Dartmouth Group

Dartmouth Group
Stratigraphic range: Lochkovian to Pragian (Devonian)
Rocks of the Dartmouth group at Sugary Cove near Dartmouth
Type	Group
Sub-units	Whitsand Bay Formation, Bin Down Formation
Underlies	Meadfoot Group
Thickness	up to 3300m
Lithology
Primary	mudstones,
Other	siltstones, sandstones, basaltic lavas, tuffs, hyaloclastite
Location
Region	England
Country	United Kingdom
Extent	north and east Cornwall to southeast Devon
Type section
Named for	Dartmouth

The Dartmouth Group is an early Devonian lithostratigraphic group (a sequence of rock strata) from north and east Cornwall to southeast Devon in southwest England. The name is derived from the port of Dartmouth. The Group comprises (in ascending order i.e. oldest first) the Whitsand Bay and Bin Down formations. The type area is along the southeast coast of Cornwall. The sequence has had various earlier names including the Dartmouth Beds or Slates.