mega-what / prehistoric horizon calendars / Wales, North Pembrokeshire, Mynachlog Ddu

Waun Lwyd Stone Pair: Luni-solar sets

West centred view with luni-solar trajectories c.1800BCE from Waun Lwyd Standing Stone Pair, Mynachlog Ddu, Pembrokeshire, Wales. The equinox is on a hilltop and so are the winter cross-quarters but summer ones are indicated by a step. Equinox / cross-quarter midpoints are at a step and at the left end of a top.
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© Michael Wilson.