Jensen, Mogens

2020 Helleristninger som solkalendere i bronzealderen. William Dams Forlag, Ronne. 

Kaul, Fleming, Martin Stolte, Finn Ole Nielsen, and Gerhard Milstreu

2005 Helleristninger: Billeader fra Bornholms bronzealder. Bornholms Museum Wormianum.

Kaul et al. (2005:Figure 102) illustrate a similar ship petroglyph Storklokkebakke as dating from 800 to 700 BC.

Hammersholm, a Bronze Age petroglyph site on the island of Bornholm (Denmark). Many thanks to Jens Baunsgaard for sharing his knowledge of this wonderful site.

Footprint petroglyph.

Jensen (2020:258) argues that this petroglyph form of a ship should be dated 1100 to 900 BC. 

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Michael Fuller (left), Jens Baunsgaard (center) and Neathery Fuller (right) at Hammersholm on 5 September 2022.

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