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AAPG Field Trip 2020- Ikara-Flinders Ranges: Geological snapshot of the transition to complex life

Friday, 29 May - Sunday, 31 May

Guest Speaker: Dr. Vic Gostin - Field Trip Leader

This trip will be led by Dr. Victor Gostin of University of Adelaide, a highly knowledgeable
and successful Honorary Visiting Research Fellow with almost 50 years experience in
researching, supervising and teaching geology and sedimentology at undergraduate and
postgraduate levels. His research projects involve the effects of climate on the nature and
patterns of sedimentation, with special emphasis on ancient glaciations, modern cool-water
shelf carbonate sand lacustrine sediments. He has been involved in many important
geological discoveries in South Australia, including the identification of an extensive ejecta
blanket derived from Australia’s largest meteorite impact (honoured by asteroid 3640
GOSTIN).

He has also:

  • been appointed Patron of the Friends of the Flinders Ranges National Park
  • made Honorary Member of the Astronomical Society of South Australia
  • provided lectures for Waterhouse Club and Flinders Ranges Tourism Operators Assoc
    Inc surrounding Geology of the Flinders Ranges
  • and been awarded Geological Society of Australia (SA) Bruce Webb Medal for his
    contributions to Earth Sciences education and various aspects of geology, including
    environmental geology, marine geology, planetology and sedimentology

Ikara-Flinders Ranges: Geological Snapshot of the Transition to Complex
Life

The AAPG Student Chapter at the University of Adelaide is delighted to be able to invite PESA SA members to attend this year’s field trip to the Flinders Ranges.  Attendees on the trip will be a mixture of students and industry professionals.

The trip will run from 29th to 31st of May 2020.  The weather at this time of year should be perfect!

We have the privilege of being led by Associate Professor Victor Gosten, a world-renowned expert on the sedimentology and stratigraphy of the Flinders Ranges.  He is very much looking forward to sharing his wealth of experience in the area with everyone.

A detailed introduction and itinerary can be found in the registration document (link below).

We have 8 places available for petroleum industry geoscientists, which will be filled on a ‘first come-first served’ basis.  As we anticipate a lot of interest, please let us know whether you would like to come sooner rather than later, so that we can re-allocate your spot with time to spare should you not be able to make it.

The cost is $800, which will include 24/7 access to Vic’s vast knowledge, all transport, all accommodation and several meals over the weekend.

If you are able to join us please email aapg_uoa@outlook.com, and attach a completed Expression of Interest form (final page of flyer), and provide your name, email address and a contact phone number.  We will then make contact to arrange payment.

N.B.  If you are a student PESA member, please wait for this to be advertised to students through the University of Adelaide.  Please do not apply for these industry places.

Trip Summary

This fieldtrip will examine one of the best records in the world of sedimentary deposition
between around 800 million and 500 million years ago, where these marginal marine and
glaciogenic sediments represent significant changes in Earth’s history.

Deposition took place within an extensive marine basin called the Adelaide Geosyncline, or
Adelaide Rift Complex, in which the seafloor was subsiding along north-south trending series
of step or graben faults. Once a thick sequence of sediment had accumulated in the basin it
was compressed and hardened by deep burial, and subsequently folded by the Delamerian
Orogeny between 514 and 490 Ma. Erosion reduced the highlands to their present form
where they are expressed as the Ikara-Flinders Ranges, Mount Lofty Ranges and the Olary
region of South Australia.

Brachina Gorge in Ikara-Flinders Ranges hosts and exposes the rocks deposited between 650
and 500 million years ago, which show evidence for internationally significant geological
events. One such site marks the base of the Ediacaran Period, which records a major shift in
evolution from simple single-celled life forms to more complex multi-cellular organisms.
Other evidence for noteworthy events in geological history includes:

  • depositional structures in sandy and silty sediments that record varying conditions of
    water depth and temperature
  • dumping of glacial till in meltwater during a period of global glaciation
  • precipitation of ironstone, limestone and dolomite due to chemical and biological
    variations in seawater
  • debris from a large meteorite which impacted near Lake Acraman in the Gawler
    Ranges, 300 km west of Brachina Gorge
  • and the presence of some of the earliest life forms that existed before the world
    renowned Ediacaran fauna

In Pichi Richi Pass, southern Flinders Ranges, tidal rhythmites and Elatina glacial sediments
also detail the younger of the Cryogenian glaciations and its implications for the Snowball
Earth hypothesis.

The objective of this field trip is to provide the petroleum geology students attending the
University of Adelaide with an opportunity to network with industry professionals from across
Australia, while learning new concepts in fantastic field locations. We also hope to provide
industry participants with an informative experience in a well-known and geologically
significant location with concepts that they could potentially apply to their own work.

For more information and a registration form, please click on the link below: 2020-AAPG-Field-Trip-registration.pdf

Details

Start:
Friday, 29 May
End:
Monday, 1 June
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