The Canonbie Coalfield is a small and largely concealed coalfield

Coalfield

A coalfield is an area of certain uniform characteristics where coal is mined. The criteria for determining the approximate boundary of a coalfield are geographical and cultural, in addition to geological...

 at Canonbie

Canonbie

Canonbie is a small village in Dumfries and Galloway in south west Scotland, six miles south of Langholm and two miles north of the Anglo-Scottish border. It is on the A7 road from Carlisle to Edinburgh, and the River Esk flows through it...

 in the south of Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. Survey work in recent years revealed potentially economically workable reserves beneath a cover of New Red Sandstone

New Red Sandstone

The New Red Sandstone is a chiefly British geological term for the beds of red sandstone and associated rocks laid down throughout the Permian to the beginning of the Triassic that underlie the Jurassic Lias; the term distinguishes it from the Old Red Sandstone which is largely Devonian in...

 rocks.

The following coal seams occur within the Pennine Middle Coal Measures

Coal Measures

The Coal Measures is a lithostratigraphical term for the coal-bearing part of the Upper Carboniferous System. It represents the remains of fluvio-deltaic sediment, and consists mainly of clastic rocks interstratified with the beds of coal...

 Formation in this coalfield:

• Knottyholm
• Archerbeck
• Six Foot
• Nine Foot
• Five Foot
• Eight Foot
• Seven Foot

Further less important seams lie within the underlying Pennine Lower Coal Measures Formation and within the overlying strata of the Pennine Upper Coal Measures Formation and the Warwickshire Group

Warwickshire Group

The Warwickshire Group is a lithostratigraphic unit of rock strata defined within the British Carboniferous system. Within the Pennine Basin it overlies the Coal Measures Group and is deemed to be of late Westphalian and Stephanian age...

including the 'High Coal' at the base of the latter.