Finding the Mesolithic: Biomolecular Approaches to Hunter-Gatherer Archaeology
y| Dr. Sophy Charlton, Natural History Museum - December 2017 | Recent Lecture |
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People’s lives in the Mesolithic, 10,000-4,000BC (12,000-6,000 years ago), an understudied but interesting time period, can perhaps be studied using the new techniques of archaeological science. At this time the island of Britain was still attached to the Continent, with Doggerland still exposed. Small mobile groups, adapting to the changing environment, were moving around to target natural resources such as red deer, aurochs, beaver, hares plus such plant foods as hazelnuts, hemp, nettles, sorrel etc. They also exploited seafood: cod, herring, sea bream, saithe, eel, seal, and shellfish: cockles, mussels, limpets. UK Mesolithic sites tend to be in watery locations. At Star Carr in Yorkshire there is now nothing remarkable to be seen, but in the Mesolithic the site was on the edge of a vanished lake now known as Lake Flixton. The natural resources there would have attracted both people and animals. At the site were discovered lithics, barbed antler points, a rare piece of Mesolithic art - an engraved shell pendant with a hole bored in it, perhaps so it could be worn - and the well-known deer skulls fashioned into head-dresses/frontlets – perhaps an animal pelt was attached to them to enable hunters to creep up on a deer, or perhaps they were ritual objects to be used in ceremonies to do with hunting magic - to increase hunting success. At Blick Mead, a Mesolithic hunting camp within the Stonehenge landscape beside a spring which maintains a constant temperature of c13 degrees, a rare alga causes flint from the spring to turn a bright pink colour – perhaps this alga was present in the Mesolithic and the colour change would have seemed magical. Till circa 10-15 years ago, it wasn’t thought there were structures at this time, but at another site, Howick, a circular configuration of postholes suggests a tepee-like structure which might have been covered with turf or animal skins. And recently house forms have been found at Star Carr.
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In the UK the only definite inhumation of the period is Cheddar Man; some of the skeletons found in another cave, Aveline’s Hole, were later lost during WWII bombing, but some of the surviving bones have been found to be Neolithic. From elsewhere there is some disarticulated and fragmented bone, and a late Mesolithic cremation at Langford, Essex. So to study the British Mesolithic requires more excavation, studying modern hunter-gatherer groups, and using archaeological science. |
She tried ZooMS: Zooarchaeology by Mass Spectrometry. Bone collagen contains strings (sequences) of amino acids. Different species of living beings have different sequences. Identify the sequence, you can identify the species. The ZooMS test worked for all 20 pieces: 14 were human, and of the other 6, some seal, some pig (wild boar).
Was the “marine” pig being given marine food, or foraging on human waste containing marine food? Burial context: Sophy found that these human bone pieces did not come from hands and feet, and had all come from one trench outside the midden (dug by Mellars), so some human remains were outside the midden: perhaps they were not looking in the right places for them? Some dates had already been obtained from the island: within 4600-3900BC. Sophy obtained two more, plus two on the terrestrial pigs. All fell between 3900-3600BC, so are probably early Neolithic, but the humans were still on a marine protein diet, suggesting that in the transition period people had different diets at the same time, some still on a marine diet, others an agricultural subsistence. This site was on the cusp of the arrival of farming. Dr Alison Sheridan has suggested an early (Breton) arrival for the Neolithic in West Scotland: 4300-4200BC. Perhaps the lifestyle was different there? And the so-called “rapid change” perhaps covered a couple of hundred years, and need not have happened exactly at 4000BC. Although Sophy tried DNA analysis on the bone for genetic information - was it the same people in the Mesolithic and the Neolithic? - there was not enough human DNA in the very small pieces. However there is a bone in the ear which has the highest amount of DNA, and one such bone from Cnoc Coig is still being worked on. Sophy found the ZooMS technique (previously used on animal bone) can identify human remains. And probably in the future, there will be a lot more protein work, and new questions about Mesolithic pigs in the Inner Hebrides. What were the people doing with their dead? The forager lifestyle was not replaced immediately at the transition? Hopefully advances in archaeological science will enable us to find out more. And objects classed as “useless” are not necessarily so. Yvonne Masson |