| Computer Code: |
CRG |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Bajocian Age (JB)
— Bajocian Age (JB) |
| Lithological Description: |
Yellow, medium-grained, cross-bedded, calcareous sandstone with bivalves, pentacrinoid columnals and abundant burrows. |
| Definition of Lower Boundary: |
Underlain by the Brandsby Roadstone Member (BRBY). |
| Definition of Upper Boundary: |
The upper boundary with the overlying Moor Grit Member (MRG) of the Scalby Formation is poorly exposed. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Kirby Knowle, in south-west of Cleveland Basin. |
| Parent Unit: |
Scarborough Formation (SCR)
|
| Previous Name(s): |
Criniod Grit
(-820)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Quarry near Kirby Knowle [SE 4744 8777]. |
| Reference(s): |
| Barron, A J M, Lott, G K, and Riding, J B. 2012. Stratigraphical framework for the Middle Jurassic strata of Great Britain and the adjoining continental shelf. British Geological Survey Research Report RR/11/06. |
| Richardson, L. 1912. The Lower Oolitic Rocks of Yorkshire. Proceedings of the Yorkshire Geological Society, Vol.17, 184-215. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
