mega-what / prehistoric horizon calendars / Ireland, Co. Waterford, Dungarvan

Ballynamona Court Tomb: Luni-solar rises

East centred view with luni-solar trajectories c.3500BCE from Ballynamona Court Tomb, Co. Waterford, Ireland. Summer cross-quarters are marked by a distant dip. The equinox is at the centre of the apparent dip of the coastal profile.
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© Michael Wilson.