Environmental factors for around 191 million years ago in the future Bredon Hill area

Rock Name
Charmouth Mudstone (former name Lower Lias)

Lithology (appearance)
Dark grey laminated shales, and dark, pale and bluish grey mudstones: locally concretionary with tabular limestone beds.

Period
Lower Jurassic

How old
Around 191 million years

Environment  of rock formation
Deep silty sea

Climate
Subtropical

Latitude
45′ N of Equator

Oxygen as percentage of atmosphere
15% (21% today)

Carbon Dioxide as parts per million of atmosphere composition
1000ppm (around 415ppm today and rising)

Maximum day time temperatures
29’C

Minimum night time temperature
12’C

Sea temperature
24’C

Weather risk
Seasonal storms

Midday Sun
High in southern sky

UV index
8

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

Tectonic
Major rifting where Atlantic is starting to open.

Volcano risk
None in area

Top predator
Icthyosaurus

Animal Life
Pleiosaurus – Ichthyosaurus – bony fish – Ammonites

Plant Life
Cycads – Ginkgo – ferns

Humidity
High

Rainfall
Seasonally high

Wind
SE

Day length
23 hours

Days in year
385