Environmental factors for around 306 million years ago in the Voyage area
Grey-green, micaceous sandstone (litharenite), and grey-green mudstone, with thin coals and limestone beds known as the ‘Spirobis’ limestone, with local intraformational conglomerate, strata may be reddened, locally.
Around 306 million years
Environment of rock formation
Open shallow shelf sea, with intense evaporation of sea water. Similar to Red Sea of today’s world.
On the equator
Oxygen as percentage of atmosphere
35% (21% today)
Carbon Dioxide as parts per million of atmosphere composition
340ppm (around 415ppm today and rising)
Maximum day time temperatures
Minimum night time temperature
Sun high in northern sky
Earthquake risk (scale 1 low risk to 9 high risk)
Variscan Mts eroded to low profile
None in area
Big insects, big millipedes, scorpions and spiders.
On land plants spread creating new habitats
Days in year