Northumberland Coalfield

The Northumberland Coalfield is a coalfield in north-east England. It is continuous with the Durham Coalfield to its south. It extends from Shilbottle in the north to the boundary with County Durham along the River Tyne in the south, beyond which is the Durham Coalfield.
The two contiguous coalfield areas were often referred to as the Durham and Northumberland Coalfield(s) or as the Great Northern Coalfield.
Coal seams.
The following coal seams are recorded from the Northumberland Coalfield. They are listed here in stratigraphic order with the youngest at the top and the oldest/deepest at the bottom. Not all seams are named and not all occur at any one locality.
Pennine Coal Measures Group.
Upper Coal Measures
Middle Coal Measures
Lower Coal Measures
Yoredale Group.
Stainmore Formation (Namurian)
Alston Formation (Visean)