The BGS Lexicon of Named Rock Units — Result Details

Bindon Sandstone Member

Computer Code: BDNS Preferred Map Code: notEntered
Status Code: Full
Age range: Albian Age (KA) — Albian Age (KA)
Lithological Description: Fine- to coarse-grained, glauconitic sandstone, locally very shelly with thin lenticular and tabular beds of chert. Locally developed thin glauconite-rich horizons and complex bedding, including slump bedding.
Definition of Lower Boundary: The lower boundary is immediately above the Whitecliff Hardground, a mineralised surface, at the top of the Whitecliff Chert Member. Chert horizons are generally much thinner and less regularly developed in this member than in the Whitecliff Chert Member.
Definition of Upper Boundary: The top of the member is marked by the Small Cove Hardground, immediately below the base of the Beer Head Limestone Formation. In most areas the boundary is a sharp upward facies change from glauconitic sandstone to indurated limestone. A less-pronounced facies change occurs where the Bindon Sandstone is locally overlain (e.g. Hooken Cliff) by the Wilmington Sandstone Member (nodular calcareous bioclastic sandstone) of the Beer Head Limestone Formation, but the Small Cove Hardground is a persistent feature.
Thickness: Up to 8m.
Geographical Limits: Sheet 326 (Sidmouth).
Parent Unit: Upper Greensand Formation (UGS)
Previous Name(s): Shapwick Member [Obsolete Name And Code: Use BDNS] (SHWK)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Bindon Cliff [SY 277 897], south-east of Axmouth, Devon. See Edwards and Gallois (2004, Figure 3). 
Reference Section  Shapwick Grange Quarry [SY 3130 9190], Edwards, Gallois and Hamblin (2004). 
Reference(s):
Smith, W E. 1961. The detrital mineralogy of the Cretaceous rocks of south-west England with particular reference to the Cenomanian. Proceedings of the Geologists' Association, Vol.72, 303-331. 
Edwards, R A, Gallois, R W and Hamblin, R J O. 2004. Geology of the Sidmouth district. Sheet Explanation of the British Geological Survey, Sheets 326 and 340 (England and Wales). 
Woods, M A. 1999. Upper Greensand and Chalk macrofossils from the Sidmouth Sheet: 1:10 000 quarter sheets: ST10SW, ST19NW, SY28NW, NE. British Geological Survey Technical Report, WH/99/89R. 
Woods, M A. 2000. Contribution to the Sheet Description of the Sidmouth district: Jurassic and Cretaceous biostratigraphy. British Geological Survey Internal Report, IR/00/22. 
Jukes-Browne, A J and Hill, W. 1900. The Cretaceous Rocks of Britain. 1. Gault and Upper Greensand. Memoir of the Geological Survey of Great Britain. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E326