Definition 2024
Tonian
Tonian
English
Adjective
Tonian (not comparable)
- (geology) Of a geologic period within the Neoproterozoic era from about 1000 to 850 million years ago.
Proper noun
Tonian
- (geology) The Tonian period.
Translations
See also
- Appendix:Geologic timescale
Anagrams
