\u201cOnly one arrowhead did not fit this pattern,\u201d says Colombian-Brazilian archaeologist Jo\u00e3o Carlos Moreno, lead author of the study and now a professor at the Federal University of Rio Grande (FURG). At the time of his work at the Welsh site, Moreno was a visiting researcher at the University of Exeter as part of his PhD at the National Museum of the Federal University of Rio de Janeiro and was invited to join the team studying the arrowheads. Despite being made of flint from the UK, tip number 10 was made using a technique typical of flintknappers from Armorica, an ancient region that today encompasses the northwest of France.<\/p>\n
This hybrid projectile, produced from British material but using the Armorican method, reinforces the theory that cultural exchanges occurred between the two sides of the English Channel, which separates the British Isles from continental Europe. Specialist stone knappers crossed the sea, probably transporting stones typical of their region. \u201cPeople often think that prehistoric human groups were quite isolated, but this is not true,\u201d says archaeologist Mercedes Okumura of the University of S\u00e3o Paulo (USP), another author of the article. \u201cThe simple fact that there was this mismatch between the technique and the raw material used to make this point from Breach Farm shows that some kind of exchange was taking place in the region.\u201d<\/p>\n The two arrowhead types have a very similar appearance. Both are triangular and almost as thin as a sheet of paper. Their average length is 3.6 centimeters. They were used in funerary rituals, rather than for combat or hunting. In addition to being made of different materials, some small differences are noticeable. The faces of the points made using the Armorican technique are straighter and sharper than those produced by the British method, whose edges are sometimes slightly rounded. Analyses carried out using X-ray fluorescence, a technique that makes it possible to determine the elements of which a rock is composed, suggest that the Greensand chert came from northwest France and the flint came from the British Isles.<\/p>\n Even after repeating the steps employed by the ancient craftsmen at the Welsh site, the experienced Bradley was unable to produce perfect replicas of the original points. His copies were slightly thicker, heavier, and less precisely finished. \u201cThis project showed that my efforts fell short of the skills of the ancient flintknappers,\u201d said the British archaeologist in an interview with Pesquisa<\/em> FAPESP<\/em>.<\/p>\n According to the study, the points from the Welsh site were made using copper tools to shape the rocks. When used to carve stone, copper tools deteriorate less than others made of horn or bronze. The Armorican technique involved initially shaving a thin flake from a piece of Greensand chert. The knappers then used pressure to gradually wear away the material with the aid of a piece of copper, carving an arrowhead shape.<\/p>\n Bruce Bradley \/ University of Exeter<\/span>Copper tools used to make the stone point replicasBruce Bradley \/ University of Exeter<\/span><\/p><\/div>\n In the British method, considered less refined, the arrowhead was carved directly into a piece of flint by striking it repeatedly, chipping away at the material by hitting it directly. Fine adjustments were made at the end using pressure techniques.<\/p>\n Archaeologists have evidence that both the Greensand chert and flint were subjected to some form of heat treatment in the Bronze Age to make them more malleable, which would have facilitated the flaking and chipping methods. It is unknown how exactly they heated the rocks at that time\u2014whether the stones were placed in an open fire or buried and \u201ccooked\u201d in a covered stove. In the lab, Bradley chose to heat the rock samples used for the replicas in an electric oven at 210 degrees Celsius (\u00b0C) for 4 hours.<\/p>\n \u201cThe new study shows how skilled Bronze Age knappers were,\u201d French archaeologist Cl\u00e9ment Nicolas, a specialist in the European Bronze Age from the French National Center for Scientific Research (CNRS) who has also published work on the Breach Farm points, said in an interview with Pesquisa<\/em> FAPESP<\/em>. Nicolas, however, questions the authors’ claim that Breach Farm arrowheads made of Greensand chert came from rocks in northwestern France. \u201cIdentifying the geochemical signature of sedimentary rocks is a highly complex task, especially when it involves a large area covering southern Britain and northern France, where the geology is very similar,\u201d explains the Frenchman.<\/p>\n Nicolas also argues that the two techniques identified in the study may represent different skill levels in the same chain of operations, rather than two different arrowhead production methods used by different peoples in different places. From this other perspective, the theory would be that the most skilled artisans at Breach Farm made points using the pressure technique alone, while those less able used striking first and then pressure. The scientist also points out that while heating the stones makes them easier to shape, other studies have shown that heating is not necessary to make points as thin as those found at the Welsh site. Further research on these arrowheads should attempt to answer these remaining questions.<\/p>\n![\"\"](\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2023\/01\/058-060_arqueologia_320-0-img.png\")
Alexandre Affonso<\/span><\/p>\n![\"\"](\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2023\/01\/058-060_arqueologia_320-3-1140.jpg\")