The BGS Lexicon of Named Rock Units — Result Details

Dulcey Dock Member

Computer Code: DYDK Preferred Map Code: notEntered
Status Code: Full
Age range: Albian Age (KA) — Albian Age (KA)
Lithological Description: The member comprises red nodular limestone. Beds rich in Inoceramus lissa and Biplicatoria hunstantonensis, and the breccia nodule bed (sensu Jeans, 1973) are important marker horizons.
Definition of Lower Boundary: The boundary is placed at the change from alternating white and pink limestones and grey or red marls or clays of the Speeton Beck Member into nodular limestones.
Definition of Upper Boundary: The boundary is defined by the change from nodular limestones of the member to "brick"-red marls and marly limestones of the overlying Weather Castle Member.
Thickness: 6.7m.
Geographical Limits: Recognized only on the Yorkshire coast near Speeton.
Parent Unit: Hunstanton Formation (HUCK)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Crab Rocks to Red Cliff Hole, Filey Bay, Yorkshire, to the east of Dulcey Docks where the lowest bed forms a step onto the beach [TA 1548 7510 to 1523 7515]. 
Jeans, C V. 1980. Early submarine lithification in the Red Chalk and Lower Chalk of Eastern England; a bacterial control model and its implications. Proceedings of the Yorkshire Geological Society, Vol.43, 81-157. 
Mitchell, S F. 1995. Lithostratigraphy and biostratigraphy of the Hunstanton Formation (Red Chalk, Cretaceous) succession at Speeton, North Yorkshire, England. Proceedings of the Yorkshire Geological Society, Vol.50, 285-303. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable