Stepping out on an ancient coastline at Peppermint Grove


Following the first technical talk of 2018, PESA WA Branch hosted the first evening field trip in partnership with the Geological Society of Australia (GSA) on 6 and 8 March, run over two evenings to cope with demand.

Dr Milo Barham, an expert in Sedimentology and Stratigraphy from Curtin University, led the field trip which focused on exploring the well-exposed, Pleistocene-aged Tamala Limestone.

The mini field trip covered six stops along a charming pathway next to the Swan River, stopping at various outcrops for observations and discussion before leading to the next. After getting our eye in to the several facies of the Tamala Limestone and its structures, Milo explained what the different facies represented in terms of palaeodepositional environments and how these were interpreted in the context of Pleistocene glacio-eustatic sea level changes. Interesting features such as fossils and trace fossils were also observed.

After a stimulating insight into the geological complexity of some of WA’s Quaternary outcrops that can be found on our doorstep, we headed to the local pub, The Albion Hotel, for a short debrief and Q&A session with the field trip leaders over food and drinks.

PESA WA Branch have plans for more field trips this year. If you have any questions or suggestions for a good field trip – please email Rob Ross at

Visit the events page to see the latest branch activities and login to receive member discounts.


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