The Royal Society of Tasmania Lecture: The Tamar Valley and Cataract Gorge origins: a new geological perspective

Dramatic new insights into the origins of the Tamar Valley and the Northern Midlands are emerging from innovative 3D geological modelling that reconstructs the region's evolution over the past 40 million years. This compelling story reveals how powerful and interconnected geological forces have shaped the landscapes we know today, from broad river valleys to distinctive landforms. The research challenges long-held assumptions and culminates in a surprising new explanation about the formation of one of Tasmania’s most iconic natural features, the Cataract Gorge. Join us as we explore how cutting-edge science is transforming our understanding of northern Tasmania’s geological past. Presenters Bob and Tom Cotton Robert Cotton (Bob) has spent 50 years as a geologist and consultant specialising in mineral exploration. He has worked throughout Australia and overseas. Over the past four years, Bob's expertise in computer modelling of ore deposits has been applied to the Tamar Valley. Tom Cotton is currently Senior Learning Designer at RMIT. A 30-year career infusing learning practice with technology across all public and private education sectors. He brings his digital media and presentation skills to Bob’s project. Date: Sunday 1 November 2026 Time: Foyer drinks from 3.30 pm for the 4.00 pm lecture Place: Geology Lecture Theatre, UTAS. Clark Road, Sandy Bay 7005. Parking adjacent to Clarke Rd. Admission: Free for Members. All welcome. Non-members and guests: a $10 donation would be gratefully appreciated.