Environmental factors for around 410 million years ago in the Voyage area
Rock Name
Senni Formation
Lithology (appearance)
Sandstone And Argillaceous (clay) Rocks, Interbedded. Sandstone beds more dominant that in Freshwater W. Form. – rejuvenation of rivers
Period
Devonian
How old
Around 410 million years
Environment of rock formation
Sediments of the Senni Formation were deposited by rivers draining southwards.
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
3000ppm (around 415ppm today and rising)
Maximum day time temperatures
35’C
Minimum night time temperature
15’C
Sea temperature
24’C
Weather risk
Heat. Flash flooding in wet season.
Midday Sun
High in northern sky
UV index
8
Earthquake risk (scale 1 low risk to 9 high risk)
3
Tectonic
Uplift of areas to NW gives faster rivers.
Volcano risk
None in area
Top predator
Scorpions
Animal Life
Scorpions, Eurypterids, Trilobites, jawless fish
Plant Life
Low growing vascular plants – shallow roots
Humidity
Low
Rainfall
Low
Wind
SE
Day length
21.4 hours
Days in year
410