Environmental factors for around 351 million years ago in the Voyage area
Rock Name
Black Rock Limestone (former name Lower Dolomite)
Lithology (appearance)
Thick bedded limestones, many of which are dolomitised (calcium replaced by magnesium).
Period
Carboniferous
How old
Around 351 million years
Environment of rock formation
Open shallow shelf sea, with intense evaporation of sea water. Similar to Red Sea of today’s world.
Climate
Equatorial
Latitude
15′ 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
32’C
Minimum night time temperature
18’C
Sea temperature
25’C
Weather risk
Turbulence from surface storm waves
Midday Sun
Sun high in northern sky
UV index
8
Earthquake risk (scale 1 low risk to 9 high risk)
6
Tectonic
Rheic oceanic plate undergoing subduction to south.
Volcano risk
None in area
Top predator
Sharks
Animal Life
Crinoids, solitary corals and many strange sharks
Plant Life
On land plants spread creating new habitats
Humidity
Rainfall
Wind
Day length
22 hours
Days in year
398