mega-what / prehistoric horizon calendars / Ireland, West Cork, Skibbereen / Baltimore

Ringarogy Passage Tomb: Luni-solar sets

West centred view with luni-solar trajectories c.3000BCE from Ringarogy Passage Tomb, Cork, Ireland. The equinox is at a step on a short slope between better markers. Winter cross-quarters are marked by a very local outcrop, summer ones by a break / step. Equinox / cross-quarter midpoints are in a dip and at a step top.
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© Michael Wilson.