from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. 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.
- proper n. The Paleoproterozoic era.
Sorry, no etymologies found.
The lower Lesser Himalayan sequence: A Paleoproterozoic arc on the northern margin of the Indian plate
Increases in the overall maximum occurred in discrete steps approximately corresponding to increases in atmospheric oxygen levels in the mid-Paleoproterozoic and Ediacaran-Cambrian - early Ordovician.
The Sudbury impact layer in the Paleoproterozoic iron ranges of northern Michigan,