Geological periods
The word ‘Geology’ comes from the Latin ‘Geo’ meaning Earth and ‘Logy’ meaning study of. So it literally means study of the earth.
It is the rocks of the Tees Valley that have brought industry and money into the area. Some of the rocks to be found here are more important than others. But all of them have in some way played a part in building the Tees Valley.
To find out more about any of the rocks in the Tees Valley select a geological period from the list below. The geological periods are given in chronological order (order of time) with the oldest period at the bottom of the list.