mega-what / prehistoric horizon calendars / Wales, Carmarthenshire, Pentre Galar / Glandy Cross

Carn Besi Chambered Tomb: Luni-solar rises

East centred view with luni-solar trajectories c.1800BCE from Carn Besi Chambered Tomb, Carmarthenshire, Wales. This horizon is largely obscured but summer cross-quarters seem to be at a basal step and winter ones indicated by a deep valley.
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© Michael Wilson.