Epoch

Time (million yrs)

Period

Notable geological strata

Quaternary

Less than 0.01

Holocene

River and coastal deposits; soils

c.0.01-0.5

Pleistocene

Glacial and interglacial deposits

c.0.5-1.8

Kesgrave Sands & Gravels

Tertiary

c.1.8-3.7

Pliocene

The Crags

c.52

Eocene

London Clay

c.56

Palaeocene

Reading and Thanet Beds

Mesozoic

c.65-100

Cretaceous

Chalk

c.105

Gault and Red Chalk

c.112

Lower Greensand and Carstone

c.130 - 140

Sandringham Sands and Dersingham Beds

c.153

Jurassic

Kimmeridge Clay

c.160

CorallianBeds

c.165

Oxford Clay

c.169

Cornbrash and Kellaways Beds

c.170

Great Oolite Limestone