Environmental factors for around 340 million years ago in the Voyage area
Rock Name
Llanelly Formation (former name Whitehead Limestone)
Lithology (appearance)
Limestones formed around the shore (peritidal) with lagoons where stromatolites develop from calcite muds bound in algal mats.
Period
Carboniferous
How old
Around 340 million years
Environment of rock formation
Coastal barrier islands cutting off salty (hypersaline) lagoons. Occasional storms.
Climate
Equatorial
Latitude
14′ S of Equator
Oxygen as percentage of atmosphere
27% (21% today)
Carbon Dioxide as parts per million of atmosphere composition
450ppm (around 415ppm today and rising)
Maximum day time temperatures
45’C
Minimum night time temperature
29’C
Sea temperature
34’C
Weather risk
Heat. Tornadoes. Storm surges
Midday Sun
Sun overhead
UV index
11
Earthquake risk (scale 1 low risk to 9 high risk)
5
Tectonic
Variscan Mtn ranges rising to south. (S. Europe)
Volcano risk
None in area
Top predator
Sharks beyond barrier islands
Animal Life
Sharks, ammonites, crinoids. Stromatolite growth
Plant Life
On land Carboniferous forests establishing
Humidity
Rainfall
Wind
Day length
22 hours
Days in year
398