PPT Slide
- Only ice-albedo feedback and no CO2 feedback
- The IFs – Sturtian glaciogenic rocks; no IFs occurrences with Varanger (Marinoan) glaciation.
- In a SE scenario the IFs should be deposited below the thick tillite units and not above (see the Braemar facies, Australia).
- A SE scenario would not be affected by seasonality (Elatina, sand wedges, wave ripples and tidal deposits).
- There are no indications of extreme sea level fall
- Palaeoproterozoic geological record (2.3Ga; 2.0-1.6Ga IF)