mega-what / prehistoric horizon calendars / Ireland, Co. Clare, Corrofin

Leamaneh Court Tomb: Luni-solar rises

East centred view with luni-solar trajectories c.3000BCE from Leamaneh Court Tomb, Clare, Ireland. Summer and winter cross-quarters have useful marks but in both cases the quarter-month closer to the equinox gets a better one.
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© Michael Wilson.