Dartmouth Group

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Dartmouth Group
Stratigraphic range: Lochkovian to Pragian (Devonian)
Sugary Cove - geograph.org.uk - 805856.jpg
Rocks of the Dartmouth group at Sugary Cove near Dartmouth
Type Group
Sub-unitsWhitsand Bay Formation, Bin Down Formation
Underlies Meadfoot Group
Thicknessup to 3300m
Lithology
Primary mudstones,
Other siltstones, sandstones, basaltic lavas, tuffs, hyaloclastite
Location
RegionEngland
Country United Kingdom
Extentnorth 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. [1]

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References

  1. British Geological Survey. "Dartmouth Group". BGS Lexicon of Named Rock Units. Retrieved 3 November 2018.