Environmental factors for around 680 million years ago in the Voyage area

Rock Name
Malverns Complex

Lithology (appearance)
Diorite and other metamorphic rocks

Period
Precambrian

How old
Around 680 million years

Environment  of rock formation
Volcanic island arc

Climate
Polar

Latitude
60′ S of Equator

Oxygen as percentage of atmosphere
?

Carbon Dioxide as parts per million of atmosphere composition
?

Maximum day time temperatures
-10’C

Minimum night time temperature
-80’C

Sea temperature
Frozen

Weather risk
Extreme cold, blizzards, very cold winds

Midday Sun
Six months darkness, then very low angle sun in northern sky

UV index
1

Earthquake risk (scale 1 low risk to 9 high risk)
10

Tectonic
Above subduction zone. with associated volcanic island arc

Volcano risk
Explosive volcanoes, ejecting molten rock and ash.

Top predator
None

Animal Life
Primitive multi-cellular life in the oceans

Plant Life

Humidity
Very low

Rainfall
Snowfall – drifting snow

Wind
Strong polar winds

Day length
20 hours

Days in year
420