam gave an interview to Sydney radio station 2SER. This interview can be downloaded as a free podcast (1.3Mb).

Anna Rose named Young Environmentalist of the Year

Anna Rose - Geosciences alumnus and Young Environmentalist of the Year

24/7/2009

Anna Rose (BA '05, LLB '08), alumnus of the School of Geosciences, has been awarded the Environment Minister's Young Environmentalist of the Year Award. Anna was nominated for her work with the Australian Youth Climate Coalition (AYCC) and she shares the award with fellow AYCC coordinators Ellen Sandell and Amanda McKenzie.
The conferring of the 2009 Young Environmentalist of the Year Award recognises Anna's extensive contributions to the field of climate change action and her success in garnering support for the cause. Anna's work with the AYCC seeks to educate and enable younger generations, both in Australia and overseas, to tackle the challenges of climate change head-on and to be a proactive force in overcoming these challenges.
As an alumnus of the School, and specifically of the Asia-Pacific Field School ('05), it is pleasing to see Anna working with her peers in such a practical way to address the global issue of climate change.
The School of Geosciences congratulates Anna on her excellent achievement and wishes her all the best in her future endeavours.

Read more about Anna here

Professor Dietmar Müller awarded inaugural Australian Laureate Fellowship

Professor Dietmar Müller receives the inaugural Australian Laureate Fellowship from Kim Carr.

22/6/09

15 inaugural Australian Laureate Fellowships were announced by the Minister for Innovation, Industry, Science and Research, Senator Kim Carr, on Monday, June 22. Each is worth around $2.7 million. One of three University of Sydney Laureate Fellows is Professor Dietmar Müller from the School of Geosciences.

Based on the Fellowship Professor Müller will create a Virtual Geological Observatory, exploiting the connection between deep earth and surface processes over the past 600 million years.

The observatory will enable the application of leading edge technologies to see into the Earth in four dimensions.

"This project will allow the unravelling of the driving forces of shifting coastlines and the formation of deep-Earth resources," said Professor Müller. "Open-source simulation and data-mining tools will be integrated with the observatory to explore associations between hydrocarbon and mineral deposits, and time-dependent plate boundary kinematics and dynamics," he said.

AMRC welcomes new postgraduate students

1/4/09

The Australian Mekong Resource Centre (AMRC) welcomes three new PhD students to the Centre and to the School of Geosciences. These students are Kim Sean Somatra from Cambodia, Oulavanh Keovilignavong from Laos and Worawan Sukraroek from Thailand. All three students won prestigious AusAID Australian Leadership Awards (ALA) to study at the School of Geosciences. Wora’s research is looking at Multi-stakeholder dialogue for negotiating livelihoods in the Mekong region: Is it a dream?. Her supervisor is Professor Philip Hirsch and her associate supervisor is Dr Mel Neave. Somatra’s research is looking at private dams in Cambodia and issues of water governance. His supervisor is Professor Philip Hirsch and his associate supervisor is Dr Mel Neave. Oulavanh is studying the Private Sector and Poverty Reduction in Laos: Analysis of Private Decision and Intervention in Poverty and Natural Resources. His supervisor and associate supervisor respectively are Professor Philip Hirsch and Associate Professor Bill Pritchard.

Pair to resolve the great opal debate

The Australian 14/1/09

Love it or or loathe it, high-quality opal – hydrated silicon dioxide – is regarded as Australia's own semi-precious stone.

But there are significant gaps in knowledge about what is a valuable commodity, supporting an industry worth up to $1 billion annually and producing 95 per cent of the world's commercial supply.

The big debate is about how it is formed, according to University of Sydney geoscientists Patrice Rey and Adriana Dutkiewicz.

Dr Rey became aware of this about three years ago. "The Lightning Ridge Miners Association invited me to go and look at the mines to see whether the syntectonic model (of formation) was correct," Dr Rey said. "I went there thinking there was no way that model can work, but it turned out this was exactly what happened (at Lightning Ridge)."

The syntectonic model holds that opal forms rapidly within sub-tectonic extensional fractures filled with hydrothermal fluids from deep within the earth's crust, super-saturated with silica.

