Fractured clasts in the Mt Currie Conglomerate at Kata Tjuta (Central Australia): evidence of Early Cambrian earthquakes?

Research at Uluru-Kata Tjuta National Park reveals that fractured clasts within the Early Cambrian Mt Currie Conglomerate may provide evidence of seismic activity from over 500 million years ago. Unlike the surrounding matrix, these fractures are isolated to specific clasts and form two distinct sets, suggesting tectonic jointing. While the exact cause—whether seismic or aseismic deformation—remains debated, the findings hint at potential Early Paleozoic earthquakes in Central Australia. The study analyzed the geological structure of Kata Tjuta's bornhardts (inselbergs) to assess fracture patterns and their implications for ancient seismic events.

Tokarski, A. K., & Strzelecki, P. J. (2020). Fractured clasts in the Mt Currie Conglomerate at Kata Tjuta (Central Australia): evidence of Early Cambrian earthquakes? Geology, Geophysics and Environment, 46(1), 29. https://doi.org/10.7494/geol.2020.46.1.29