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

Ringarogy Passage Tomb: Luni-solar rises

East centred view with luni-solar trajectories c.3000BCE from Ringarogy Passage Tomb, Cork, Ireland. The equinox is at a break on a slope between quarter-month brackets. Winter and summer cross-quarters are at the left bases of hills. Equinox / cross-quarter midpoints are at the left end of hills.
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© Michael Wilson.