From Wikipedia, the free encyclopedia
Craig a cherrig a chregyn wedi eu malu'n fân dros miloedd ar filoedd o flynyddoedd yw tywod, wrth i'r môr eu taro yn erbyn ei gilydd dro ar ôl tro.
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Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
