Comb-pit

The Pit–Comb Ware culture or Comb Ceramic culture was a northeast European culture of Pit–Comb Ware-making hunter-gatherers. It existed from around 4200 BCE to around 2000 BCE. The name is derived from the most common type of decoration on its ceramics, which looks like the imprints of a comb.

The distribution of the artifacts found includes Finnmark (Norway) in the north, the Kalix River (Sweden) and the Gulf of Bothnia (Finland) in the west and the Vistula River (Poland) in the south. In the east the Comb Ceramic pottery of northern Eurasia extends beyond the Ural mountains to the Baraba steppe adjacent to the Altai-Sayan mountain range, merging with a continuum of similar ceramic styles. It would include the Narva culture of Estonia and the Sperrings culture in Finland, among others. They are thought to have been essentially hunter-gatherers, though e.g. the Narva culture in Estonia shows some evidence of agriculture. Some of this region was absorbed by the later Corded Ware horizon.

Comb Ceramic was not limited in Europe, being widely distributed in the Baltic, Finland, the Volga upstream flow, south Siberia, Lake Baikal, Mongolian Plateau, the Liaodong Peninsula and the Korean Peninsula. The oldest ones have been discovered from the remains of Liao civilization - Xinglongwa culture (6200 BC - 5400 BC).

...
Wikipedia