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