The key, said Dr Rey, was that the pressure applied be sufficient to fracture the reservoir containing the viscous fluid, but not enough to breach the reservoir so that the fluid is lost.

The rival, much older theory, called the deep weathering model, holds that precious opal has been formed about 20m to 40m underground, when feldspars and clays mixed with surface water to produce a silica-saturated fluid trapped in open fractures and cavities above impermeable clay. When the water evaporated, precious opal was formed.

As Dr Rey realised after visiting the central northern NSW town, neither theory had been investigated properly, a situation that could be remedied now he and Dr Dutkiewicz have a $250,000, three-year Australian Research Council grant.

The pair are planning trips to Lightning Ridge and other opal sites such as those in South Australia in the Coober Pedy area, but they will be dealing with low-grade opal.

Click here for the full article.

This bus stop brought to you by prohibitionists

Sydney Morning Herald 13/1/09, article by Dr Kurt Iveson

The refusal to display atheist advertisements on public transport in Australia by the advertising company APN Outdoor is not the first time a billboard has ignited controversy, but it does reveal a troubling change for outdoor media.

Outdoor advertising is used by all sorts for many purposes, from governments and companies, to political groups, charities, musicians and people finding housemates and lost cats. It is more anarchic than other media. Some objects are designed to carry messages, such as street signs and billboards. But walls, power poles, building site hoardings and bus stops are frequently used in unintended and unsanctioned ways.

Even sanctioned forms can be hacked by different messages. In the 1970s and '80s the activist graffiti group BUGAUP made "adjustments" to cigarette billboards, asserting their "write of reply" to the tobacco companies. "Anyhow, have a Winfield" became "Anyhow, have a Wank, it's healthier!"

Its relatively open nature made it attractive to a variety of groups and messages. But increasingly, ownership and regulation of outdoor media space is concentrated in a small group of multinational companies.

The increasing concentration of ownership endangers the diversity of outdoor media. We may not want a free-for-all, but with the companies increasingly controlling access, we ought to be vigilant in scrutinising their content policies, as we are with other media companies. Urban authorities might welcome the provision of "free" urban infrastructure, but this should not destroy a vibrant and alternative outdoor media landscape.

Click here for the full article.

"Elders must ease Rosemeadow tension, say police"

The Australian 9/1/09

POLICE have called on the community elders of the troubled housing estate in Sydney's Rosemeadow to "take ownership" of the area's problems, as more arrests were made yesterday overthe wild street brawl in the southwestern suburb on Monday night.

With riot police preparing to patrol the impoverished enclave for the fourth straight night, local area commander for Campbelltown, Superintendent Stuart Smith, compared the violence in Rosemeadow to previous NSW public housing estate riots at Dubbo and Macquarie Fields in terms of the intensity of the violence and the nature of the affray. "The community needs to take ownership now. We are not the aggressors in this," Superintendent Smith said.

Kurt Iveson, senior lecturer in urban geography at the University of Sydney, said episodes of unrest in areas of concentrated public housing, including the 2005 riots at Macquarie Fields, were often wrongly followed by calls to demolish the estate.

"We find ourselves in the bizarre situation in which public housing is being demolished at the same time that we are experiencing an acute housing affordability crisis," he said.

Dr Iveson said design alone did not account for the difficulties faced by residents in some public housing estates, and the problem lay more with the fact that only the poorest of the poor and the terminally unemployed qualified for public housing.

"Demand for public housing is so acute that even families whose household income comes entirely from social security are not guaranteed access to public housing."

For the full article in The Australian, click here

Ancient Earth was a barren waterworld

New Scientist article 30/12/08

Dry land may be something of a novelty. Until around 2.5 billion years ago our planet was almost completely covered by water, a model of the early Earth suggests.

Today, some 28 per cent of Earth's surface is above sea level. Exactly how the ratio of land to sea has varied through Earth's history is unclear, but it is generally agreed that the amount of continental crust has increased over time.

