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

Cwm Garw Stone Pair: Luni-solar rises

East centred view with luni-solar trajectories c.1800BCE from Cwm Garw Standing Stone Pair, Mynachlog Ddu, Pembrokeshire, Wales. The equinox is at a slight steepening of the slope, the equinox / summer cross-quarter midpoint is at an obvious break and summer cross-quarters are at the turn of the slope top.
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© Michael Wilson.