Environmental factors for around 183 million years ago in the future Bredon Hill area

Rock Name
Marlstone Rock Formation (previously known as Marlstone Rock Bed)

Lithology (appearance)
Sandy, shell-fragmental and ooidal ferrunginous limestone, interbedded with ferringinous calcareous sandstone.

Period
Lower Jurassic

How old
Around 183 million years

Environment  of rock formation
Shallow warm clear seas

Climate
Subtropical

Latitude
45′ N of Equator

Oxygen as percentage of atmosphere
20% (21% today)

Carbon Dioxide as parts per million of atmosphere composition
1100ppm (around 415ppm today and rising)

Maximum day time temperatures
29’C

Minimum night time temperature
12’C

Sea temperature
24’C

Weather risk

Midday Sun
High in southern hemishphere

UV index
8

Earthquake risk (scale 1 low risk to 9 high risk)
6

Tectonic
Crustal extension associated with Atlantic opening.

Volcano risk
None in area

Top predator
Icthyosaurus

Animal Life
Pleiosaurus – Ichthyosaurus – bony fish – Ammonites

Plant Life
Cycads – Ginkgo – ferns

Humidity

Rainfall

Wind

Day length
23 hours

Days in year
385