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

Derreengreanagh Wedge Tomb: Luni-solar rises

East centred view with luni-solar trajectories c.1800BCE from Derreengreanagh Wedge Tomb, Cork, Ireland. The equinox is at a step in local ground that provides plenty of good markers for the summer half of the year. Winter cross-quarters are at a notch between two distant hills.
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© Michael Wilson.