风暴过后，威尔士海滩浮现远古森林
It begins as a shiver of dark geometry beneath the retreating tide—gnarled stumps, their roots fossilised into the beach like petrified serpents. After a particularly fierce winter storm, the sands at Borth in mid-Wales peel back to expose the remnants of a forest that flourished five millennia ago, when the coastline lay miles further west and the Irish Sea was still a distant notion. Locals have long known of the timbers, but each revelation feels provisional, as if the sea is merely allowing a brief glimpse of the land it confiscated.
Archaeologists and climatologists alike regard this site—one of the best-preserved submerged forests in Europe—as a natural archive of the Holocene. Carbon-dated to roughly 3000 BCE, the pine, oak, and alder stumps bear the marks of a slow, inexorable drowning: rising sea levels, fed by melting ice sheets, gradually saturated the soil, inviting saltmarsh vegetation and eventually the sea itself. The wood, preserved by peat and anaerobic conditions, occasionally surfaces with tool marks that hint at human presence, a Mesolithic community that must have watched the water claim their hunting grounds incrementally.
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