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The discovery was made when the team undertook fieldwork to stabilise and investigate a portion of the La Cotte de St Brelade cave, on Jersey’s south eastern coastline.
A large portion of the site contains sediments dating to the last Ice Age, preserving 250,000 years of climate change and archaeological evidence.
“In terms of the volume of sediment, archaeological richness and depth of time, there is nothing else like it known in the British Isles. Given that we thought these deposits had been removed entirely by previous researchers, finding that so much still remains is as exciting as discovering a new site,” says Dr Matt Pope of the Institute of Archaeology at University College London, who helped lead the research.
The results showed that part of the sequence of sediments dates between 100,000 and 47,000 years old, indicating that Neanderthal teeth which were discovered at the site in 1910 were younger than previously thought, and probably belonged to one of the last Neanderthals to live in the region.
“The discovery that these deposits still exist and can be related to previously excavated deposits opens up a range of exciting possibilities,” says Dr Martin Bates, University of Trinity St Davids, who is leading current fieldwork at the site.
The findings bring the large collections of stone tools, animal bone and the Neanderthal remains from the area under renewed study.
“We were sure from the outset that the deposits held some archaeological potential, but these dates indicate we have uncovered something exceptional,” explains Pope. “We have a sequence of deposits which span the last 120,000 years still preserved at the site. Crucially, this covers the period in which Neanderthal populations apparently went ‘extinct’.”
It was during this period that Neanderthals appear to have been replaced by our own species – Homo sapiens.
“For over a hundred years the Societe has tried to maintain the interest of the wider academic world in La Cotte, having realised its international importance from the beginning. We are delighted, therefore, that such a prestigious team is now studying the site, and, in addition, the wider Palaeolithic landscape of Jersey,” says Neil Molyneux, president of the Société Jersiaise
The wider project, supported also by the Arts and Humanities Research Council and the Jersey Government will now continue to investigate the site and material excavated from it over the past 110 years.
“We may be able to use this evidence to better understand when Neanderthal populations disappeared form the region and whether they ever shared the landscape with the species which ultimately replaced them, us,” he concludes.