page_title: Raet
section_title: The road at Raet
hierarchical_section_title: Raet / The road at Raet
caption_attribution_description: Hortensveien, riksvei 19
context_page_description: Raet is the largest terminal moraine in Scandinavia. It was formed during the end of the last glacial period, 12,800–11,500 years ago, in one of the latest advances of the glaciers.
  As the glacier retreated towards the end of this period, it could stop for hundreds of years before moving forward again. Material that the glacier brought from the inland, such as particles of rocks, gravel, sand and clay, gathered where the edge of the ice laid still for some time. Such deposits, which are partly deposited on land and partly in ocean, are called terminal moraine.
  As the ice pulled back and the land rose, these deposits were left behind in the landscape. Later these deposits have been affected by sea and precipitation so that the roughest material remains on the surface. If you dig yourself through a terminal moraine, it is the variation in the size of the particles that are striking; it consists of unsorted material.
  Several steps of terminal moraines or ra-steps in Norway can be identified. The oldest are located in the sea and along the sea, the youngest in the mountain valleys.
context_section_description: Raet is used as place name for large parts of the ra through Østfold and Vestfold. 
  Raet was in old age a convenient route, because there were so few watercourses to cross. When Bishop Jens Nilsson went on visits to Østfold and Bohuslän in the late 16th century, he traveled along Raet because it was easily accessible. Still E6 in Østfold and E18 in Vestfold follow Raet for long distances.
  Raet also attracted settlements, so that the oldest, largest and best farms are still there.
  Similarly tumuli in Iron Age often was located along Raet.
  The top of the moraine has been used as road from prehistoric times, and in some places Raveien  is the name of the road.
  E18 long followed this old trace in Vestfold from Sem to Farriseidet.
  Now the road in the main traces follows a trace inside the raid.
  In Østfold, E6 follows Raet from Halden to Moss.
  The place Helgeroa in Vestfold, near the Mølen, where Raet descended on the seabed, became a central place for a period of communication precisely because the location lay there the natural road in the direction of the east through Vestfold.
caption: Riksvei 19 between Horten and Tønsberg, near the farm Ra follow the ancient trackway.
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