A Geological Timescale

GEOLOGICAL TIMESCALE

Shown below is a representation of the rocks underlying the Tees Valley and Darlington districts in Northeast England. The diagram depicts the relative thickness of the different systems. Absolute ages are given alongside. Click on the different areas to view more details about a particular time period.

Geological column showing the relative thickness and absolute ages of rocks underlying the Tees Valley and Darlington.

Geological column showing the relative thickness and absolute ages of rocks underlying the Tees Valley and Darlington.

Quaternary Tertiary Middle Jurassic Lower Jurassic Rheatic Upper Triassic Lower Triassic Upper Permian Lower Permian Upper Carboniferous Jurassic Triassic Permian Carboniferous