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

Rhos Fach Stone Pair: Luni-solar sets

West centred view with luni-solar trajectories c.1800BCE from Rhos Fach Standing Stone Pair, Mynachlog Ddu, Pembrokeshire, Wales. The equinox is on a hilltop. Summer cross-quarters are in a dip. Winter cross-quarters are on a slope with quarter-month brackets at top and bottom.
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© Michael Wilson.