Rhyacian

Rhyacian
Of a geologic period within the Paleoproterozoic era from about 2300 to 2050 million years ago.
2. noun
The Rhyacian period.

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  • Rhyacian — The Rhyacian (IPAEng|raɪˈeɪsiən, el. Ρυαξ ( rhyax ), meaning stream of lava ) is the second geologic period in the Paleoproterozoic Era and lasted from 2300 Ma to 2050 Ma (million years ago). Instead of being based on stratigraphy, these dates… …   Wikipedia

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