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24 October 2018
Geologist shares ground-breaking findings at Alex du Toit lecture
From the left: Prof Marian Tredoux, Associate Professor in the UFS Department of Geology, Prof Lew Ashwal, and Snegugu Zigubu, BSc (Hons) Geology student.
The Department of Geology at the University of the Free State (UFS) was recently the host of a lecture in the 2018 Alex du Toit Memorial Lecture series.

The speaker at this event was the A-rated NRF researcher, Prof Lew Ashwal from the University of the Witwatersrand. He addressed academics and geology students on ‘Wandering continents of the Indian Ocean’.

Lost continent found

In this talk he specifically shared the research he conducted on the islands of Madagascar (which he visited 30 times to conduct field work and says it is not for the faint-hearted), the Seychelles, and Mauritius. 

Two things stood out in his lecture: the way in which his findings on the three islands helped to refine details about the assembly of the Gondwana supercontinent, and the report of a ‘lost continent’ found under Mauritius. 

These discussions were linked by Prof Ashwal’s belief that the so-called lost continent he found under Mauritius is a leftover from the break-up of Gondwana,

The discovery was made when he and a team of researchers found zircon from 2000 million years ago on a 9-million-year-young island. He believes that the piece of crust (where the tested zircon probably formed), which was covered by lava during recent volcanic eruptions on the island, is a tiny piece of the ancient continent which broke off from Madagascar, when Africa, India, Australia and Antarctica split up and formed the Indian Ocean.

Media frenzy 

The fact that the team of researchers found these extremely old minerals proves that there are materials under Mauritius that originated from a continent under the island. 

Prof Ashwal is studying the break-up process of the continents in order to understand the geological history of the planet.

For his work Prof Ashwal has enjoyed coverage from publications as far apart in focus from each other as The New York Times and Cosmopolitan magazine. 

News Archive

New digital planetarium first of its kind for Sub-Saharan Africa
2013-10-10

Mr Andrew Johnson, Sky-Skan engineer, explains how the dataprojector of the new digital planetarium functions.
10 October 2013

The University of the Free State (UFS) is the first in the world to boast a modern digital planetarium which was erected within an existing observatory.

It is also the first planetarium of its kind for Sub-Saharan Africa.

“What makes the project unique is the fact that we convert the existing observatory structure into a modern digital planetarium. It hasn’t been done anywhere else,” says Andrew Johnson, engineer at Sky-Skan, the company supplying the equipment and also installing it.

Andrew has worked on similar projects, with his company installing digital planetariums around the world.

What makes the planetarium so special is the fact that it offers visitors an inclusive experience.

“Previously visitors could only watch projected stars and constellations, but with the digital planetarium they can now experience a journey through space which feels very close to reality.”

Andrew points out that, apart from stargazing and travelling through space, the digital planetarium allows the audience to visit planets, explore the secrets of the oceans or even organs in the human body.

The planetarium will also be used for concerts, state-of-the-art presentations, theatre productions, as well as meetings, conferences and exhibitions.

The auditorium can seat approximately 90 adults or 120 children.

The digital dome that was recently fitted into the existing observatory structure, is a 12-metre seamless aluminium screen complemented by a powerful surround-sound system and multiple data projectors from Sky-Skan. This results in an immersive experience of the digital universe, as well as the recreation of the macro and micro cosmos an a variety of other environments.

The planetarium will be officially opened on Friday 1 November 2013 by Derek Hanekom, Minister of Science and Technology. Prof Matie Hoffman from the Department of Physics at the UFS is delighted at this visit from Minister Hanekom.

“This recognition and national interest demonstrates the importance and contribution of the first digital planetarium in Sub-Saharan Africa to science and astronomy.  It is also evidence that a facility like this is important for the training of the next generation of scientists.”

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