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

Derreennaclogh Rock Art c.3000BCE: Luni-solar rises

East centred view with luni-solar trajectories c.3000BCE from Derreennaclogh Rock Art, Cork, Ireland. Equinox / winter cross-quarter midpoint is in the hilltop dip, cross-quarters at a dip / step at the right end. Equinox / summer cross-quarter midpoint is at the left base of the hill, cross-quarters in a dip.
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© Michael Wilson.