The BGS Lexicon of Named Rock Units — Result Details

Twente Formation

Computer Code: TN Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Marine Isotope Stage 2 (QMIS002) — Marine Isotope Stage 2 (QMIS002)
Lithological Description: Fine-grained, well-sorted, wind-blown periglacial sands, evidence of cryoturbation in onshore exposures in the Netherlands.
Definition of Lower Boundary: In type section rests on marine sands of Eem Formation (Eemian Interglacial). In Flemish Bight Sheet, rests on the Eem Formation or on brackish-marine early Weichselian clays of the Brown Bank Formation.
Definition of Upper Boundary: Overlain by early Holocene peat or brackish marine sand (Elbow Formation) or marine sand (Bligh Bank Formation).
Thickness: 1 - 25 metres
Geographical Limits: Not defined.
Parent Unit: California Glacigenic Group (CALIF)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
Zagwijn, W H and Staalduinen, C J van den. 1960. "In" Toelichting Bij Geologische Overzichtskaarten Van Nederland. Rijks Geologische Denst. 
Stoker, M S, Balson, P S, Long, D, and Tappin, D R. 2011. An overview of the lithostratigraphical framework for the Quaternary deposits on the United Kingdom continental shelf. British Geological Survey Research Report, RR/11/03. 48pp. 
Van Den Toorn, J C. 1960. Een geologische excursie rond Deurne. Jaarverslag van der Geologische Stichting, 50-57. 
Gatliff, R W, Richards, P C, Smith, K, Graham, C C, McCormac, M, Smith, N J P, Long, D, Cameron, T D J, Evans, D, Stevenson, A G, Bulat, J, and Ritchie, J D. 1994. United Kingdom offshore regional report: the geology of the central North Sea. (London: HMSO for the British Geological Survey.) 
Cameron, T D J, and Holmes, R. 1999. The Continental Shelf. 125-139 in A revised correlation of Quaternary deposits in the British Isles. Bowen, D Q (editor). Special Report of the Geological Society of London, No. 23. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable