Rosalie Tostevin

Rosalie has a PhD in Precambrian sedimentary geochemistry from UCL, and a Master’s degree in geology from the University of Cambridge. She worked as a postdoc at the University of Otago for six months and the University of Oxford for three years. She joined the University of Cape Town as a lecturer in 2019.

PhD Students

Brooke Johnson

Brooke is based at the University of Oxford, researching phosphorous cycling in the Mesoproterozoic Roper Group, Australia, using traditional petrography and modern micro-analytical techniques.

Master’s Students

Emma Rosier

Emma is based at the University of Oxford, using culturing techniques to assess the impact of low sulfate seawater on microbial metabolisms. Her research will help us understand how life responds to changes in seawater chemistry through time.

Honours Students

McDonald Mtonda

McDonald is using oxygen isotopes in quartz veins to investigate fluid movement and deformation in Neoproterozoic glacial deposits from Koegel Fontein.


Matthew Brady

Matt was a Master’s student at the University of Oxford, and is now a PhD student at the University of Cambridge. He used experiments to constrain sedimentary phosphate cycling under ferruginous conditions.

Alice Ashpitel

Alice was a Master’s student at the University of Oxford. She used experiments to understand iron and carbon cycling on early Mars.

Honorary Members

Dora Tostevin

Sometimes assists in the field. Works hard under all conditions. Expert on sticks and squirrels.

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