The BGS Lexicon of Named Rock Units — Result Details

Lyon's Gate Bed

Computer Code: LYGB Preferred Map Code: LyGB
Status Code: Full
Age range: Oxfordian Age (JO) — Oxfordian Age (JO)
Lithological Description: Calcareous, commonly oolitic, shelly, ferruginous sandstone or very sandy limestone.
Definition of Lower Boundary: Upward change from clay or sandy clay to sandstone or limestone. Commonly a spring line at base.
Definition of Upper Boundary: Change from sandstone or limestone to grey clay.
Thickness: 0 - 2m
Geographical Limits: In the southwest corner of the Shaftesbury Sheet 313. Possibly a correlative of the Preston Grit of the Dorset coastal succession.
Parent Unit: Hazelbury Bryan Formation (HYB)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  On either side of Lyon's Gate (ST 660 060). 
Reference Section  Hazelbury Bryan Borehole (ST70NE/3) (42.02m - 43.56m). 
Reference(s):
Bristow, C R, Barton, C M, Freshney, E C, Wood, C J, Evans, D J, Cox, B M, Ivimey-Cook, H C, and Taylor, R T. 1995. Geology of the country around Shaftesbury. Memoir of the British Geological Survey, Sheet 313 (England and Wales). 
Freshney, E C. 1992. Geology of the Bishop's Caundle - Glanvilles Wootton district. British Geological Survey Technical Report WA/92/82. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E313