Environmental factors for around 417 million years ago in the Voyage area
Raglan Mudstone Formation
Red mudstones and silty mudstones with calcretes and sandstones.
Around 417 million years
Environment of rock formation
Low lying coastal plains. Slow meandering rivers which frequently flood. Hot with high rate of evaporation through soils.
Arid. High rate of evaporation of ground water.
28′ S of Equator
Oxygen as percentage of atmosphere
17% (21% today)
Carbon Dioxide as parts per million of atmosphere composition
3300ppm (around 415ppm today and rising)
Maximum day time temperatures
Minimum night time temperature
Sheet flooding in wet season. Dust storms.
Sun high in northern sky. Slightly less bright
Earthquake risk (scale 1 low risk to 9 high risk)
On SE edge of Laurussia. Subduction zone to south.
Occasional ash falls
Evidence of animals moving from sea onto land.
Primitive Cooksonia growing along river banks.
Seasonal – Dec to March
Winds mainly from E
Days in year