Earth:Teign Valley Group

Teign Valley Group Stratigraphic range: Famennian (Devonian) to Marsdenian (Carboniferous)
Folded slate of the Boscastle Formation at Penally Point, Boscastle
Type	Group
Unit of	Culm Supergroup
Sub-units	Barras Nose Formation, Trambley Cove Formation, Teign Chert Formation, Dowhills Mudstone Formation, Boscastle Formation
Underlies	Holsworthy Group
Overlies	Exmoor Group
Thickness	100 to 720m
Lithology
Primary	mudstones,
Other	cherts, sandstones, limestones, basaltic lavas, tuffs
Location
Region	England
Country	United Kingdom
Extent	north Cornwall through Devon to west Somerset
Type section
Named for	valley of River Teign

The Teign Valley Group is a late Devonian to late/middle Carboniferous lithostratigraphic group (a sequence of rock strata) in north Cornwall through Devon and into west Somerset in southwest England . The name is derived from the valley of the River Teign. The Group comprises (in ascending order i.e. oldest first) the Barras Nose, Trambley Cove, Teign Chert and Dowhills Mudstone formations. It was formerly known as the Lower Culm Group or Lower Culm Measures.