| 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
|
| Stratotypes: |
| 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]. |
| Reference(s): |
| 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 |
