Environmental factors for around 179 million years ago in the future Bredon Hill area
Rock Name
Whitby Mudstone (former name Upper Lias)
Lithology (appearance)
Medium and dark grey fossiliferous mudstone and siltstone, laminated and bituminous in part, with thin siltstone or silty mudstone beds and rare fine-grained calcareous sandstone beds.
Period
Middle Jurassic
How old
Around 179 million years
Environment of rock formation
Varying sea depth
Climate
Warm with wet winter season
Latitude
45′ N of Equator
Oxygen as percentage of atmosphere
21% (21% today)
Carbon Dioxide as parts per million of atmosphere composition
2100 ppm (around 415ppm today and rising)
Maximum day time temperatures
29’C
Minimum night time temperature
12’C
Sea temperature
24’C
Weather risk
Thunderstorms
Midday Sun
High in southern sky
UV index
>6 risk of severe skin damage
8
Earthquake risk (scale 1 low risk to 9 high risk)
6
Tectonic
Crustal extension forming basins
Volcano risk
None in area
Top predator
Icthyosaurus
Animal Life
Pleiosaurus – Ichthyosaurus – bony fish – Ammonites
Plant Life
Cycads – Ginkgo – ferns
Humidity
High
Rainfall
Torrential – seasonal
Wind
SE?
Day length
23 hours
Days in year
385