South Luangwa: Where Geology, Fossils and Deep Time Shape a Wildlife Paradise
Fossils, Dinosaurs, and Deep Stories
Source: The Geology of Zambia and the Fauna, Flora and Geology of the South Luangwa National Park by Brian Jeffery, Peter del Strother and Steve Tolan.
When guests arrive in South Luangwa, they often comment on the drama of the landscape — the wide valley floor, the distant escarpments, the winding Luangwa River. What’s less obvious is that this scenery is the result of a geological story stretching back hundreds of millions of years, long before wildlife, rivers or even Africa looked as they do today.
South Luangwa sits within the Luangwa Rift Valley, a vast geological structure formed during the break-up of the ancient supercontinent Gondwana. This rifting began around 300 million years ago, creating a long, sunken basin bounded by major fault lines. Over time, the valley filled with sediments — layers upon layers laid down by ancient rivers, lakes, glaciers and floodplains.
Unlike the better-known East African Rift, the Luangwa Rift is often described as a “fossil rift”. Its main tectonic activity ended long ago, leaving behind a stable but deeply sculpted landscape. Today’s escarpments, including the imposing Muchinga range, mark the edges of this ancient geological scar.
These sediments tell remarkable stories. The rocks of the Luangwa Valley preserve evidence of dramatic climate shifts — from icy glacial conditions to hot, semi-arid environments. They also hold one of southern Africa’s richest fossil records, including petrified forests and remains of animals that lived around the time of the largest mass extinction in Earth’s history, some 252 million years ago.
Ancient fossilised trees, now turned to stone through a process called permineralisation, can still be found in parts of the park. Their growth rings reveal that these forests once grew in seasonal climates, long before the modern savanna emerged. The valley has also yielded fossils of early reptile-like animals, helping scientists understand how life recovered and evolved after global catastrophe.
One of the experts behind this research is Steve Tolan, based in Mfuwe, who has spent much of his life exploring the Luangwa Valley and neighbouring regions. His fieldwork has led to the discovery of dozens of important fossil specimens, including two Odontocyclops skulls — one of which is on display at the Livingstone Museum. In recognition of his contributions, a fossil species has even been named in his honour: Endothiodon tolani.
Geology doesn’t just explain the past; it shapes the present. The mineral-rich soils of South Luangwa, derived from volcanic and sedimentary rocks, support productive vegetation. Miombo woodland dominates higher ground, while mopane woodland thrives in drier areas. Along the river, fertile alluvial soils fuel lush floodplains that attract large concentrations of wildlife.
Even features enjoyed by guests today are linked to deep geology. Thermal springs in the valley — including those near Kafunta River Lodge — are created when groundwater circulates deep along ancient fault lines, warming naturally before returning to the surface.
Conclusion
In short, South Luangwa’s wildlife spectacle is inseparable from its geological foundations. The animals, the vegetation, the river itself — all are expressions of a landscape shaped over immense spans of time.
For guests who enjoy looking beyond the game drive, understanding this deeper story adds another layer of meaning to time spent in the valley.
For those interested in a detailed scientific exploration of the geology, fossils and prehistory of South Luangwa, a full study is available:
The Geology of Zambia and the Fauna, Flora and Geology of the South Luangwa National Park, produced by Kafunta guests Brian Jeffery and Peter del Strother, together with Mfuwe-based expert Steve Tolan, whose work has contributed to most of the region (and nation)’s geological and palaeontological discoveries.
Credits: in addition to the study referenced above, this blog draws on research by Christian Sidor and Ken Angielczyk, with links to relevant articles provided below.
Photographs by Kafunta Safaris, Steve Tolan, Christian Sidor and Brian Jeffery.
Illustration by Gabriel Ugueto
