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