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

Derreennaclogh Rock Art c.1800BCE: Luni-solar sets

West centred view with luni-solar trajectories c.1800BCE from Derreennaclogh Rock Art, Cork, Ireland. Winter cross-quarters are on a distant hilltop, summer ones on the crest of a rise.
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© Michael Wilson.