Sarn y Bwch
Reef in Cardigan Bay, Wales
Sarn y Bwch, (Welsh for 'buck's causeway'), is one of three parallel reefs extending beneath the sea into Cardigan Bay from the west coast of Wales. The causeway, probably a medial moraine, is made of glacial deposits left by receding ice sheets at the end of the last ice age. It is sometimes called Sarn y Bwlch ('the causeway of the pass'), but this form is later and less common than Sarn y Bwch.
Sarn y Bwch is the central one of the three, extending south-westwards from near Tywyn. To the north is the causeway of Sarn Badrig, whilst to the south is Sarn Gynfelyn, which extends from near Aberystwyth.
Begin with the source’s own compact description: “Sarn y Bwch” is reef in Cardigan Bay, Wales. The dossier treats that line as a proposition to test through Sarn, Bwch and Reef, not as a finished interpretation.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 12, 2024. The linked authority identifier is Q7424322. Authority coordinates are 52.608, -4.137. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
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This entry incorporates text from “Sarn y Bwch” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.