Sedimentology and geomorphology of Lake Yamma Yamma – A long-lived structurally controlled playa lake of the Lake Eyre Basin

Mann, Sandra1; Amos, Kathryn1

1The University of Adelaide, Adelaide, Australia

This poster details the sedimentology and geomorphic evolution of a modern structurally controlled lake, with an emphasis on dryland lake-delta deposits and paleo shorelines. Lake Yamma Yamma, off Cooper Creek, sits ~750km upstream and ~90m higher than the ultimate base level of the basin at Kati Thanda-Lake Eyre. Satellite imagery, inundation frequency maps, hydrological data and digital elevation data, along with modern sediment observations and descriptions are used to interpret sedimentary processes, depositional elements and the evolution of the playa lake. Results suggest that Lake Yamma Yamma is long lived and evolution is primarily structurally controlled with the lake delta aggrading to the north-west over time, and that paleoshorelines to the north of the lake may be remnant features of a prior climate regime. This poster is for those interested in the sedimentology and geomorphology of dryland continental systems for applications such as landscape evolution, environment, natural resource management.


Biography

Sandra Mann was awarded her PhD in Earth Science from the University of Adelaide in 2018. She currently works with Woodside Energy, interpreting the sedimentology and geomorphology of the giant gas fields in North-Western Australia with 4D monitoring technology.

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