The BGS Lexicon of Named Rock Units — Result Details

Haugh Wood Formation

Computer Code: HWD Preferred Map Code: HWD
Status Code: Full
Age range: Telychian Age (ST) — Telychian Age (ST)
Lithological Description: At outcrop, flaggy, blue-grey, calcereous sandstones with interbedded olive siltstones and overlain by purple and olive siltstones; in Fownhope Borehole, green-grey siltstones with minor claystones (107.7 m. proved) overlain by 135.3 m. of green-grey sandstones with interbedded siltstones.
Definition of Lower Boundary: Not seen at outcrop; placed at 982 feet in Fownhope Borehole, where green-grey siltstones of the Yartleton (Haugh Wood) Formation overlie interbedded siltstones and sandstones of the Huntley Hill Formation.
Definition of Upper Boundary: Base of limestone of the Woolhope Limestone Formation.
Thickness: 93m at outcrop (base not seen); 243m drilled in Fownhope Borehole.
Geographical Limits: Woolhope Inlier
Parent Unit: May Hill Sandstone Group (MHS)
Previous Name(s): Upper Haugh Wood Beds And Lower Haugh Wood Beds (-972)
Alternative Name(s): Yartleton Formation
Stratotypes:
Type Area  Haugh Wood area, Woolhope. Squirrell & Tucker 1960. 
Reference(s):
Worssam, B C, Ellison, R A and Moorlock, B S P. 1989. Geology of the country around Tewkesbury. Memoir of the British Geological Survey, Sheet 216 (England and Wales). 
Squirrell, H C and Tucker, E V. 1982. Woolhope and Gorsley. In the Silurian Inliers of the South-eastern Welsh Borderland. Geologists' Association Guide, No.5. 
Squirrell, H C and Tucker, E V. 1960. The geology of the Woolhope Inlier (Herefordshire). Quarterly Journal of the Geological Society of London, Vol.116, 139-185. 
Lawson,J D. 1954. The geology of the May Hill Inlier. Quarterly Journal of the Geological Society of London, Vol. III, 85 - 116 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable