Tonian 1
noundomain: time
EnWordnet [ver.5.0]
Definition
The Tonian is the first geologic period in the Neoproterozoic Era and lasted from 1000 to 850 million years ago.
Examples
- 1.The first radiation of acritarchs occurred during the Tonian.
The Tonian is the first geologic period in the Neoproterozoic Era and lasted from 1000 to 850 million years ago.
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