Environmental factors for around 240 million years ago in the Voyage area
Helsby Formation (old name Bromsgrove Sandstone)
Fine- to medium-grained, cross-bedded and flat-bedded sandstones. Fluvatile (water) and aeolian (wind) origin.
Around 240 million years
Environment of rock formation
Braided rivers crossing semi-arid land. Rivers often seasonal. Some dunes.
Semi-arid with seasonal rainfall giving flash floods
20′ N of 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
Flash floods. High temperatures.
Sun high in northern sky
Earthquake risk (scale 1 low risk to 9 high risk)
Midst of supercontinent Panagea
None in area
Triassic reptiles e.g. Bromsgroveia
Pine like trees growing close to main river channels
Strong hot dry E to NE winds
Days in year