Now, calculations by Nicolas Flament of the University of Sydney, Australia, and colleagues suggest that Earth was a water-world until about 2.5 billion years ago, with land making up only 2 to 3 per cent of its surface (Earth and Planetary Science Letters, DOI: 10.1016/j.epsl.2008.08.029).

Click here for the full article.

Graffiti talkback

18/12/08

Some call it art, some call it vandalism but whatever it is, graffiti is everywhere.

While local councils spend millions of dollars removing graffiti, others think of it as public art.

So is graffiti art or eyesore and is it okay on the wall of a factory but not on your newly painted front fence?

Kurt Iveson, Senior Lecturer from the School of Geosciences at the University of Sydney, recently participated in a discussion on the topic of grafitti, with ABC Radio National. You can download the audio podcast here.

Seafloor roughness in ocean systems

18/12/08

Dr Joanne Whittaker and Professor Dietmar Müller, from the School of Geosciences, and colleagues in France and USA, have found a previously unknown connection between the break-up of the ancient supercontinent Pangaea and the topography of the deep ocean floor. The research, published in the journal Nature on 18 December 2008, reveals for the first time how smooth flat expanses and rough hilly areas of ocean floor form. Ocean floors have remarkably contrasting topography: ship and satellite geophysical data reveal steep cliffs and valleys over vast areas, sometimes with elevations of over three kilometres, while other parts of the ocean floor are incredibly flat. "Seafloor roughness is really important in ocean systems as it influences the circulation and mixing of heat in the water," said Dr Joanne Whittaker, who completed the research as part of her PhD with Professor Dietmar Müller as her supervisor.

Marine gravity field representation of oceanic basement topography in the North Atlantic

The image above shows a marine gravity field representation of oceanic basement topography in the North Atlantic. The view angle is towards the northeast, with North America, Greenland and Iceland on the northwestern periphery and North Africa, Iberia, France, the UK and Ireland on the northeastern periphery. Note the relatively smooth, Jurassic oceanic basement on the lower left, offshore of the east coast of North America, and the increase in basement roughness towards the mid-ocean ridge in the middle of the image.

Whittaker et al.'s research suggests that this increase in ocean floor roughness through time is related to the breakup of supercontinent Pangaea.


Related EarthByte AuScope data set downloads

Sea-level rise ignored amid other factors

15/12/08

Australians could be being lulled into a false sense of security about climate change.

Dr Peter Cowell from Sydney University's Institute of Marine Science says Australians are unable to distinguish the impact of sea level rises from other factors affecting our coastlines such as storm erosion and natural loss of sand from one area to another.

These factors are masking the impact of sea level rises and will likely do so for the next fifty years until the impact of sea level rises becomes more significant and more apparent.

"The emerging impact of sea level rises now is being hidden in the 'noise' of other factors affecting change to our coastlines," says Dr Cowell who presented the research on sea level rises to the recent Climate Change Monitoring Symposium at Sydney University.

Click here for the full article.

Murray-Darling excursion

Picture of field trip

07/10/08

During the non-teaching week starting 29 September 2008, ten postgraduate students and staff from the Australian Mekong Resource Centre (AMRC) in the School of Geosciences went on an excursion to the Murray-Darling basin to study policy and field issues in Australian water reform. Participants included six Cambodian students, one Thai student and two local students. Most of these students are working on theses in the School of Geosciences related to water resources management in the Mekong region, and/or are involved with the Water Resources Management Research Capacity Development Programme (WRMRCDP) based in Cambodia and run in conjunction with AMRC. The excursion was led by Professor Philip Hirsch. The purpose of the excursion was to provide an introduction to water management in Australia and an opportunity for students to compare and contrast water management in the Murray-Darling basin with that of the Mekong basin. Participants met with key staff from the National Water Commission, the Murray-Darling Basin Commission and Murrumbidgee Irrigation, and with farmers in the Murrumbidgee Irrigation Area. The excursion took place over three days and included visits to both Canberra and Griffith (including farms and a local wetland site). Students learned about water management and water reform at the national, regional and local levels in Australia and are now planning to write a joint article on the excursion for publication in the Cambodia Development Review.