The BGS Lexicon of Named Rock Units — Result Details

Hollington Formation [Obsolete Name And Code Use: HEY]

Computer Code: HOL Preferred Map Code: HOL
Status Code: Pending Upgrade
Age range: Early Triassic Epoch (TE) — Anisian Age (TA)
Lithological Description: Sandstone, fine- to coarse-grained, part pebbly, with subordinate siltstone/mudstone; commonly in upward-fining units.
Definition of Lower Boundary: Drawn where well-cemented pale coloured sandstones overlie red, softer, finer grained sandstones of the Hawksmoor Formation; erosion surface commonly present.
Definition of Upper Boundary: Transitional to Denstone Formation, where sandstone-dominated sequence gives way to finer-grained lithologies.
Thickness: 35-50m
Geographical Limits: Needwood Basin; Staffs/Leics/Derbys.
Parent Unit: none recorded or not applicable
Previous Name(s): Keuper Sandstone, Lower [Obsolete name and code, use HEY] (-709)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Between Hollington and Alton, Staffordshire. 
Reference Section  For top of formation. Windyharbour Borehole, 103.16m to bottom at 123.50m (SK04SE/16). 
Reference Section  For base: Mickleton Rock. 9.6m Hollington Formation on 2.6m Hawksmoor Formation; erosive contact. 
Reference Section  Oldham's Quarry, Hollington (Charsley, 1982, fig.3). 
Reference Section  Fielding's Quarry, Greatgate (Charsley, 1982, fig.3). 
Reference(s):
Charsley, T J, 1982. A standard nomenclature for the Trassic formations of the Ashbourne district. Report of the Institute of Geological Sciences, No. 81/14. 
Hull, E, 1869. The Triassic and Permian rocks of the Midland Counties of England. Memoir of the Geological Survey of Great Britain. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E124