mega-what / prehistoric horizon calendars / Ireland, West Cork, Rosscarbery

Ahaglaslin Portal Tomb: Luni-solar rises

East centred view with luni-solar trajectories c.3000BCE from Ahaglaslin Portal Tomb, Cork, Ireland. The true profile of the eastern horizon is obscured but it is so close that exact observer position would be very significant. The tomb axis is towards summer cross-quarters. One could imagine that equinox and winter cross-quarters are at significant points.
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© Michael Wilson.