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):
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. 
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). 
Lawson,J D. 1954. The geology of the May Hill Inlier. Quarterly Journal of the Geological Society of London, Vol. III, 85 - 116 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable