summarizing article ...
https://www.ucl.ac.uk/news/2015/dec/stonehenge-bluestone-quarries-confirmed-140-miles-away-wales
main article on the archaeology, outlining a theory that this is the main source for stonehenge's bluestones ...
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/D1E66A287D494205D22881CBF1F6DDE8/S0003598X15001775a.pdf/craig_rhosyfelin_a_welsh_bluestone_megalith_quarry_for_stonehenge.pdf
associated article on the rock chemistry ...
https://www.cambridge.org/core/journals/antiquity/article/beyond-stonehenge-carn-menyn-quarry-and-the-origin-and-date-of-bluestone-extraction-in-the-preseli-hills-of-southwest-wales/5F25C1A03B82463C75EAF5CC592C5227
ordnance map of immediate locality ...
part of geological map showing distribution of fishguard rocks
view to top of the craig from the adjacent road
two views from ground level from the east side of the quarry, four years after clearance, digging, and re-instatement
principle dissenters' perspective ...
https://www.researchgate.net/publication/286775899_OBSERVATIONS_ON_THE_SUPPOSED_NEOLITHIC_BLUESTONE_QUARRY_AT_CRAIG_RHOSYFELIN_PEMBROKESHIRE
