Environmental factors for around 410 million years ago in the Voyage area
Rock Name
Fynnon Limestone
Lithology (appearance)
Silicate-conglomerate, Calcite-cemented (calcrete).
Period
Devonian
How old
Around 410 million years
Environment of rock formation
Semi-arid conditions, seasonal rainfall.
Climate
Tropical. Semi-arid. Wet season.
Latitude
21′ S of Equator
Oxygen as percentage of atmosphere
17% (21% today)
Carbon Dioxide as parts per million of atmosphere composition
3500ppm (around 415ppm today and rising)
Maximum day time temperatures
35’C
Minimum night time temperature
15’C
Sea temperature
24’C
Weather risk
Heat. Dust storms. Extensive floods in wet season.
Midday Sun
High in northern sky
UV index
8
Earthquake risk (scale 1 low risk to 9 high risk)
3
Tectonic
Crust of area coming under compressional forces.
Volcano risk
None in area
Top predator
Scorpions
Animal Life
Scopions. Jawless fish in rivers.
Plant Life
Low growing vascular plants – shallow roots
Humidity
Low
Rainfall
100-500mm per year in wet season
Wind
SE
Day length
21.4 hours
Days in year
410