SCIENCE|natural and applied sciences|earth sciences|geology
- aois Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- aois gheolaíoch Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- age | geological age
- en
- Sainmhíniú "subdivision of geologic time scale that divides an epoch into smaller parts." Tagairt "Wikipedia > Age (geology) (5.6.2020)"