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:
Reference Section  Oldham's Quarry, Hollington (Charsley, 1982, fig.3). 
Reference Section  Fielding's Quarry, Greatgate (Charsley, 1982, fig.3). 
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(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