Seine-Oise-Marne culture

The Seine-Oise-Marne or SOM culture is the name given by archaeologists to the final culture of the Neolithic and first culture of the Chalcolithic in northern France and southern Belgium.It lasted from around 3100 to 2000 BCE and is most famous for its gallery grave megalithic tombs which incorporate a porthole slab separating the entrance from the main burial chamber.

In the chalk valley of the River Marne rock-cut tombs were dug to a similar design.

Some have examples of megalithic art with images of axes, breasts and necklaces carved on their walls.

Diagnostic artifacts include transverse arrowheads, antler sleeves and crude, flat-based cylindrical and bucket-shaped pottery decorated with appliqué cordons.

The SOM culture had trade links with neighboring cultures enabling the use of Callaïs and Grand Pressingy flint imported from Brittany and the Loire and later, the use of copper.The culture seems to have had strong links with other areas and may have arisen from a composite of influences as indicated by the gallery grave design common across Europe and the pottery types which have comparators in Western France from 2600 BCE and also in Brittany, Switzerland and Denmark.

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