The BGS Lexicon of Named Rock Units — Result Details

Hangman Sandstone Group [Obsolete Name And Code: See HASA]

Computer Code: HGMS Preferred Map Code: notEntered
Status Code: Index Level
Age range: Eifelian Age (DI) — Givetian Age (DV)
Lithological Description: Quartzitic sandstones, locally coarse or conglomeratic, some slates. Colours red, green, variegated. Rare plant remains marine fossils at upper boundary.
Definition of Lower Boundary: Drawn at the base of the Triscombe Beds where it rests conformably upon the Lynton Beds.
Definition of Upper Boundary: Drawn at the conformable upward passage from the Sherry Combe Beds to the Ilfracombe Beds.
Thickness: 1219m approx.
Geographical Limits: North Devon, England.
Parent Unit: Not Entered (?)
Previous Name(s): Hangman Grits [Obsolete Name And Code: Use HASA] (HAG)
Alternative Name(s): Hangman Sandstone Formation
Type Area  Hangman Hill to Martinhoe, east of Combe Martin, North Devon. 
Etheridge, R. 1867. On the physical structure of west Somerset and north Devon and on the palaeontological value of the Devonian fossils. Quarterly Journal of the Geological Society of London, Vol. 23, p.568-698. 
Hallam, A D, 1934. The geology of the Hangman Grits of the Quantock Hills. Geological Magazine, Vol.71, p.433-446. 
House, M R, Richardson, J B, Chaloner, W G, Allen, J R L, Holland, C H and Westoll, T S. 1977. A Correlation of Devonian rocks of the British Isles. Geological Society of London, Special Report No.8, Scottish Academic Press, Edinburgh. 
Evans, J W. 1922. The geological structure of the country round Combe Martin. Proceedings of the Geologists' Association, Vol.33, 201-228. 
Sedgwick, A and Murchison, R I, 1836. A Classification of the old slate rocks of North Devonshire. British Academy for the Advancement of Science, Report No.5, p.95. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable