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