Search Details
Word: paleoproterozoic
(lookup usage)
(lookup stats)
Meaning:
Adjective:
- geology Of a geologic era within the Proterozoic eon; comprises the Siderian, Rhyacian, Orosirian and Statherian periods from about 2500 to 1600 million years ago, when cyanobacteria increased the amount of oxygen in the atmosphere and changed life on Earth for ever.
Source: Wiktionary
| Src Info »
Proper noun:
- geology The Paleoproterozoic era.
Source: Wiktionary
| Src Info »