mega-what / prehistoric horizon calendars / Ireland, West Cork, Beara, Ardgroom

Ardgroom Multiple Stone Circle: Luni-solar sets

West centred view with luni-solar trajectories c.1200BCE from Ardgroom Multiple Stone Circle, Cork, Ireland. Equinox sunset is on a hilltop, as are the ones a half-month to either side. The equinox / cross-quarter mid­points are both indicated by dips and the cross-quarters themselves are at breaks on slopes.
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© Michael Wilson.