Difference between revisions 1725640 and 1725982 on cywiki

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Llinell amser ddaearegol
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<th style="background:#efefef;">Blynyddoedd CP<sup>3,6</sup></th>
<th style="background:#efefef;">[[Cyfres (stratigraffeg)|Cyfres]] <br /><small>''Epoc''</small></th>
(contracted; show full)4.57 biliwn- ffurfiad y [[Ddaear]]
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[[Categori:Cyfnodau daearegol| ]]
[[Categori:Daeareg]]
[[Categori:Gwyddorau daear]]