Происхождение
- Country:
- USA
- Published:
- 1889
- Oldest age Ma:
- 4000
- Paragenetic modes:
- Biotic, Secondary, Stage 7: Great Oxidation Event, PM45 - Oxidized fumarolic minerals, PM47 - Low-T subaerial oxidative hydration/weathering, Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere, PM50 - Coal and/or oil shale minerals, Stage 10b: Anthropogenic minerals, PM54 - Coal and other mine fire minerals